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D E P R T M E N T
O T H R M Y T E C H N I C
L
M
N U L
CONTINENT
AL
6
CYLINDER E
NGINE
MODEL
AOS 895
DEP RTMENT
OF
THE
RMY
JULY 952
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T M
9 1730A
T E C H N I C A L M A N U A L
C O N T I N E N T A L 6 C Y L I N D E R
E N G I N E M O D E L
A O S 895 3
TM9-1730A DEPARTMENT OF THE ARMY
C H A N G E S No.
if
W A S H I N G T O N 25, D. C., 28 November 1955
TM
9-1730A,
8 July
1952, is
changed as follows:
72. Cleaning Inspection and Repair of Crankshaft Assembly
.
Inspection.
1)
Crankshaft .
c) Check main
bearing
a
dial
indicator.
Note. Superseded)
Very
fine
markings
in the
thrust
area of
the crank journals may be polished over if new bearings are to be
installed. Reclamation of
worn
crankshafts
by
regrinding to
0.0100
undersize is permitted c l) o.l) below).
c.
Repair.
1)
Crankshaft .
a) Polish out any volatile mineral spirits,
a.l) Added)
During repair
or
rebuild
of engine,
any crank
shaft that is worn
beyond the wear l imits specified in
paragraph 154 may be reclaimed by grinding to 0.0100
undersize. Crankshaft must be held
to
th limits estab
lished in repair
and rebuild
standards par. 154) and
to the
specifications
in
and
2
below.
/.
Surface roughness
on
crank
pin
and journals not to ex
ceed
12
micro
inch.
2 . Crankshafts must
be inspected by the
electro
magna-
flux method
for
fractures and surface cracks after
finishing.
TAGO
307-JB Dec. 360482 55
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153. Crankcase
(par. 69)
6.
Main
bearings.
Figure
N o.
*
132
(Added)
(Added)
*
Reference
letter
*
DD
DD
G
G
*
Point
of
measurement
* * »
OD o f main
bear ing journals
o n crankshaft— standard.
OD o f main bear ing journals
o n crankshaft— 0.0100 un -
dersize.
ID o f main
bearings
at
proper
tightness
—
standard.
ID o f m ain bearings at proper
tightness— 0.0100 under -
size.
* *
Sizes
and fits
of new parts
*
3.4970
to 3.4980.
--
3.4870
to
3.4880
3.5015
to
3.5040
3.4915 to
3.4940
*
Wear
limits
*
3. 4957
14857
3.
5053
14953
*
154. Crankshaft and Connecting Rod
Assembly
(par. 72)
a r a n k s h a f t
Figure N o .
*
132
(Added)
132
(Added)
132
*
132
(Added)
132
131
(Added)
131
*
Reference
letter
*
DD
DD
G
G
*
D
D
N
N
*
Point
of measurement
* * *
OD o f main
bearing
journals—
standard.
OD
of main
bear ing journals
—
0.0100 unders ize.
ID
o f
main
bearings at proper
tightness
— standard.
ID
of
main bearings
at
proper
tightness
—
0.0100 under
size.
*
OD
o f c o n n e c t i n g
rod
jour
nal— standard.
OD o f
connec t i n g
rod jour
nal
—
0.0100
unders ize.
ID o f connec t i n g rod bear ing
at
proper
torque
tightness
o n bolts (par.
167)
— stand
ard.
ID o f c o n n e c t i n g rod bear ing
at proper torque tightness
o n
bolts
(par.
167)— 0.0100
unders ize.
* *
S i z e s and fits o f new
parts
*
3.4970
to
3.4980
3.4870 to
3.4880
3.5015
to
3.5040
3.
4915
to
3.4940
*
3.2480
to
3.2490
3.2380
to 3.2390. . .
3.2525
to
3.2540...
3.2425 to 3.2440
Wear
limits
*
3. 4957
3 . 4857
3 . 5053
3.
4953
3 . 2460
3 .
2360
3 .
2560
3 . 2460
*
T GO 74B
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6 . M
ain
bearings.
F
igure No
.
132
A d
ded)
132
Adde
d)
1 32
Reference
letter
*
G
G
DD
DD
Point of
me a sure me nt
*
*
ID of main bear in g s
at
proper
tightn
ess
—
stan
dard
ID o f
m a i n
bea ring
s
at
pro
pe r
tightness
—
0. 0100 u n d
ersize.
O D o f m a i n
bearing jo
urnals—
st
andard
O D o f m a i n
bearin g
journals—
0.0100
u n dersize.
Sizes a nd fits of n ew pa
rt s
* *
3.5015 to 3.5040...
3
.491 5 to 3.49
40...
3 .497
0
to
3 .4980
3 .4
870 to
3.4880
We a r
lim i
ts
*
3 . 5053
3 . 4953
3 . 4957
3 . 485
7
*
c.
Connecting
rods
.
Fi g u re N o.
*
131
Added
)
131
1 3
2
A
dded)
132
Refe
rence
l
etter
*
N
N
D
D
*
Point
of me a sure me nt
*
*
ID o f
c o n n ecti
n g
rod bearing
w
hen instal
led with prop
er
torque
o n
bo lts pa r.
167)
—
standard
ID of c o n n e c
t ing rod
b
e a r i n g
w h e n
in stal
led
with pro
pe r
torq
ue o
n
bolts
par. 16 7
)
—
0 . 0 1 0 0 u
ndersize.
O D
o f crank
shaft journal—
standard.
O D
of crankshaf
t journal
—
0 . 0 1 0 0 u n d
ersize .
Size
s
and flts
of
n
ew p
arts
*
3 .2525 to
3 .2425 to
3 .2480 to
3 .2 3 8 0 to
3.2540...
3 . 2 4
40
3 . 2 4
90
3 . 2 3 9 0
W e a r
lim its
*
3 . 2 5 6 0
3 . 2 46 0
3 . 2 4
6 0
12360
»
[4
12.5 4
N
o v 55)]
TAGO 74B
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YORDER O F
THE SECRET
ARY OF THE ARMY:
OFFICIAL
M
AXWELL
D.
T A Y L O
E ,
General,
United States Army,
Chief
of
Staff.
JO
HN
A .
KLEIN,
Major General,
United Sta
tes
Army
,
The Adjutan
t General.
DISTBIBUTION:
Active
Army:
CNGB
(1)
Tec S v
o,
D
A
(2) except
COFORD
(25)
Ord Bd (2)
Hq
CO
NARC (3)
A r my
A A
Com
d
(2)
OS Maj
Comd
(2)
OS Base C o md (2)
L og
Comd (3)
MDW (1)
A rmies (3)
Corps
(2 )
Div
(2)
Ord
Gp
(2 )
Ord Bn (2 )
except
TOE 9-45R (1)
Ord
C o (2 ) exc
ept TOE 9-12
R,
9-17R, 9-46R, 9-47R
, 9-49R,
9-57R, 9-229R, 9
-347R, 9-
367R
, 9-387R
(1 )
Ft &
Cp
(2 )
G
en Br Svc S ch (2)
(except O rd
S ch (50)
PMST
Ord
RO
TC
Units
(1)
Gen
Depo
ts (2) except
Atlanta
Gen Depot (None)
O rd
Sec,
Gen Depots
(5)
O rd Depot (10) except
Rossford O
rd
D
epot (1 2)
Anniston O
rd
Depot
(1 8)
Trans Terminal
Comd
(2 )
O
S Sup A
gencies
(1)
O rd PG (10)
O rd
A rsenal
(5)
except
Raritan A rsenal
(100)
B enicia A rsenal
(20)
Mil
Dist
(1)
O rd
Proc Dist (10)
M A
A G (1)
Mil Msn
(1 )
NG: St
ate A G (6); units—same
as Active A
rmy except allow
ance
is
one
copy to
each unit.
USAR: Non
e.
For
explanation
of
abbreviations
used,
see
SR 320-50-1.
TA
GO 3074B
6PO 924217
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TM »-1730A
C-2
TECHNICAL M
A N U A L
AOS-8
95-3
H E A D Q UA E TE R S,
DEPARTMENT
O F
THE A
RM Y
W A S H I N G T O N 25, D.O.,
7 December 1959
TM
9-1730A
C H A N G E S No.
2
TM 9-1730A,
8
July
1952, is changed a
s
follo
w s:
151 ylin ers
(par.
64)
b Cylinder Bor
e
Figu
re
No.
*
E
eference
letter
*
Point of measurement
* *
Maximum
out
of
round of cylinder
bore.
Sizes and fits
of new
parts
*
*
0 . 0010
Wear
limits
*
0. 0 0 5 0
A G
412 .5
(2 Nov
59)]
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By Ord
er
o
f Wilber
M
. Brucker S
ecretary of
the Army
:
L. L. LEMN
ITZEB,
Gen
eral United Stat
es Arm
y
Official:
Chief
of
Staff.
R .
V
.
LE
E,
ajor Genera
l nite
d
S
tates
Army
Th
e
Adju
tant G
eneral.
Distr
ibution:
Act
ive
Army:
Tech Stf ,
DA
1)
except CofOrd
14)
Ord B d
2)
U S
A R A D C O M
Egn 2)
U S A R A D C
O M 2)
OS M
aj
C o m d
2)
except
USCINCEU
R
7)
OS Base C o m d 2)
Log Co m d 3)
M OW
1)
A r m i es
3
) except First U S
A
r m y
5)
Corps
2)
Div 2)
Ord G p 2)
Ord Bn
2)
Ord Co
2) except
TOE a: 9-12,
9-17, 9-45, 9
-4 7, 9-57,
9-229,
9-347, 9-367,
9-37 7, 9-
3 87
n o n e ) .
Ft B ra
g g 2), Ft Hood,
Ft S a m
Hous
ton 7), Ft B
liss
9),
Ft
Sill
6), Ft
B
elvoir
7)
Svc College
2)
Br S
v c S c h 2)
except U S A O rd
S ch
50 )
PMST S r
Div O R D
Unit
1)
GENDE
P 2)
Ord
Sec, GENDEP
5)
O rd Dep
10) exc e
pt
Sioux
2)
NG: State A G 3
);
u n i t s — n on e .
USAR:
N one.
F
or
explana
tion o f
abbreviatio
ns used,
B
lack H ills,
Savanna
5),
To o
ele
4),
S
ierra,
Umatil la , W i
ngate
3),
R o ssford
1 2 ),
An n i s t o n
O
rd Dep 18)
Port of Emb OS)
2)
OS Sup
A g c y 1)
Ord PG
10)
Ord A r
senal 5)
e:
c e
pt
Benicia
3 0)
,
R o c k
Island 12), F
rank-
ford
45
),
Raritan
5
8),
Joliet
4),
L
ake
City
3), Radfo
rd
A rsen
al 1)
S pring
field A rm
ory 2)
O rd Pr
o c
Dist
1)
except N e w
York
5),
Ph
ila 4), St Louis
3 ),
Clevel
a n d 2), Chicago
Ord Dist n o n e )
O
rd Tank
Autmv C o m d
55)
Ord
A
m m o C o m d
1)
Fid C
omd, D e f Atomic
Spt A
gcy
1)
U S A
C o r p
s R e s )
1)
JUSMAG
G r e e
ce) 2)
JB USMC
2)
M A A G : Belg iu m
, G e r m a
n y,
Italy,
Japan
, S pain,
United
Kingdo
m 2)
Units o r
ganized unde
r following
TOE: 2 9-5
5 2)
see A R
3 2 0 - 50 .
U S GOVERNMENT
PRINTING OFFICE
: 1959
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D
EPARTMENT
O
THE
A
RMY
TECHNICAL MANUAL
TM 9 1730A
C
ONTINENTAL
6-CYLI
NDER E
NGINE
A OS 89
5 3
DEPARTMENT
O THE
RMY ULY 1952
United
Slates
Government
Printing
Office
Washington 952
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This manual is
correct
to
13
June
1952
D
EPARTMENT
OF
THE
A R M
Y
WASHIN G
TON 25, D .
C .
,
8 July
1952
T
M
9-1730A is published
for
the info
rmation and
guidance o
f
all c
oncerned.
[AG
412 .5 (23
Jun
52)]
Y
O
RDER OF THE S E
CRETA R Y OF
THE AR
MY:
O F F I C I A L
: J. LA
W TON
C O
L L I N S
W M .
E. BER
GIN Chief of Staff Un
ited States Arm
y
Major Gener
al USA
The A
djutant Genera
l
D I S T R IB
U T I O N :
Active Army:
Tech
S
vc (1) ; Tech
S vc B
d
(2)
; AFF (2) ;
AA
C om d
(2); O S
Maj Co
md
(10)
; Base C o m d
(2); M D W (3);
Log
C o m d (5)
;
A (20
) ; C H Q
(2); Div (2)
; Regt
9
(2); Bn 9 (2)
; C O 9
(2); FT
(2); S c h (5) except 9
(50); PMS & T 9 (2)
; G en Dep
(2); Dep 9
(10); POE
(5),
O S D
(2);
PRGR
9
(10);
Ars
9 (10);
Proc
Dist
9
(10) ; M il Dist (
3).
N
G: Sa
me as Active
Army
exce
pt
one cop
y
to
each
unit.
ORC
:
Same
as
Acti
ve Army
except one
copy
to
each uni
t.
For
explanation
of distr
ibution fo
rmula, see SR 310-90-
1.
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CONTEN
TS
Paragraphs Page
Section I General ___________
_____________
1-3
1
//
Description and data ______________
___ 4-6
5
CHAPTER
2.
PARTS SP
ECIAL
TOOLS
AND EQUIP
MENT
FOR
FIELD 7 10 9
AND D E
PO T
MAINTENANCE.
3.
TROU
B L E
SHOOTING
Section I General ______________
__________
11-12 2 3
II Engine ______________
__________
13-14 2 4
CHA
PTER 4. ENGINE
Section I
Description and data
_______________ 15-33 33
// Preparation
of engi
ne
fo
r rebui
ld _________ 34-36
46
III Disassemb
ly of
stripped
engine
in
to
sub
- 37-55 51
assemblies.
IV
Rebuild of
accessory
c a s e _ — — — — — — — — _ — — —
56-59 69
V
Rebuild
of
camshafts
and
drives_________
60-62
116
VI
Rebuild of
cylinders__
_______________
63-65 12 2
VII
Rebuild of pistons, pins, and rings________
66-68
134
VHI
Rebuild of
cr
ankcase________________
69-79 137
IX Rebuild of crankshaft
and
conne
cting rod
71-73
1
41
assembly.
X Rebuild
of
oil
pumps________________ 74-75 1
51
XL
Rebuild of
cooling
fan
and
fan
clutch assembly
76-78
15 8
XII Reb
uild of throttle linkage_____________
79-81 16 2
XIII Cleaning, inspection, a
nd repair of individual
82-101
170
parts.
XIV
Assembly of engine
from subas
semblies____ 102-128 2 08
XV Tes
ts
and adjustments ____
__________ 129-13
1
2 4 2
XVI Run-in
t
est
_______
_______________
132-134 2 43
CHAPT ER
5
HYDRAULIC
GOV
ERNOR 135-138 246
6. REPAIR
AND R EB U I LD STANDARDS _——_________
139-167 253
APPEN
DIX REFERENCES
___—
—__-__—__——————__————___
_______ 3
45
INDEX
_______— — — -— — — — — —
— - — — — — — — — — — — — — — — — — — — — — — — —
——______ 350
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CHAPTER
INTROD
UCTION
Sec t i o
n
I.
GEN ERAL
1. Scop e
a. This manua
l is
p
ublished
for t
he
i
nformation
and
guidanc
e
of
person
nel
responsible for fi
eld and depot
maintenance of
this
materiel.
It
contains
information
on
maintenance
which
is beyond
the
scop
e of the
tools, equipm
ent or
sup
plies no
rmally available
to
using
o
rganizations. This
manual do
es not cont
ain
in
formation
intended primarily
for the usi
ng
or
ganization, since
such inform
a
tion is available
to
ordna
nce maintenance
personnel in
the perti
nent
operators tec
hnical manuals
or field manuals
.
b . This
manual
contains
a
description
of and
procedur
es
for
removal
disassem
bly,
in specti
on, repair,
rebu
ild, and assembly
of the stripped
engine. This m
anual
does no
t
in c
lude mai
ntenance
information on
the
accesso
ries in
dicated in d
through g below
.
The a
ppendix contains a
list of current
references
,
includin
g sup
ply
catalogs,
technical ma
nuals, and
other available publ
ications
appl
icable
to the mate
riel.
c.
TM 9-730 and
TM
9-761A
contain
operatin
g
and
lubr
i
cat
ing instruction
s for the
materiel
and
con
tain
all
m
aintenance
operations
allocated to
using o
rganizations
in pe
rforming
main
tenance work w
ithin their sco
pe.
d. T
M 9-182 6B contai
ns
s
ervice info
rmation on
the Stromb
erg
carbure
tors.
e. T
M 9-182
8A
c
ontains service i
nformation on
the
fu
el pump
and
fu
el filter.
/. TM 9-1825C
contains service
information
on t
he
Eclip
se-
Pio
neer generator and
starter.
g.
TM
9-1825E
contains
service
information
on
the
Bendix-
Scinti
lla magneto
s.
h. This
first edition manua
l is
publishe
d in adva
nce of
complete
technical review
.
A n y er
rors
or
o
missions
will
be br
ought to
the
atte
ntion of
the Chief
of Ordnance
Washing
ton 25, D.
C
., Atten
tion, O
R D F M .
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2.
Fie ld
and
Depo t
Maintenance Al loca t ion
The publication of instructions for comple te
disassembly
and
rebuild is not to be construed as
authority
for the performance
by
field maintenance
units o f
those
functions
which
are
restricted
to
depot shops
and
arsenals. In
general, the prescribed
m a in
tenance
responsibilities wil l
apply
as ref lected in the al loca t ion o f
maintenance parts listed in the appropriate
co l u mn s
o f the
cur
rent
ORD
8 supply catalogs
pertaining
to vehicles using this
engine . Instructions for depot maintenance are to be
used by
maintenance compan i e s in the field on ly when the
tactical
situa
t i o n makes the
repair
functions imperative. Supply o f parts
l isted
in
the
depo t gu ide
c o l u m n
of
ORD
8
supply catalogs
wil l
be
made
to f ield maintenance
on ly
when
the
e me r g e n cy nature o f the main
t enance to be performed has
been
ce rti f ied by a responsible officer
COOLING FAN
OUTLE T V NE HOUSING
OIL
COOLE R
ASSY
HOT
S P O T
OUTLE T
HO U S IN G ASSY
HEAT
C O N T R O L
LEVER
HO U S IN G
FUEL FILTER
ASSY THROTTLE UNKAGE
CROSS SHA FT
ASSY
i T A C H O M E T E R
TRANSMITTER
ASSY
RA PD
5587
Figure 1 .
Engine
right front.
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'
CRA
N 'KCA
SE
:Q fL
PAN
-
AS
SY
.
.
«
A.
Pp 1
35872
Fi
gure
2
Eng
ine left
rear
of
the
r
equi
sitio
ning
orga
niza
tion
and u
pon
exp
ress
au
thori
zatio
n
by the
chi
ef
of th
e serv
ice
co
ncer
ned.
3. Fo rm
s R
ec o
rd s a
nd
Rep o
r ts
a
G
ene
ral Re
spon
sibil
ity
for
the
p
rope
r
exe
cuti
on
o
f for
ms,
re
cord
s,
an
d repo
rts
rests
up
on
the
officers
of
all
units
main
t
ainin
g
this e
quipm
ent
.
How
eve
r, the
va
lue o
f
a
ccur
ate rec
ord
s
m
ust
be fu
lly
a
ppre
ciat
ed b
y a
ll
pe
rson
s re
spon
sibl
e
fo
r
t
heir
c
omp
ilati
on, main
tena
nce,
and
us
e. Rec
ords
,
rep
orts
,
an
d au
thor
ize
d
form
s
are
nor
mall
y uti
lized
to
ind
icat
e th
e q
uant
ity, an
d co
n
d
ition
of m
ater
iel to
be
insp
ecte
d, to
be
repa
ired,
or
t
o be
u
sed
i
n
rep
air. P
rop
erly
ex
ecute
d
form
s co
nve
y a
utho
rizat
ion and
s
erve
as
re
cords
for
repa
ir or
rep
lace
men
t o
f
mate
riel in
the
hands
of
troops and
for
delivery
of
materiel requiring
further
rep
air
to or
dnan
ce
s
hops
i
n a
rsena
ls, de
pots,
etc
.
T
he
form
s,
re
cord
s, a
nd r
epor
ts e
stab
lish
the w
ork
r
equi
red, th
e
prog
ress
of
the w
ork
w
fthi
n t
he
sh
ops, and
t
he sta
tus
of
the
ma
terie
l up
on
c
omp
letio
n of
its
repa
ir.
b
Au
thor
ized For
ms
The
form
s gene
rally
app
licab
le
to un
its
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Figure
S.
ngine
front
accessory
end).
maintaining
thi
s equipment
are
listed
in
the ap
pendix. For cur
rent
and
complete
l
isting of
all forms, refer
to
current
S R
310-
20-6. A
dditional form
s applicable to t
he
using
pers
onnel
a
re
listed in the op
erators manual.
c. Fie
ld Reports of Accide
nts. The
reports necessary
to
co
m
ply
with the
requirements
of
the Army
safety
program are
pre
scribed
in
detail
in
the
S R
385-10-40 series
of
special
regula
tions.
These reports
are
req
uired wh
enever
ac
cidents
involving
injur
y to perso
nnel or damage to materiel
occur.
d. Report
of Un
satisfactory Equipm
ent
or
Mate
rials. A ny
suggestions
for
improv
ement in d
esign and mainten
ance
of
e
quip
ment
, safety
and efficiency
of operation,
or pertaining to the ap
plicat
ion
of
prescribed
petroleum
fuels, lubricants,
and/or
pre
serving materials,
will be reported
through
technic
al
channe
ls
as
prescr
ibed
in
S R
700-45-5 to the
C hief of Ordnance,
Washington
25, D.C. ,
ATTN: O
R D F M,
using
D
A
Form
468 , Unsatisf
actory
Equipment
Report.
Such suggestions ar
e encouraged
in order
that
other organi
zations m
ay ben
efit.
N
ote. D o not report
all
failures tha
t
oc
cur.
Report
only
REPEAT
ED
or RECURRE
NT failures or
malfunction
s
which
indic
ate
unsatisfactory
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design or material. However ,
reports
wil l always be made in the event that
exceptionally cost ly equipment
is
involved.
Se e
a l s o S R
700-45-5
and the
printed instructions o n D A Form 468.
Sect ion
II.
DESCRIPTION
AND
D A TA
4.
Descr ip t ion
a. The
Continental
eng ine , Model AOS-895-3
is
a 6-cylinder
horizontal ly-opposed, four-cycle,
air-cooled,
supercharged eng in e
with
overhead valves. The
cylinder
assembl ie s are individually
replaceable units. They have the valve
rocker
assembl ie s i n the
head, and are arranged in t w o banks o f three cylinders each, with
a
camshaft
to
actuate
the
valves
o f
each
bank.
A
mechan ica l ly
driven fan,
loca ted o n the top o f the
eng ine , is
provided
to
cir
cu late air around the cylinders for cool ing . Baffles are mounted
on the
cyl inders
to direct the
air f low.
A n
accesso ry case
pro
vides
a
m e a n s for mounting and driving
the
e n g i n e
accessor ies .
The supercharger is
attached
to the accessory case and is driven
by
the chain
o f
gears in the accessory
case. A
mechan i ca l type
fue l pum p, actuated by an engine-driven
eccentric cam, is mounted
behind
the
right
carburetor.
Figure
4 . Engine
rear flywheel end).
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6.
Two
conventiona
l, doub
le-venturi, down-draft
ca
rburetors,
one fo
r
each
bank o
f three cylinders, are
mounted
on the
c
arbu
retor
elbow.
The
elbow is
a
jacke
ted cast alu
minum housing
with
two inl
ets and
a
com
mon outlet at it
s
center
. Th
e
o
utlet is at
t
ached
t
o the inlet
of the super
charger housing.
Jacketed pass
ages
of
the
carburetor
elbow
are
connected
to
the exhaust
manifolds,
and exhaust
ga
ses
p
assing
through the passages
are controlled
by a vacuum
controlled
valve. Air is drawn
through th
e
carb
u
retors, and
the carbureted
m
ixture is
heate
d as it
passes through
the elb ow
into the superc
harger housing. The
supercha
rged mix
ture
then
passes
to the
intake manifolds loc
ate d
on
each
bank
of
cylinders.
c
Dual
ignition is
provided by two
magnetos, each
one
ignitin
g
six
spark
plugs.
The
inner
magneto
fires
the
accessory-end
spark
plug
in each
cylinder.
The
outer
magneto fires the
flywheel-en
d
spark plug
of each
cylinder. A n
ignition harness
connects each
magneto to
its
spark plu
gs. The magnetos
and ignitio
n harness
are waterproof
,
and
sh
ielded to preven
t radio interference.
d T he engine
i
s
lu
bricated
by a for
ced feed system.
A com
binatio
n scavenge
r and pressure
pump and a sepa
rate access
ory
case scav
enger oil pump
(fig. 11) supply
oil to the lubricatin
g
system. The
combination
pump
is
mounted
on
the
lower
side
of the
crankca
se.
Th
e scavenger pump
of th
is combination
unit
transfers
oil
fr
om the
flywheel end o
f
the
oil p
an
to th
e
reservoi
r
of
the
pressure
pum
p. The separate
scavenger pump
transfers
oil
f
rom the a
ccessory case su
mp to the pressu
re pump
reserv
oir.
With
the
scavenger
pumps constan
tly
t
ransfering
oil from both
ends of the engin
e, the
pressure
pump
is assured
an adequa
te
supply
of oil
at all
tim
es. In normal op
eration, the
oil
pass
es
from the
pressure
pump
through
passages
in
the
crankcase
and
acc
essory
case to the oil control
housing.
It
then
passes through
ex
ternal
oil
line
s to the
external o
il cooler an
d
returns
to the
engin
e throug
h
the
oil co
ntrol
housin
g and the
oil filter.
The oil
flow (fig. 12
) is
contr
olled by
four valves.
A noil pressu
re con
trol
valve
,
an
oil
fi
lter b
y-pass valve, and a
n oil coo
ler
by-p
ass
v
alve are
all located in the
oil control h
ousing.
Th
e four
th valve,
a temperature
and pressure unit, is located
on
the
oil co
oler.
e
gener
ator and
a
sta
rter are m
ounted on opposite
sides of
the accessory
cas
e.
5.
En g in
e
N
omenc latu re
I
n this manual the
following
terms w ill be
used to identify
the location
of parts and
assemblies:
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Figure
5
Engine
right 1-3-5)
si
—
shroud
removed.
a
T
he
e
nd
s
of
th
e e
ng
ine
wil
l b
e
ca
lle
d t
he
acc
es
so
ry
en
d
o
r
f
ron
t
an
d t
he
fl
yw
he
el
en
d
o
r
re
ar
.
b
As
v
iew
ed
fr
om
th
e ac
ce
sso
ry
e
nd
t
ow
ar
ds
t
he
fl
yw
he
el
en
d,
th
e
sid
e to
th
e
rig
ht
w
il
l
be
ca
lle
d
the
r
igh
t
(1
-3
-5
)
sid
e
a
nd
the
side
to
the
left
will be called
the
left
(2-4-6)
side.
Be
gin
ni
ng
at
the
ac
ce
sso
ry
e
nd,
th
e
ri
gh
t ba
nk
o
f
cyl
ind
er
s
is n
um
be
re
d 1
-3
-5,
and
th
e
l
eft
ban
k
is
nu
m
be
red
2
-4
-6
.
c . S
tar
tin
g
fr
om
th
e a
cce
sso
ry
e
nd
,
th
e
m
ai
n be
ari
ng
s a
re
n
um
be
red
fro
m
to
4 ,
an
d t
he
ha
lve
s a
re
id
en
tifi
ed
w
ith
ma
rk
ing
s
1-
3-
5 s
id
e
an
d
2-
4-
6 si
de
.
d
C
y
lin
der
s,
pis
ton
s,
co
nn
ect
ing
rod
s,
a
nd
c
on
nec
tin
g ro
d
be
ar
ings
are
numbered
with
their
respective cylinder
number
loca
t
ion
s.
Th
e
in
ta
ke
an
d e
xh
au
st
v
alv
e r
oc
ker
s a
re
id
ent
if i
ed f
urt
he
r
by
the
le
tte
rs
IN
T
o
r
EX
.
e
T
he
su
pe
rc
har
ge
r
s
ide
of
th
e a
cc
ess
ory
cas
e w
il
l
be
cal
led
fr
on
t
and
th
e
cr
an
kc
ase
sid
e w
ill
b
e
cal
led
r
ea
r.
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6. Tabulated Data
Crankshaft
rotation____clockwise, viewed from
front (accessory end)
Cylinder arrangement________________individual cylinders
in
a
horizontally-opposed
pos i t ion .
Cylinder c o o l i n g _ _ _ _ _ _ — — — — — — — — a i r supplied by one integral fan
Drive from crankshaft_____________________——_——direct
Dry weight comp l e t e
with
f lywheel and all
accessories______1,894
Ib
Firing order________________________________1-6-3-2-5-4
Horsepower
gross)_________________500
BHP at 2,800 rpm
Horsepower (net) (at 60° F. and 29.92 in-Hg__380 BHP
at 2,800
rpm
as
engine is installed
in
vehicle).
Induction
system____________—_______________supercharged
Make ________________.._________________Continental
Model __________________________________AOS-895-3
Number o f camshafts______.._______________________2
Number
o f cylinders__________________________________6
Numbering
of
cylinders from
accessory
case toward f lywhee l end:
Left side (as viewed from
accessory
end)____________2,
4, 6
Right
s ide
(as viewed from
accessory
end)_____________1, 3, 5
Oil pan capacity___________ _____________________11 gal
Output o f
oil pumps
(engine
oil SAE
50
at 180°
F.
and
90
psi):
Accessory
ca se
scavenger
oil
pump______________27.4 gm
Scavenger
and pressure oil pump (dual unit at 2,800 rpm):
Pressure oil
pump____..__________________29.7 g p m
Scavenger
oil pump____..__________________27.4 gpm
Over-all
dimensions
(including f lywheel assembly):
Length ______________.___________________47.43 in .
Width _________________________________51.56
in .
Height ______________._________________34.81 in.
Torque
(gross) ______________________975 Ib-ft at
2,250
rpm
Torque
(net)
(at 60°
F.
and
29.92
in-Hg______825 Ib-ft
at 2,000
rpm
as
engine is installed
in vehicle).
Type—
——————————————_————_——_—-6-cyl inder
air-cooled,
horizontally-opposed engine (supercharged).
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CHAPTE
R 2
PARTS
SPECIAL
TOOLS
AND
EQUIPMENT
FOR
FIELD A
ND DEP
OT MAINTENANCE
7.
General
Tools
and equipment and maintenance
spare
parts
over
and
above those availabl
e to the using organization
are supplied to
ordnance field maintena
nce units and depot sho
ps
for mai
ntain
ing, repairing,
and/or rebuilding the materiel.
8.
Par ts
Maintenance
parts
are
listed
in
Department
of
the
Army
Sup
ply
Catalog
O RD 8 SNL G
-251
which is the
authority for requisi
tioning
replace
ments.
9. C o m m o n To o l s and
Equ ipmen t
Stand
ard
and commonly used tools and equi
pment having gen
eral applicatio
n
to
this
materiel are listed in
O R D 6 SNL
J
-8
Section 1
12,13 and
18,
and O R D
6 SNL
J-9 Section
2 ,
3,
8 an
d
9 ,
and O R D
6
SNL J
-10 Section
4
and 8
and author
ized
for issue
by T/A and T/O E. They ar
e
not
specifically identified in this
manual.
10.
Spec ia l
To o l s and
Equ ipmen t
Table
I lists
those
special
tools
and equi
pment necessary to
perform the operatio
ns described in this
manual. This list is
included
for
information only, and is not to be
used
as
a basis
for requisitions.
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A—WRENCH, CYL H
O L D DOWN
NUT,
SGLE-HD BOX,
%-IN SQ -
DEIVE, DBLE-H
EX,
SI
ZE OF OPNG IN,
LGH 2 1 IN
41-W-872-715
B—
WRENCH,
CY
L H O L D DOWN NUT,
SGLE-HD
B
OX, %-IN
SQ -
DRIVE,
DBLE-HEX, SIZE
OF OPNG IN, LGH 2 1 IN
41-W-872-710
C—WRENCH,
OPEN
END,
OIL COOLER
NUT
7083738
D
—WRENCH, CRANKSH
AFT DAMPER COUNTERWEIGHT
PIN
41-W-870-50
E—WRE
NCH,
CROWFOOT,
CAMS
HAFT DRIVE 7083792
F—GAGE AND COMPRESS
OR,
PISTON
RING
41-G-53
4-50
G—REMOVER AND REPLACER, PISTON
RIN
G,
ID
6 IN, LGH 13A IN
41-R-2378-570
H—REPLACER, GUIDE (EXHA
UST
VALVE) 41-R-23
90-475
J—REPLACER, GUIDE
(INTAKE VALVE) 41-R-2390-482
K—COMPRESSOR, VALVE
SPRING
7083692
L—EYE,
LIFTING, CRANKCA
SE 41-E-615-350
M—PROTECTO
R,
CONNECTING R O D
, LGH 8 IN 41
-P-2839-535
N—SLIN
G, LIFT
ING
41-S-3829-720
P—
STRAP, CRANKCASE
TIE
R O D , LGH
5If
IN 41-S-5906-3
00
Q—WRENCH, STARTER JAW
B R G NUT 41-W-545-15
R—
HOLDER, STARTER DRIVE ADAPTER
AND JAW
4
1-H-2197-600
S—WRENCH, TUBULAR,
DBLE END, HEX, SIZE
OF HEX OPNGS,
1.655
x
1.915
IN,
LGH
6
IN
41-W-3727-33
T—
WRENCH, ACCESS
ORY DRIVE GEAR HUB NUT 41-W-430-275
U—REMOVER
AND
R
EPLACER, PLUG, T HDL, THD
IN-18NF-3
41-R-2378-57
5
V—REAMER, RO
UGHING, VALVE GUIDE S
TEM
HOLE
(EXHAUST),
DIAM
TAPERS
FR
OM 0.550
TO
0.56 0 IN, LGH 1 3 IN
14-R-
2254-5 70
W—REAMER,
FINISHING, VALVE GUIDE VALVE
STEM HOLE
(E
X
HAUST)
, DIAM TAPERS FROM 0.56
7
TO
0.5
6 2 IN,
LGH
1 3 IN
41-R-2254-520
X—REAMER,
ROUGHING, VALVE GUIDE VALVE
STEM HOLE (
IN
TAKE), DIAM TAPERS
FROM 0.488 TO
0.498
IN, LGH 1 3 IN
41-R-2254-552
Y—REAMER, F
INISHING, VALVE GUIDE VALVE
STEM HOLE (IN
TAKE), DIAM TAPERS FROM 0.495 TO 0.500 IN,
LGH
1 3 IN
41-R-2254-
505
Z—HANDLE, REMOVER
AND
R
EPLACER,
DIAM OF
SH
K 1 IN, LGH
1 3 IN 41-H-1396-510
AA—REMOVER, GUIDE
(EXHAUST VALVE),
DIAM
0.557
AND
0.743
IN,
LGH 22 IN 41-R-2371-20
BB—REMOVER, GUIDE (INTAK
E
V
ALVE), DIAM 0.495
AND 0.679 IN,
LGH 22
IN 41-R-2371-35
Continued
11
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A—PU
LLER, CRANKCASE SECTION
REMOVING
4
1-P-2906-280
B—SCREW, PULLER, %-16NC-2 7083740
C—SCRE
W , PULLER, THD
IN-20NF-2 FOR
5
IN, LGH
OVERALL
6 IN 41-S-1044-125
D—WRENCH, SPARK
PLUG
HOLDING,
LGH
6
IN
41-W-871-75
E—WRENCH,
IGNITION
HARNESS
NUT, LGH 6A IN 41-W-871-65
F—
WRENCH,
SPA
RK PLUG
INSERTING, THD
OPNG IN-24NEF-2,
LGH 5 IN 41-W-3306-500
G—TOOL,
EXT
RACTING, HELICOIL 41-
T-3092-350
H—LIGHT, TIMING, MAGNE
TO,
TYPE
B-l 41-L-1439
J—WRENCH,
ENGINE TURNIN
G,
LGH
3 IN
4
1-W-906-130
K—BUSHING,
PILOT
41-B-2181-175
L—BUSHI
NG, PILOT
41-
B-2181-150
M—REPLACER, OIL S
EAL, O D 2
.120
IN, LGH 1* IN
41-R-2392-995
N—WRENCH,
CROWFOOT, SENDING UNIT 7083852
P—DRIVER, INSERT
(ROSAN), %-28 TO %-16 41-D-296
7-750
Q—DRIVER, INSERT (ROSAN)
,
A-18
TO %-13 41-D-2967-752
R—DRIVER, INSERT (ROSAN),
A-24
T
O &-20 41-D-2967-755
S—DRIVER,
INSERT
(ROSAN), %-24
TO
%-20 41-D-2967-760
T—DRIV
ER,
I
NSERT (ROSAN), A-20 TO %-18 41-D-29
67-765
U—D
RIVER,
IN
SERT (ROSAN), %-20 TO /4-16 41-D-2967
-770
V—DR
IVER,
INSE
RT (ROSAN), %-18 TO
1-14
41-D-296
7-785
W—WRENCH, INSERT (ROS
AN),
%-28 T
O
%-1
6 41-W-1536-390
X—WRENCH, INSERT (ROS
AN),
A
-18 TO %-13 41-W-1536-391
Y—WRENCH, INSERT
(RO
SAN), A-24 TO
A-20 41-W-1536-393
Z—WRENCH, INSERT (ROSAN), %
-24
TO %-20 41-W
-1536-396
AA—WRENCH
, INSERT (ROSAN), ft-20 TO %
-18
41-W-1
536-399
BB—WRENCH, INSERT (ROSA
N), V2 -20
TO
%-16 41-W-1536-402
CC— W R
ENCH, INSERT (ROSAN), %-18 TO
1-14
41-W-153
6-410
DD—
WRENCH, IMPELLER
NUT
41-W-1536-235
EE—WRENCH,
PULLING
AND
DRIVING
, IMPELLER 41-W-1536-2
40
FF—TOOL, INSERTING,
HELICOIL 7751060
GG—GAGE, THKNS,
VALVE TAPPET ADJ, NUMBER
O
F
LE
AVES 4
41_G-41
5-375
Continued
13
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SET; jEAMING
r 41
F 2997 185
RE
M O VER KIT)
INSERT VALVE
SEAT
~
41-R
-2371-465
J '
RA
P
D 1558
78
L
. . .
.. .
..
_ _
Item
B
USHING, pilot_
_
BU
SHING, pil
ot—
Identifying
Number
41-B
-2181-150
41-B
-2181-175
Referenc
es
Fi
g.
L
,7
K,7
ar
64
6
4
Use
Used
w/RE
AM-
EE, fin
ishing—
41-R
-2254-520
and
REA
MER,
roughing
—
41
-R-2254-370
.
Use
d w/REAM-
ER, finis
hing—
41-R-2254
-505
an
d
REAMER,
roug
hing—
41-R-22
54-552.
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SLING,
LIFTING
ENGI
NE
AND TRANSMISSION
41 S 3832 22
K
IT
ASSE
MBLY
RA PD 155879
ENGINE STA N D 0 8
3741
15
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I
tem
CO
MPRESSOR
,
valve
s
pring.
DRIVER
, insert
(Rosan) %-28
to
%-16.
DRIVER,
inse
rt
(Rosan) A-1
8
to
V
2
-13.
DRIVE
R, insert
(Rosan) A
-24
to
A-20.
DR
IVER,
ins
ert
(Rosa
n) %-24
to
%-20.
DRIVER,
insert
(Rosan)
&-20
to
%-18.
DRIVER, in
sert
(Ro
san) %-20
to
%-16.
DRIV
ER, insert
(Rosan) %-
18
to
1
-14.
E
YE, lift
ing,
crankcase.
FIXTURE
SET,
reamin
g.
G
AGE AND
CO
MPRESSOR
,
piston
ring.
GAGE
thkns,
va
lve tapp
et
adj, number
of
leaves 4.
I
dentifying
Nu
mber
7083692
4
1-D-2967-7
50
41-D-2967-7
52
41-D-2967-
755
41-D-2967-
760
41-D-2967-765
41
-D-2967-770
41-D-29
67-785
41-E-6
15-350
41-F-29
97-185
4
1-G-534-50
41-G-415-37
5
R
eferences
F
ig.
6,59
P,7
Q,7
E,7
S,7
T,
7
U,7
V,
7
L,
6, 27
8
F,6,
63,96
CG,
7,
99, 101
Par.
63,65
57
57
57
57
57
57
57
55,
103
88
67, 10
5
108
, 10
9
Use
Removin
g
and
in
st
alling val
ve
springs.
Installi
ng Ros-
an in
sert lock
ing
rings.
Installi
ng Ros-
an
insert lock
ing rings.
Installing
Ros-
an inse
rt
lo
ck
ing rin
gs.
I
nstalling R
os-
an inser
t
lock
ing rings.
Installing
Ros-
an insert lock
in
g
r
ings.
Installing
Ros-
an insert
lock
ing rings.
Installing Ro
s-
an, insert lo
ck
ing r
ings.
Lifting
halves of
crankcas
e.
Re
aming
crank
sh
aft and fly
wheel dowel pin
hole
s.
Gaging
pist
on
ring g
ap and
installing
pis
ton
.
Setting valv
e
ro
cker clearan
ce.
1
6
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Item
H
AN
DL
E
r
e
mo
ver
an
d re
-
pla
cer,
di
am of
s
hk
1
in,
Igh
1
3 i
n.
H
OLD
ER
, sta
rter
dr
ive
ad
apte
r
an
d
jaw
.
KIT
ASS
Y (e
n
gi
ne
st
and
.
L
IGH
T,
tim
ing,
w/
batt
ery
an
d
n
eon
bu
lbs.
PR
OT
ECT
OR
(connecting
r
od .
PU
LL
ER
,
cran
k-
ca
se
sec
tion
re
m
ov
ing.
REAMER,
finish-
i
ng
val
ve
gu
ide
va
lve
st
em
ho
le (e
x
haus
t
dia
m
tap
ers
fro
m
0.
557
to 0
.562
in
, Igh
13
in.
RE
AM
ER
,
f
inish
-
ing v lve
g
ui
de
val
ve
st
em
hole
(e
x
h
aus
t , d
iam
tape
rs
f
rom
0.
495
to 0.
500
in
, I
gh 1
3
in.
Ide
ntify
ing
Num
ber
4
1-H
-13
96-
510
41
-H-
219
7-6
00
70
8374
1
41
-L-1
439
4
1-P
-28
39-
535
4
1-P
-290
6-2
80
41-R-2254-520
4
1-R
-22
54-5
05
R
efer
ence
s
F
ig.
Z,
6,
51
R
, 6
, 40
9
H
,7
M,
6,
23
A
, 7
,
2
6,
31,3
3
W
, 6
Y,6
Pa
r.
56,5
9
58
3
5,
1 03
1 09
52
, 1
03
5
4,
56
,
5
8
64
6
4
Use
U
sed
w
ith
WR
EN
CH—
41-
W-1
536
-23
5.
H
old
ing
sta
rter
dri
ve
a
dap
ter
and
jaw
.
Asse
mb
ly an
d d
is
a
ssem
bly
o
f en
gin
e.
Tim
ing
eng
ine.
Pr
ote
ctin
g
cran
k-
case
when
cyl
in
der
s ar
e
re
mo
ved .
Re
mo
ving
s
upe
r
ch
arg
er
hou
s
ing
,
sup
er
c
har
ger
di
ffus
er
a
nd
fa
n dr
ive
h
ous
ing.
Reamin
g ex
hau
st
va
lve g
uide
.
R
eam
ing
int
ake
valve guide.
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Ite
m
R
EAM
ER, ro
ugh
in
g, valv
e g
uide
va
lve stem
hol
e
(
intak
e) d
iam
t
apers
fro
m
0.488
to 0
.498
in,
Igh 1
3 i
n.
RE
AME
K,
ro
ugh
ing,
valve
gu
ide
valve
ste
m ho
le
(ex
haus
t),
diam
tap
ers
f
rom
0.5
50 t
o 0.560
in
, Igh
13
in.
R
EMO
VER
an
d
RE
PLA
CER
pisto
n
ring
,
ID
6
i
n,
Ig
h 13ft
in .
R
EMO
VER
and
RE
PLA
CER,
p
lug T
h
dl,
t
h d
i n
-
18NF
-3.
RE
MOV
ER, g
uide
(ex
haust
va
lve)
diam
0.557
and
0
.743 in
, Igh
2
2
in .
RE
MOV
ER,
gu
ide
(i
ntake
v
alve)
diam
0.495
and
0.6
79 i
n, Igh
22
in .
REMOVER
(K
IT),
inse
rt
(va
lve seat)
RE
PLA
CER,
gui
de
(
exha
ust
val
ve)
Identif
ying
N
umbe
r
41-
R-225
4-55
2
41-
R-22
54-57
0
4
1-R-2
378-
570
41
-R-2
378-5
75
4
1-R-
2371-
20
41-R
-2371
-35
41-R-2371-465
41-
R-23
90-47
5
R
eferen
ces
F
ig.
X,6
V,6
S,6
, 61
V
, 6,
19
AA,
6,
56
B
B,6,
56
8,58
H
, 6,
57
Par.
64
64
66,6
8
47, 10 9
64
6
4
64
6
4
Use
R
eami
ng
intak
e
v
alve gu
ide.
Ream
ing
exha
ust
va
lve g
uide.
Rem
ovin
g and
in
stalli
ng pi
ston
ri
ngs.
Rem
oving
a
nd
in
stallin
g c
m
sh
ft
r
iv
shaf
ts a
nd
oil
t
ransf
er pl
ugs.
Re
movin
g
exha
ust
valv
e guid
es.
R
emov
ing
intake
valv
e gui
des.
Removing
and
in
s
tallin
g valv
e
se
at i
nserts
.
In
stallin
g e
xhau
st
va
lve guid
es.
18
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I
tem
RE
PLACER,
guide
(intake
valve).
R
EPLACER,
oil
seal (magneto
dri
ve
dri
ven
sha
ft
ge
ars)
O D 2.120 in,
Igh 1 & in .
SC
REW,
puller,
%-16NC-2.
SCREW,
puller,
thd
%-20NF-2
for
5 in, Igh
over-all
6
in .
SLING
,
lifting
(crankshaft).
SL
ING, lifting
engine and
transm
ission)
STAND, tra
ns
port, engine
and
transmission.
ST
RAP, crank-
case tie rod Igh
5iS
in .
T O O L , extra
ct
ing,
heli-coil.
T O O L ,
inserting
,
tt-28.
Ide
ntifying
Number
41-R-2390-482
41-R-239
2-995
70837
40
41-S
-1044-125
41-S-3829-72
0
41-S-3
832-22
7083847
41
-S-5906-300
41-T-3
092-350
77
51060
Referenc
es
Fig.
J, 6,
57
M , 7
B ,
7, 37
C,7
N,
6,
28
9
P
,6,
23,27
G,7
FF,7
Par.
6 4
5
8
49,
56
53
55, 103
52, 6 9 ,
103, 105
6 4
6 4
Use
Installing
inta
ke
v
alve guides.
Installing
oil
seals in g
enera
tor drive adap
t
e
r
and
magnet
o
d
rive
ad
apter.
Removing
starter
drive adapter
an
d
gene
rator
drive
adapter.
Removi
ng
fly
w he
el.
Lifting
crank
shaft
and
crankshaft
as-
semhly
.
Lifting
eng
ine
and transmi
s
sion ,
or
engine
only.
Sup
porting e n -
g
ine
an
d t
rans
m
ission, or en
gine only.
Protecting
crank-
ca
se cylinder
pads whe
n cyl
inders are re
moved.
Extracting
heli-
coil
inserts.
Inserting
helicoil
inserts.
19
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Ite
m
WR
ENCH,
acces
sory
drive gear
h
ub nut
.
WRENCH,
crank
shaft
damper
counterwe
ight.
WRENCH
, crow
foo
t.
WREN
CH,
crow
foot,
cam
shaft
drive.
WRENCH,
crow
foot
sending
unit.
WRENCH,
c y
hold-dow
n
nut,
sgle-h
d box,
in sq d
ri ve,
dble-h
ex, size
of
opng
in,
Igh
21% in.
W
RENCH,
cyl
hold-down nut,
sgle-hd hex,
i
n sq dri ve,
dble-he
x,
siz
e
of o
png
in,
Ig
h 21%
in.
WRENCH
, engine
turning,
Igh
3
in.
WRENCH,
igni
tio
n
harness
nu
t, Igh
6 tV
in.
Identifying
Number
4
1-W-430-275
41-W
-870-50
70837
91
7083792
7083852
41-W-872
-710
41
-W-872-715
41-W-906-1
30
41-W-8
71-65
References
Fig.
J,
6 , 34
D , 6 ,
6 6
E,6,
100
N,
7
B ,
6 , 2
2
A, 6
J 7
E,
7, 13
Par
.
56,59
71,73
14
108
56,59
52
52
14
, 52,
105, 109,
132
36, 12
0
Use
Turning access
ory
drive gear hub
bearin
g nut.
Remo
ving
a
nd in
stal
ling crank
shaf
t damper
counte
rweight
pins.
Turnin
g
en
gine at
vertical
fan
drive shaft.
Tu
rning cam
shaft
housing pack
ing nut.
R
emoving and
in
stalling
sending
units a
nd
switches.
Turn
ing cylinder
barrel
nut.
T
urning crank-
case cross bolt
cylinder
barrel
nut
.
Tu
rning
engine
at
flywheel.
Turning ignition
harness nut.
20
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Ite
m
W
RE
NC
H,
im
pe
ller
nut
.
W
RE
NC
H, o
pen
end,
o
il c
ool
er
nut.
W
REN
CH
,
pul
l
ing
and
dr
ivin
g
impeller.
W
REN
CH
, in
ser
t
(
Ros
an)
1 4-2
8
to
%
-16.
WR
EN
CH
, in
ser
t
(
Ros
an)
&
-18
to
%-
13.
WR
EN
CH,
ins
ert
(R
osan
)
A-2
4
t
o
A-2
0.
WR
ENC
H,
ins
ert
(Ro
san
) %
-24
to %
-20
.
W
REN
CH
,
ins
ert
(Ros
an)
&
-20
to
%-
18.
WR
EN
CH
,
ins
ert
(Ro
san)
%-
20
to %
-16
.
W
RE
NCH
,
in
sert
(R
osan
)
%-1
8
to
1-
14.
W
RE
NC
H,
sp
ark
pl
ug
h
oldi
ng,
Igh
6
in .
WR
ENC
H,
s
park
plug
i
nse
rtin
g
th
d opn
g
in
-
24N
EF
-2,
Ig
h
5
in
.
I
dent
ifyin
g
Nu
mber
4
1-W
-15
36-
235
7
0837
38
41-
W-
1536
-24
0
41
-W-
153
6-3
90
41-
W-1
536
-39
1
41-W
-1
536-393
41
-W-
153
6-39
6
41
-W-
153
6-39
9
41
-W-
153
6-40
2
4
1-W
-15
36-
410
4
1-W
-87
1-75
41-W
-3
306-
500
Refer
ence
s
F
ig.
D
D, 7,
51
C
,
6
E
E,7
,
32
W
,
7
X
,7
Y,7
2,7
A
A,
7
B
B,
7
CC
,7
D,
7,
13
P
7
'
1 09
Pa
r.
56
, 58
,
5
9
36,
1 23
56,5
9
57
57
57
57
5
7
57
5
7
3
6
1
20
U
se
Turn
ing
s
upe
r
ch
arge
r i
mpe
l
l
er n
uts
.
Tur
ning
oi
l co
oler
line n
uts.
Pul
ling
and
d
riv
ing
s
upe
rcha
rg
er
impeller.
Ins
tall
ing
R
os
an
ins
erts.
Inst
alli
ng
Ro
s
an
in
sert
s.
In
stalling
Ros
a
n
inse
rts.
I
nst
allin
g
Ro
s
an
ins
erts
.
Inst
alli
ng
Ro
s
an
ins
erts
.
In
sta
lling
Ro
s
an
inse
rts.
Ins
talli
ng
Ros
an
in
ser
ts.
Hol
ding
s
pa
rk
p
lugs
.
In
stal
ling
spa
rk
plu
gs.
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Item
WRE
NCH, start
er
jaw
brg
nu
t.
WRENCH, tubu
lar, dble
end,
hex,
size of hex
opngs 1.653
x
1.91
5 in,
Igh
6 in.
Ide
ntifying
Number
41-W-545-15
41-W-3
727-33
References
Fig.
Q, 6, 40
S, 6, 15
Par.
58
36, 56,
59
Use
Turning
st
arter
ja
w bearing
re
taining
nut.
Rem
oving and in
stalling
oil
con
tro
l
valve
s.
2
2
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CHAPT
ER 3
TROUB L E
SHOOTING
S ec t i on
I.
G ENERA
L
11.
Pu r p o s e
Information
in this cha
pter is for use of ordnance mainten
ance
pe
rsonnel in conjunction
with,
an
d as a su
pplement to,
the
trouble sho
oting
section in
the pertinent opera
tors man
ual. It
p
rovides
the
continuatio
n of
instructions
where
a
re
medy in the operat
ors manual refers
to ordnance
m
aintenance personnel
fo
r
corrective actio
n.
Operation
of a deadlin
ed vehicle
wit
hout
a
preli
minary ex
amina
tion can cau
se
fu
rther
d
amage
to a disab
led
comp
onent and
pos
sible
inju
ry
to per
sonnel.
By careful inspe
ction and
trouble
shooting
such damage
and
injury can be avoid
ed and,
in
addi
tion, the causes of fa
ulty o
peration of a v
ehicle
or
compon
ent
often
can
be
determined
without
extensive
disassembly.
12.
G ene ra l In s t r
u c t i o n s and Pr o c e d u
res
This ch
apter contains
inspec
tion
and
trouble shooting
pro
cedu
res to be performed
while a disabled
engi
ne is
still m
ounted
in the
vehicle
and
also after it
has been removed
.
T
he
inspection
s
made whil
e th
e
engine
is mounted in
the
vehicle
are
for
the
most
part
visual and
are
to
be
performed
before attemp
ting
to operate the
vehicle. The obj
ect
of
these in
spe
ctions is to avoid
possibl
e
damage o
r
injury
a
nd also to deter
mine t
he
condition
of and
, when possible
,
what
is wrong w
ith
the defec
tive
engine.
The trouble
shooting
performed
while th
e
engine
is mounted
in the v
ehicle is
that
w
hich is
b
eyond
the normal scope of u
sing
organ
ization. Check
the trouble sho
oting
section of TM
9-730
or
TM 9-761A to
be sure the tr
ouble is not a defec
t norm
ally
cor
rected by
the using organ
ization; then
proceed
as
outlined
in
t
his ch
apter. These tro
uble sh
ooting
operations
are
used to deter
mine
if
th
e
fault can
be r
emedied w
ithout removin
g the engine
from the
vehicle
an
d
als
o, w
hen
sub
sequent
removal is necessary,
to
indicate when
repair can
be
made
w
ithout
complete
disassembly
of
the engine
.
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c.
In
spection
after the
en
gine is
removed f
rom the vehic
le
pe
rformed to
verif
y
the di
agnosis made when the e
ngine
was
in
the
vehicle, to
uncover furth
er
defects,
or to determin
e fau
lts
if
the engin
e alone is
received
by the
ordnance establ
ishment. This
insp
ection
is particularl
y imp
ortant
in the
last
case
because
it is
often the
only
mea
ns of de
termining the
trouble
without com
pletely disassem
bling the
engine.
Tro
uble
shooting
a d
isabled
engin e
af
ter
it has
been re
moved
from
the veh
icle
consi
sts
of subjecting it to te
sts on a
dyn
a
mometer.
This chapter
discusses those
symptoms
w
hich
can
be
diag
nosed byusing the
testing
e
quipment a
nd interprets
t
he re
sults
in
terms
of
probable
ca
uses.
Sec t i on
I I . ENGIN E
13.
G e
n era l
M ost e
ngine troubles
act
ually are accessory troubles.
Normally
the p
ertinent operators'
manual will cover trou
ble
sho
oting
of
all engin
e accessories while
mounted
o
n the engine
. This section
covers only
th ose
troubles
w hich
can
develop
within
the
engine
itself.
1
4.
D
eta i l Pr
o c edures
When
an engi
ne cannot
be turned over
by
hand
o
r w
ith
th
e starter, seizu
re
of
par
ts
or h
ydrostatic lock
below)
is the
cause.
It
is
d
ifficult
to
i
solate or sp
ot seizure
because the power
section and th
e
a
ccessory
case are con
nected by
a
splined
shaft
w hich
can only
be
removed when
these
tw o
assem
blies a
re
se
parated.
It
is
ther
efore necessary to d
etermine
if
seizure is in th
e power section
or the accesso
ry case by checking
g
ear backlash
.
Using
engine turning wre
nch 4
1-W-906-130
(fig.
7), r
ock
crankshaft forw
ard
and backwa
rd to
see if there is an
y
m
ovement.
If there is no
movement,
investigate for
hydrostatic
lock,
froz
en pistons,
or seized bearin
gs in the pow
er section. If
there
i
s norma
l
mo
vement, sei
zure is probably in
the
ac
cessory
case.
Using
engine
turning
wrench
7083791 ,
turn
the
engine
at
the fa
n
drive
vertica
l
sh
aft forwar
d and back
ward and note
mo
vement of
gear trains in the ac
cessory case. If wr
ench 7083791
is not
available, a wrench
adapte
r
made to
fit the power take-of
f
d
rive
shaft (fig. 10) may be
used.
Remove cam
shaft gear housing
cov
ers and che
ck gear m
ovement for
backlash. B y a systematic
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elimination of accessory
ca
se
drives,
the
seizure
m
ay
be
traced
to
the
main
accessory
gear
train. Remov
e the accessory
case
(par. 5
1) and perform
the
necessary
repai
rs.
Caution
Exercise great
care
in
deciding
what
inspection
and
repairs m
ust be performed. Pa
rts
in
the
no
nseized section
may
be
strained
or
bent
and require
replacement,
or
presence
o
f
chips
may re
quire
a
compl
ete
tear
down and clean
ing of
the
engin
e
lubricatin
g system.
G
ear
and drive shaft failures
generally
can
be
isolated
by a
systematic
check
of the affected gear
train
.
Methods
of locating
these failed
gears are co
vered u
nder
the
ind
ividual systems. G
ear
failure
repairs
frequently
can be con
fined
to
replacemen
t
of the damaged
parts.
Caution
Exercise great
care in deciding
what r
epairs m
ust
be made
.
Disassembly
a
nd
c
leaning of part
or all of the engine
ma
y be
necessary
due
to chip
s gett
ing into the
engine
lu
bricating
system
or moving parts.
Engine
n
oises
can
b
e
cau
sed by w
orn,
broke
n
or
improp
erly
adju
sted pa
rts
((4) belo
w ) and by lack
of lubri
cation
b
elow).
Ability
to isolate
tr
ouble
causi
ng a noise
is
a
matter
of
e
xperience. When
noise occurs, shut
the
engine
down
im
mediately for
inv
estigation. S ome
of the
more
commo
n noises
an
d
th
eir
causes are:
(1)
Turn
the
engine
by hand
. If
it
is
som
e
w
hat
tig
ht and
the grinding pers
ists,
a
bush
ing
or bear
ing pro
bably is failing
. Refer
to
above
.
(
2)
A
def
ective
valve rocke
r or
in
correct valve clearance
will
pro
duce this s
ound.
Start
the
engine
and
listen
thro
ugh a
short piece
of
pipe
press
ed against the
rocke
r
covers. The
tapping fr
om
the
defective
u
nit
will
be
much shar
per and
louder than
fro
m the others.
(3)
This noise
is
caused by the
counterwei
ghts
o
f
the
cr
ankshaft vibra
t
ion
damper
and is
a norma
l noise. It
will disappea
r
at
higher speeds.
(4)
Too much radial c
learance.
Worn
or
cracked
m
ain
and connecting
rod bearing
s.
Too much
crankshaft
end play. Th
rust flanges on
bearin
g worn.
(c
) Too much
connecting
rod end play. T
hrust
faces
worn.
Sprung or bent
connecting rods.
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NOTE:
WRENCH
ADAPTER
I S SPLINED
TO
FIT
POWER-TA
KE-OFF
DRIVE SHAFT.
FULL
FILLET
0.028
APPROXIMA
TE
RAD
IU S
0.0805
0.0 78
5
CIRCULAR WIDTH R E
F )
POWER
TAKE-OFF
DRIVE
SH A
FT SPLINE
RA
PD 155880
(1)
Most ignitio
n system
defects
are
covered
in the pertinent op
erators
manual.
However,
failure
or
seizure of
one
or more
gears in the magneto
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drive trai
n would cause either
or both
magnet
os on
the engine
to sto
p
turnin
g.
(2)
Remove
the magnetos (par.
36/0 and rotate
the engine with the
turning
wrench 41-W-906-130
(fig.
7).
If
the engine w
ill not rotate, ref
er to above.
I
f
one
magneto driven
idl
er beve
l
gear fails
to rotate,
the gear must be
damaged. If b
oth
driven
gears fail to
rotate,
see
whether
the
other accessories
rotate and
use
the
following procedure:
Remove
accessory
case (par. 51) and
locate the da
maged
gears or shaft.
Before repairing damage, r
efer to above.
Remove
the
magneto drive
housing cover
(par.
and inspect the
gears. Ro
tate
the
engine and see
whether
the
magneto idler
drive
beve
l
gear
(HH) (
fig. 44 ) is turning with the
m
agneto drive
n
bev
el
gear with
integral shaft
(EE).
If the driven
bevel
gear
with integral
shaft
does not
rotate, remove the
accessory case (par. 5 1)
a
nd
in
spect for failure
in
the
accessory
case
ge
ar train.
Be
for
e repa
iring
or
replacing da
maged
gear, refer to
above.
(1)
M
ost
fu e
l system
defects
are
covered in the
pertinent operators manual.
A
failure
in
the gear
train
wil l
result in n
onoperation of the
fuel
p
ump.
(2)
(fig. 45).
Remove
the
fuel
pu
mp (par. 36/)
from
its adapter. Inspect
the fuel
pump
bevel
gear
(T) a
nd
see if it
rotates with the
engine, with other
accessori
es,
and
with the governor.
If the gear does
not
rotate,
remov
e
th
e fu el
pump
drive
adapter (AA)
(par. 58e)
lift out
th
e
gear
and l
ook for
ge
ar failure.
If
the
gears
are n
ot damaged, see whether the
fuel pump
and
governor
d
rive
bevel
gea
r (BB
)
rotates. I
f not,
remove the
camshaft drive housing (par.
5 6 d )
and
check
for
gear
failure. If
failure
is still
not found, rem
ove the
accessory
case (par. 51) and check the
accessory
gear
train. Refer
to
above.
/.
(1)
Most ind
uction
system diffi
culties are
covered
in
the perti
nent
operators
manual.
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Difficulties not covered therein
and the
m
ethods of lo
cating them are
listed below.
(2 ) Remov
e the valve rocker
covers (par.
45)
and examine the
camshafts and ro
ckers
for d
amage.
Follow whiche
ver
of
the
followin
g conditions ap
plies.
If
the camshaft
is
damaged ,
do
whichever
of
the fo llowing applies.
Repair o
r
replace
damaged component.
Repair or replace damage
d
component. Ins
pect rocker roller for freedom
of
ro
tation and damage. Replace
any defective rocker.
R eplace with
new camshaft.
Replace
the
damaged
rocker
assem
bly.
Inspect th
e
correspo
nding camshaft lobe
for
dam
age,
and repair or replace
camshaft as necessary.
Check for
a stuck valve ((c) below),
and for
clogg
ed
lubricating
passages to the rocker roller, if fro
zen.
(c) Turn
the
engine with
the turning wrench
41-W-906-130
and ob
serve
if
all valves open
and
close sati
sfactorily.
Ch
eck compression
below). If
any
valves
are
stuck
open,
it
will
be
readily apparent.
R
emove
the cylinder (par.
52)
and
make th
e
neces
sary
repairs an
d
p
arts
replacemen
t. A stuck val
ve
often
will
damage the
rock
er
and so
metimes the
cam
shaft.
Inspect
the
rocker and camshaft to
the
lim
its
specified
in repair
and
r
ebuild
standards
(pars. 149,
1
50,
and
163 ) .
Turn
the engine with the
turn
ing wrench 41-W-906-130
(fig.
7)
and
observe
whether the camshafts rota
te.
If
they do not, remove
t
he
camshaft
gear housing covers
(par.
47)
and ex
amine the gears
for d amag
e.
If
they
are
all right,
remove the camshaft drive shafts
(par.
47) and
in
s
pect for damage. If
the drive shafts are
all right,
remove the accessory case
(par.
51 )
and
loc
ate
the
damaged
gears. Before repairing or
replacing dam
aged
gears, refer
to above.
(1) Most defec
ts are covered
in
the pertinent o
perators manual. Other difficulties are
fai
lure or seizure
in the
gear
train
.
(2) Turn t
he engine
with
the turning wrench
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41-W-906-130.
If
it cannot be turned, refer to above.
If it
turns, attempt
to
crank
e ng i n e
with starter. If
the
entire e ng i n e
does
not crank, r emove the starter
(par.
36d) and starter drive assembly
(par.
560)
from
the
accessory case and examine acce s so ry
case
for damage
to the
starter
gears.
If
defec t ive
gears are
indicated,
remove the accessory
case
(par. 51) and
loca te
the dam
aged gear. Before repairing or replacing any gear, refer
to above.
S t o p e ng i n e
and proceed
as in
below. If that
is not
the cause, trouble shoo t
as
outlined in the
pertinent operators manual and in
and
/
above.
Trouble shoo t as ou t l i ned
in
the
pertinent
operators
manual
and
in
and
/
above.
Refer to pertinent operators manual
and
to
and
/ above.
Proceed as
in above.
(1) One
cause o f
bearing failures
is
the presence
in the
oil o f
dirt, sand or meta l l i c
parti
c les resulting from valve grinds or cylinder
recondition
ing. Make
the
checks
outlined
in
the
pertinent
operators
manual . If the trouble is not i solated, proceed as in (2)
below.
(2)
Obstructed oil
galleries,
oil screens ,
or oil pumps , or burned out main rod or camshaft
bearings could
cause
this cond i t i on .
If the
obstructing
material in the oil gallery is something
that might
be
circulated through the eng ine , rebuild the entire
en
g i ne
otherwise,
r emove
the obstruction. If worn parts
are the cause, rebuild the
eng ine .
One
or
both
oil
pumps may not be operating properly. This is an
other cause o f
l ow
oil
pressure.
Check
the
pumps
for
security o f mounting and
for
impeller wear
and
in
ternal
defec t ive
parts.
Replace pumps
if
necessary.
Also,
check
for
damaged internal oil l ines, for crank
shaft
oil
plug
defect ,
and
for
defec t ive
0
ring
gaskets
o n
oil transfer l i nes .
Make a careful
diagnosis
to determine whether a comple t e
engine rebuild
is
necessary or an overhaul
o f on ly
one cylinder, piston
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ring,
or
pi
ston
is
req
uired. Ex
cessive
oil
consum p
tio
n
may be caused
b
y:
Badly wo
rn connectin
g rod
or main or
camshaft bear
ings
. This
allows too much
oil lea
kage or th
row-off
from the e
nd of the
be
arings.
External
oil
leaks
at
the
front
and
rear
main
bearings.
Faulty be
aring or oi
l
seals lea
d
t
o
this conditio
n.
D
efective
piston
rin
gs or worn
cylind
er walls.
Commo
n
troubl
e
suc
h as
im
proper igni
tion timin
g, lean
car
buretor mixtures,
off
spec
ificatio n fuel,
dirty oil fil
ter and oil c
oolers,
o
r d
e
fective
con
trol
v
alves
should
be
thor
oughly
i
nvesti
ga
ted. Othe
r
causes
of
o
il
h
igh
temperatu
re
c
ould be
restrictio
ns or
defec
ts in
the
oil cooling
or
engine
co
oling
system
or
the
oil circula
ting system,
high
oil
flow du
e
to
a
damaged
c
rankshaft
oil
pl
ug,
broken
intern
al
main
oil lines, defectiv
e beari
ngs,
etc.
I
nspect
f
or cooling
fan
dam a
ge
below),
for o
il
pump
defect
s
a)
above),
and f
or d m g
ed or wor
n
bear
ings an
d
oil
seals.
Rep
lace worn
or defective
pa
rts.
Oil high
pres
sures norma
lly result
f
rom o
il
low
tem
peratures,
high
v
iscosity
o
il,
clogged
oil filter,
or defective
or
impro
per
sett
ing
o
f the o
il
pre
ssure
r
elief
valve.
A r
estriction
in
the
oil
passa
ges,
or
bu
rned
bearings
could
cause
this
c
ondition.
If the
obstructi
ng ma
terial
in
the
oil passages
is som
ething
wh
ich m
ight be
c
irculated
through t
he engine, a
com
pl
ete
cleaning
and re
build
will
be
required
. If
bu
rned
or dama
ged
p
arts are
the cause, re
build the eng
ine.
If tests
in
the pertinen
t operators
manual
do
n
ot isolate
the tro
uble,
see
w
hether
the
generator
drive
bevel gear tur
ns when
the
engi
ne
is
cranked. f
it do
es
not
turn
,
rem
ove
it for inspection.
f dam
aged,
repair or
replace par.
58c).
If
the gear
is
all
right, r
emove the accesso
ry
case par.
51) an
d
in
spect fo
r failur
e
in
the
ac
cessory
gear
train
. Before repa
iring
or replacing
an
y dama
ged
ge
ars
refer
to
above.
1 )
I
f tests
in the
pertinen
t oper
ators
manu
al
d
o not isolate
the
tro
uble a
nd there
is
no
visible da
mage,
lo ok for a
failure
in
the
impell
er
drive
gear
train
in
the acce
ssory cas
e.
Use
the
following
pr
ocedure.
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(2)
Rem
ove
acces
sory
ca
se
par.
51)
and
lo
cate th
e dam
age
d gea
rs
or shaf
t. Be
fo
re
rep
airin
g
dam a
ge, refer
to
abov
e.
Rem
ove
carb
uret
or elbo
w
par.
50)
and
inspect impeller
through
the
opening in
the s
uper
charg
er
housi
ng.
R
otate
the
e
ngin
e and
see
wh
ethe
r
th
e
im
pelle
r
t
urns
. If it
tu
rns,
lo o
k
for an
ob
s
truc
tion
or ba
d leak
in the
i
nduc
tion sy
ste m
.
If ne
ces
sa
ry,
re
m ov
e
th
e sup
erch
arge
r
ho
using
pa
r. 56
6)
and e
xam
ine
care
fully
for def
ects.
I
f
the i
m pel
ler do
es
no
t t
urn w
ith
the
en
gine,
remo
ve the
acc
esso
ry ca
se
par.
5
1)
and
insp
ect for
gea
r or
s
haft fa
ilure
. Be
fore
repairing
or replaci
ng
any d
amag
ed
gear
refe
r to
ab
ove. Ch
eck
par
ts to
limi
ts sp
ecifi
ed in
re
pair
a
nd
re
build
s
tanda
rds
p
ar. 1
48).
(
1)
M os
t coo
ling sy
stem
defe
cts
a
re cov
ered
in
the
pert
inent
op
erato
rs
man
ual. A
failu
re
in the
fan
dri
ve
gea
r
tr
ain
w il
l
resul
t in nono
perat
ion
of the
fa
n
and
lead
to cyl
inder
a
nd e
ngine
oi
l hig
h
tem
pera
tures
.
(2)
R
em o
ve
th
e
cooling
fan outl
et
vane
hou
sing
Q, f
ig. 17
) and
exa
mine
the
fan
roto
r for
dam a
ge.
Not
e if the
r
otor is
f
ree
to
tur
n in t
he
fan roto
r h
ousin
g.
Tu
rn the
engin
e
w
ith t
he
tu
rnin
g wren
ch 41
-W-9
06-1
30
fig .
7). If
the
e
ngin
e w ill
no
t
tu
rn, re
fer
to
abo
ve.
If the
fan roto
r
does
not
ro
tate,
see
if
o
ther
acc
essor
ies
r
otate
and us
e th
e fo
llow
ing proc
edure
:
R
emov
e t
he
a
ccess
ory
case
par.
51)
and
locate
the
damaged
gears
or
shaft.
Be
fore
re
pairi
ng
dam a
ge, ref
er to
abov
e.
Remo
ve the
fan
and c
lutch
as
semb
ly and
see
if the
fan
driv
e
ve
rtica
l
shaf
t
rot
ates.
If th
e s
haft
doe
s not
rot
ate,
rem o
ve th
e fa
n dri
ve
oil
seal
hou
sing
par.
5
4b) an
d b
earin
g h
ousi
ng p
ar.
5
4c)
from
th
e
crank
case
flan
ge a
nd e
xam
ine th
e beve
l
gears
and
shaf
ts. If
t
hese
gear
s do
not
rota
te, the
fa
ilure
is in
t
he a
cces
sory c
ase.
Rem
ove
the
acces
sory
case
par.
51)
and
locate
the
dam
aged
gears
or
shafts.
If the
fa
n
d
rive
shaf
t doe
s r
otate
, th
e failu
re
is
in
the
co
oling
fan
and
fan
clu t
ch a
ssem
bly fig
. 7
3).
Dis
assem
ble
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the fan and fan
clutch
assembly (par. 76)
and
examine
the bearings. Examine the friction disk
and
pressure
plate.
If
failure
is in the
bearings,
friction disk,
or
pressure
plate,
examine all parts
carefully,
as the ex
cessive
heat
generated
by
these
failures
may affect
related
parts.
If
failure
is
not
in
the
bearings,
disk,
or plate, examine
clutch
balls
and
springs.
Inspect
clutch drive
hub,
fan rotor and
adapter,
and
both
parts of
clutch housings.
Hydrostatic l ock can
be
detected by re
moving o n e
spark
plug
from each
cylinder
and noting if there
is any evidence
of
gasoline in the cylinders.
If there
is n o liquid
present and the
crankshaft
cannot
be rocked back
and forth with
the engine
turning
wrench
41-W-906-130
(fig.
7),
l ook
for
se ized
pistons or
bearings
above). If there
is gasoline present, rotate
the
crankshaft with the
switch
in
the
OFF
position,
to displace
the
liquid. Turn
the
engine over
several
times to be
certain that all liquid is removed and
that
n o internal
parts
have
been damaged. It
is possible to damage connecting rods, pistons,
and cylinders
by attempting
to start an engine in the hydro-
statically l o cked
condition.
Inspect
for
damaged
parts.
Compression
pressure at cranking speed
should be
90 to 110 psi with a differ
en c e of
not more
than
15 psi between cylinders. Low or
widely
varying pressures can
be
caused
by
burned, warped, or stuck
valves,
or
by
worn
piston rings
or
cylinders. R e m o v e valve
rocker
covers (par. 45) and inspect for
stuck
valves (/
(2)(c)
above).
If valves are not defective, disassemble and inspect cylinder (pars.
63 and
64)
and piston
(pars.
66 and 67).
Repair or
replace
worn
o r
defective
parts.
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CHAPTE
R 4
ENGINE
Sec t i
o n I
DESCRIPT
ION AN
D
DATA
1
5 Lub r
ica t io n Sys t em
Two positive displ
acement
pum
ps
supply oi
l
to
the lubri
cating sys
tem.
One is a
combinatio
n scavenger an
d
pressure
p
ump. The ot
her i
s a
sc
avenger
pump. Th
e combi
nation pump
is
incl
osed in
a single
housing
and
is
sec
ured to
a
mac
hined mount
i
ng pad
located
on the
lower w
eb of
No.
2
main
bea
ring in the
cr
ankcase. T
he oil for
the
pressure
pump is
entirely inclos
ed in
a reserv
oir formed by
the oil pa
n p
artitions
an
d
the baffle p
late
assemb
ly. The
sca
venger pum
p, or top h
alf of th
is
c
ombinatio
n
unit, tran
sfers
oil fr
om the flyw
heel
end
of
the oil p
an to
the
pressure
pump
reservoir.
The
separate
scavenger
oil
pump,
lo
cated
on
a
mach
ined pad
on the lo
wer side of
the acce
ssory case,
tran
sfers oil fro
m t
he
ac
cessory
case oil sump
to th
e pressu
re
pu
mp rese
rvoir. Th
e two scavenge
r pu
mps const
antly transfer
oil
from both en
ds of
the engin
e.
Thi
s assures
the p
ressure pump
an a
dequate su
pply of oil
wh
en th
e
v
ehicle
is on grade
s. In
no
rmal
oper
ation, th
e oil passes
from the
pressure
pum
p
through
pa
ssages
in th
e
cran
kcase an
d ac
cessory case to
the oi
l control hous
ing
assembly
B, fig.
35).
t
then
passes
through
external
lines
to
the eng
ine oil cool
er and
retu
rns
to the in
let of the o
il
c
ontrol
housi
ng and to
the accesso
ry case. Oil
flow is
controlled
by
four
valves.
The oil
pressure con
trol val
ve, the oil c
ooler by-pass
valve,
and
the oil filter b
y-pass valv
e
are
loca
ted in
the oil contro
l hous
in
g. A
fourth
val
ve,
the oil cooler
by-pass v
alve
thermos
tatic),
is
located
on the engine
oil c
ooler.
Th
e oil cool
er
b
y-pass
valve
thermos
tatic) perm
its oil to
by-pass
the
oil
coolers
whenever
oil
temperature
is below
185°
F.
Th
e valve
also opens
to
by-pass
oil whenever
there
is a pr
essure
dif
ferential
of greater t
han 6 0 po
unds.
Normally
,
the
val
ve is
open to
by-pass.
As o
il te
mperature
increas
es, t
he
valve
closes.
This forc
es
o
il to circu
late throu
gh th
e
oil
co
oler an
d en
ter the
oil
control h
ousing a
nd the
engine
oil fil
ter.
I
f oil
tempera
ture
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S
C
A
V
E
N
G
E
R
P
U
M
P
U
T
E
T
U
N
6
P
R
E
S
S
U
R
E
P
U
M
P
D
R
I
V
E
S
H
A
F
S
C
V
E
N
G
E
R
P
U
P
L
I
N
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is
above 185°
F.,
and a pressure differential of
greater
than
6
0
pounds is built up, the valve
opens.
c. The
oil pressure
control
valve maintains
desired oil pressure
in the oil
cooler and engine oil p
assages by
allow
ing a
relief open
ing
to the sump
.
Limit
ed
adjustment of
the
valve is p
ossible (pars.
82 and 129). Excess oil
is by-pas
sed
directly to the accesso
ry case
sump through a
spillline.
The
oil
filter by-pass valve is
a spring-balanced
type valve.
Should the
filter bec
ome
obstructed, the valve will
open when a
different
ial
of
50
psi is
r
eached
and
oil will b
e de
livered
directly
to
the
engine
th
rough
the
oil pressure control valve.
The oil
cooler by-pass
valve is a spring-balance
d type valve
and
by-passes
oil
in
the
control housing when
there
is
a
restric
tion in
the
engine
oil
cooler or
external
line
s.
N
ormally
closed,
it opens under
a pressure differential
of 50
psi.
/.
Direct pump
pressure
is carried throu
gh
a larg
e
drilled pass
age from
the outlet
side
of the
pressure
oil pump, through the
crankcase
and
accesso
ry case
,
to the oil contro
l housing on the
top
corner
of
the accessory
case,
right
(1-3-5)
side.
Drilled
passages
prov
ide
lubricat
ion
to
the
acc
essory case and
main oil
pas
sages in each side of the
crankcase. Dr
illed
passages
through
the cran
kcase webs supply
oil
to the
main bearings. Oil passages
from each
crankshaft
journ
al provide lubrication to the c
on
necting rod
journals and
bearings. Cy
linder bores, piston
rings,
and piston
pins
are lubricated
by oil
thr
own fr
om
the connecting
rods.
Connecting passages
in the acc
essory
case supply oi
l to the
hollow camsha
fts through drilled
passages
in the camshaft dr
ive
shafts. Drilled
holes
in
each camshaft
journal convey oil through
connecting p
assages to the rocker sh
afts, rocker
arm
bearings
and
rollers.
Throw-off
oil lubricates the
intake valve
ste
ms.
Lubrication is supp
lied to the exh
aust
valve
stems
by oil
streams
from
d
rilled passages in the camshaft
bearings.
Externa
l
oil-
drain manifolds return oil from t
he cylinder
heads
and
camshaft
gear housings to the
oil
p
an
and
accessory
case
sump.
16.
Hydrau l ic
Governo r
The hydraulic
governor maintains engine
speed below pr
e
determined l
imits regardless
of
engine
load. Refer to
paragraph
135
for additional description
of the hydraulic governor.
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O
O
O
M
O
H
N
O
N
G
N
O
O
O
O
G
O
O
O
O
O
M
N
N
S
G
G
O
O
O
O
G
N
D
O
O
M
O
G
O
M
O
L
O
M
O
O
W
O
O
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17.
Crank
c as e
and
Oil
Pan
a.
The crankcase (fig. 65) is a
two-piece aluminum-alloy cast
ing.
The
two halve
s, ri
ght
(1-3-5) s ide
and left (2
-4-6)
side,
are
sp
lit vertically
a
long
the
center of the four main
bearings
to allow
for
installing the
crankshaft. The halves are bo
lted
to
gether. There
are
12
special long
cross bolts
through
the
four
transverse main
b
earing web s .
The
bolts
are shouldered
at
three
points to preve
nt bearing misalinement.
Eight
o
f these
bol
ts pro
trude through holes in the
cylinder mounting f lang
es
on
both
cylinder
banks and help secure the c
ylinders
t
o the crankcase
.
There are
also three spec
ial
dow
el-type bolts which help secure the
tw o crankcase ha
lves and prevent misalinement
of
th
e
m
ain bear
ings. The two ba
nks of horizontally-opposed
c
ylinders
a
re
mounted
on
machine
pads
on
each
crankcase half.
The
engine
c
ooling fan is mounted
on
the centr
ally located flange
d
portion o
f
the crankcase.
A n oil
passage
is
cored into each half of the
crankcase
ca
st
ing. Passages also are drille
d through the crankcase webs to the
main
bearings
.
Passa
ges
also
supply
oil to the oil control
hous
ing, accessory
case, and cooling fan drive
shaft housing.
c. The crankc
ase
oil pan (fig.
88) is an aluminum-all
oy casting.
It
is
partitioned
to
form
a
reservoir for
the
pressure
pump.
A
plate incloses the top of the reservoir
and is sealed to the pum
p
body with an 0
ring
gask
et,
to
prevent splashing of oil and
entrance of air.
The accessory case oil
sump
is
an aluminum -
alloy casting
with
out baffles
and
is
bolted to
the
accessory
case
and
the
crankcase oil
pa
n (fig.
80).
18. Main B ear i n g s
The
four
replaceable main bearings
(fig. 65) are of the s
plit
precision typ
e.
They
are
st
eel-backed
and faced with a special
beari
ng alloy.
The No. 3 bearing is double
flanged with
bearing
m
etal
to
take any crankshaft thrust
and to control
crankshaft
end
play. The
bearin
g halves are identica
l. Each has a
tang
at
the
joint to preve
nt rotation in the crankcase
bore. The oil holes
drilled through the bearings
register
with an o
il groove cut in
th
e
bearin
g bore of the cr
ankcase. The bearing
faces
hav
e annular
grooves
which
register
with the
oil
holes
in th
e
crankshaft
journals.
19. Cra n ksh a f t
The crankshaft (fig.
65) i s a
steel
forging. It has four
ma
in bearing journals,
six
crankpin
s (in pairs),
and
an
integrally
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forged f lange on o n e end for
mounting
the
f lywheel .
Crankpin
pairs are
positioned
120° apart, with the crankpins
of
each pair
180° apart.
All
crankpin and main bearing
journals
are bored
to
reduce
weight.
Oil holes
are drilled at
an
angle
t o c o nne c t
the main
bearing journals
and
the crankpin journals.
The
diagonally
dril led
holes are
con n e c t e d
with s teel
tubes.
Thus,
oil is conveyed from
the
main
bearings to the main
bearing
journal, through
the crank
cheek, to the crankpin and to
the
connecting
rod bearing. A
pressed-in oil slinger is
loca ted
in the number-one-main-bearing
journal
bore
to pick up oi l thrown by
the number-one rod
and
provide
lubrication
for
the
crankshaft
vibration damper
and
ac
cesso ry drive shaft spl ine .
The crankshaft
and the f lywheel are individually balanced,
statically and dynamical ly, by the manufacturer.
A f langed
hub
is installed permanently o n the
accesso ry
end
o f the crankshaft for mounting
the
pendulum-type vibration
damper which restricts
the extent
o f the crankshaft vibrations.
The crankshaft vibration damper
(fig.
70)
cons i s t s
o f four wedge-
shaped damper counterweights, each suspended
o n t w o pins sup
ported
in
holes
in
the f langed hub.
The f lywheel
has
a torsion
damper hub (fig. 24)
through
w hi c h
the transmission shaft is driven.
The damper
consists
o f
an internally spl ined hub
mounted
o n a
plate
which
is
spring
driven
by the
flywheel.
The damper
reduces
torsional shock o n
the
transmission input shaft.
20.
Connec t i ng Rods
and Bear ings
Connecting rods (fig. 64) are I
sec t i o n
type,
with
tapered
shanks.
They are
machined from
steel
forgings.
Bronze p i s t on
pin
bearings are pressed
into
the
smal l end o f each c o nne c t i n g
rod. The bearings are
diamond-bored
to f in ished size
after
be ing
assembled
in
place.
There
are t w o
diagonal
oil
grooves i n
the
inner
diameter o f the bearing.
Oil enters
a
well ,
drilled
in
the
smal l end o f the connecting
rod,
and f o l l ows annular grooves to
lubricate
piston pin
bearing,
piston
pin, and
piston pin boss.
C o nnec t i n g
rod bearings are o f the split-precision type, steel-
backed with a special bearing alloy face. Bearing halves
are
identical and
are
prevented from
turning
in
the
rod bores
by
means
o f a tang o n
the
split
face
o f
each
half.
21. Pis tons Pins and Rings
Pistons (fig. 64)
are
of the forged-aluminum solid-skirt type.
The piston skirt i s cam ground and tapered (when cold) to pro-
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vide
accurate fit in the
cylinder
a
t
o
perating
temperat
ure. The
pistons ar
e
reinforced with
piston pin bosses
which extend to the
crown
of
the piston.
Pistons have four rings. The
top two
rings
are com
pression
rin
gs,
and
the third
and
fourth rings
are oil
c
ontrol rings. The
compression
rings
are
chrome-faced.
Pist
on pins are tubular and
full-floating. Domed aluminum
plugs
are
inserted
in each end
of the piston
pin
to center
the pin
and
to prevent scoring
or
da
mage to the cylinder wal
l.
22 ylinders and
alves
Each cylinder (fig. 60) is a separate unit.
The
cylinder
barrel is
an alloy-steel
shell
around which
an aluminum muff is
cast,
f inned
for
air-cooling.
A finned
cast-aluminum cylinder
head,
interna
lly
threaded, e
ngages external threads
on the
cylinder
barrel.
The assembly is made perma
nent
by
shrinkage fit. The
valve (seat) inserts are
installed in machined
recesses in the
head by heating the cylinde
r head
and
cooling the inserts. T
he
inserts may
be
r
emoved
for repla
cement
b
y
us
ing a spec
ia l re
mover kit
41-R-2371-465
supp
lied for that p
urpose (par. 64)
(fig. 8). Valve
stem
g
uides
are
bronze and are
replaceable. An
outer
extension
of
the cylinder
head
forms
a
recess or rocker
box,
in which
the valve
spr
ings, rocker
arm
s, and
rocker shafts
are
located. The
cylinders are arranged in
two
ban
ks, numbere
d
1-3-5 and 2-4-6 from
the accessory end.
Flanges, containing
14
stud
holes,
mount
each
c
ylinder
to
the crankcase.
One
aluminum
camsha
ft bearing cap
and one
valve rocker
shaft bracket
in
ea
ch
cylinder
hold
the
rocker
shafts an
d
valve
rockers.
The
cap
and bracket
are doweled and
bolted to the
cylinder
head, and th
e
cam
shaft
bearing
is
bored
with
the
cap
in place.
Therefore,
caps
are not
interchangeable and
must
re
main as part of
the cylinder assembly. Counterbores
in
t
he rocker
bo
x
walls and covers
accommodate the
camshaft
intercylind
er
connectors (f ig. 21)
.
The valve stems
extend into the rocker b
oxes.
Three springs
,
compressed
between
retainers
and secured
to the valve
stem
by
split,
cone-s
haped
locks, ho
ld the valves to
their seats.
The ex
haust
valves are sodium-filled and have
a positive valv
e
rotator
which
serves
as
the
lower
valve
spring
seat.
A
valve
clearance
adjust
ing scre
w
with flat
swivel
push
er pad is
mounted in
one
end
of the
valv
e
rocker.
Forged
steel valve
ro
ckers with rol
ler cam followers are
used. The rollers
are
hardened and honed to provide
an
extremely
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s m o o t h and
permanent
wearing surface.
The rollers operate on
small bronze hubs . Hol low
rocker
shafts
are
drilled
passages in
the valve
rockers
convey
oil to
all
m o v i n g
parts.
The rockers are
f i t ted with
bronze bearings
containing
annular
grooves for
oil
pickup.
Rocke r
box
covers
are
not
entirely
interchangeable. End
rocker box covers are machined
and
tapped
for the
attachment
of the
camshaft
gear housings
and
end rocker
box
covering plates.
Intermediate cylinder rocker
box
covers
are
not
so
machined .
End covers
are
interchangeable.
Intermediate
covers a lso
may
be interchanged.
23.
C am s ha f t
f t .
A hol low camshaft
(figs.
53 and
54)
is mounted
o n each
bank
of
cyl inders.
The ho l l ow passage l e s sens the weight
o f the
shaft and also provides an oil passage for pressure lubrication
to
the
valve parts. Tubular inter-cylinder c o nne c t o r s (fig.
21)
inc lose the
camshaft between cylinders.
They
are c lamped in
place
by
the rocker box covers and
sealed
by 0 ring gaskets.
Each camshaft is driven separately by
bevel
gears in
the
accessory
case.
The
horizontal, vernier-type,
spl ined
drive
shaft,
con n e c t i n g the drive and driven gears, can be removed to permit
separate
rotation o f
the
camshaft for e n g i n e
timing
purposes .
Regard less o f gear
positions,
spl ines wil l mate at s o m e
point
o f
insertion.
24.
Accesso ry
Case
f t .
The accessory
case
(fig.
52)
is
an
a luminum-a l l oy
casting
containing the gear train
that drives
the camshafts, magne to s ,
tachometer, oil pumps, fuel
pump,
governor,
supercharger,
ge n
erator, power take-off, and coo l i ng fan. It also accommoda te s the
oil
filter, starter,
accessory
case
breather adapter and lifting
eye,
and
the
oil
control housing assembly
(B, fig.
35). Where gear
loads require, bearings are supported by bronze bearing l iners.
Passages drilled in
the
case permit pressure lubrication to
all
bearings.
The accessory-case-to-crankcase f lange contains two l o ca t ing
dowe l pins and three oil transfer tubes.
The drive
c o nne c t i o n
b e t w een the crankshaft
and
the accessory case gear train is a
spl ined shaft which is
installed
when the accesso ry case
is
a s s e m
bled
to the crankcase.
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2
5
I n d u c t i o n S y s t e m — S u p
e r c h a r g e r
(%. 49)
carburetor
is mounted at ea
ch end of the
ca
rburetor elbow.
This
elbow is a
jacketed cast-aluminum
housing, having an outlet
at
its center. This
center
outlet
is
attached
to
the inlet
of
the
supercharger h
ousing. The supercharger
hou
sing has
scroll out
lets to the intake
manifolds
on either side of
the engine. The
air
and
fuel mixtu
re picked
up
at the supercharger housing
inlet
is circulated by
the supercharger impeller, and
directed by dif-
fuser
vane
s to the
h
ousing
branches or scrolls, and then
dis
tributed to
the
intake manifolds. Through
the use of
t
he super
cha
rger, intake manifold
pressure
is
raised to
38 to 40
inches
of
mercury (absolute).
A
balance tube,
to
counteract
surge,
con
nects the 2 intake manifolds
between
No.
5 and 6
cylinders. An
aspirator, or
siphon, is located in each manifold,
utilizing the
pressure
drop
acr
oss the
carburetor to pick up any
raw gasoline
which might
collect in each
end
of the
carburetor
elbow
at high
manifold vacuum and distribute
it in the manifolds. Each
aspira
tor is conne
cted
by
two flexible lines, on
e
from
the carburetor
air
inlet and the other
from
the
bottom of the carburetor el
bow.
The
siphon action continues to
take
any
raw
fuel
from
the
elbow
and
deliver it into the intake manifolds until
a posi
tive
press
ure
is built up
in
the
m
anifolds.
carbureted
mixture heating system is pro
vided
for
cold
weather o
peration of the engine.
Controlled
hot
exhaust gases
are passe
d
through the jacketed
carbu
retor
elbow for
heating
the
mixtur
e as it enters the
supercharger. The intake manifold
vacuum is
utilized to
c
ontrol the heating system butterfly
valve
located
at
the
outlet
of
the
elbow.
This valve
is
of
the
spring-
balanced, diaphragm
type. A l
ine
leads from
the supercharger
housing to the housing of
the
control
valve. A
high manifold
vacuum opens
the valve and let
s
exhaust ga
ses
p
ass through the
jacket of the carburetor
elbow
and
heat th
e
carbur
eted mixture.
As the manifo
ld vacuum decreases,
the valve
closes,
thus stopping
any
further preheating of
fuel
mixture.
Any
prehea
ting of the
carbureted
mixture at high engine
speed and maximum load
is
objectionable. This tends
to reduce the maximum output
of the
engine.
26 C ra n kc a
s e
B
r e a t h i n g
Sys tem
Th
e crankcase
breath
ing system is
a
completely
closed
sys
tem.
It enables the inside of
the
e
ngine to be vent
ilated
at
all
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times
and makes
it
possible to
subme
rge the e
ngine w
ithout water
gettin
g in
.
T
he
intake manifold
vacuum
is
used t
o circulate ai
r thro
ugh
the crankc
ase a
nd accesso
ry
ca
se. A
fresh
air
line
origina
ting
a
t
the
rig
ht
(
1-3-5)
side
carbur
etor
air
inlet
leads
to
the
crank-
case
oil
filler pip
e. The fresh
air lin
e cont
ains
a flame
arrester
to eliminate
any p
ossiblity
of
fla
me
flashbac
k in the
fuel
system.
A
breathe
r line also
connect
s the
f
iller
pipe to
the crankcas
e.
c.
Tw
o
extern
al
lines are
also
attac
hed to
a
triangular
breather
ad
apter on
the top
of the
accesso
ry case and
lead to
two
a
ir-
meterin
g
valv
es which
are located
in
the front of
the carbure
tor
el
bow just below
each
carbu
retor
outlet. T
hus, c
rankcase air is
c
irculated
from
the
fresh
air in
let at
the carbur
etor, th
rough
the cra
nkcase, an
d out
at th
e
top
of the
accessory
ca
se,
return
ing
into
the
carbu
retor elbow
.
Cylinder
blow-by
gases ar
e
also
carried
from the acce
ssory
ca
se to
the carbure
tor elbo
w
through
the same
tw o
line
s.
The func
tion
of
the air-m
etering valv
es, in
the carbu
retor
elbow
,
is
to restric
t
the flo
w
of
blo
w-by
gases and vent
ilation
air into
t
he
man
ifold
at idling and low
en
gine speed
s,
s
o not to
di
sturb
the
carbu
reted
mixture
ratio.
Passa
ge
of
only a sma
ll
amount
of
air
is
required
at
these conditions
as
cylinder
blow-by
is low.
The v
acuum in
the manifold
is
high un
der
l
ow spee
d c
on
diti
ons. This li
fts a plung
er in
the valves causi
ng a
restrict
ion
of
air flow. T
he m
anifold
vacuum
is
low
when
the
en
gine is
running
a
t high spe
ed and full l
oad co
nditions, and
the volume
o
f cyli
nder blow
-by
gases is hig
h. This
requ
ires
a larger
ope
n
in
g
t
hrough
the va
lves in order
to
pa
ss
the
inc
reased volume
of
air
and ga
ses to
the intake
m
anifold.
T
hus, the plu
ngers in
the
valves
drop
down
of
their
own
weight
and
open
the
valve
for
free flow
wh
en there is low
vacuum
, and
are
lift
ed by hi
gh
vac
uum
to
restrict
the
fl
ow w
hen
fre
e passage is
not
desired.
2
7
Cool in
g Sys tem
Alu
minum muffs
are
mo
lded to
steel barrels
and
machi
ned
to
provide
air-coo
ling
fin
s for
the c
ylinders.
The aluminu
m c yl
ind
er
heads
c
ontain cas
t
cooling f
ins for
air
-cooling. Cyl
inder air
deflectors
direct
air
flow
acro
ss
the cylinders.
The
tops
of
the
c
ylinders
are shroude
d to house
an air-
cooling
suction fan w
hich
is mo
unted o
n a ve
rtical
shaft. This cas
t aluminu
m fan is
stat
ically balan
ced by
the
m
anufacture
r. Th
e
fan
d
rive vertica
l
sh
aft
is driv
en by bevel
gears
housed
in the top o
f the
cran
kcase.
Th
e
beve
l gears are
driven
by a hor
izontal d
rive
sh
aft
from
th
e
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accessory case
gear
train. The
fan
draws
coo l i n g air
from
the
underside o f the cylinder through the cylinder f ins and discharges
the hot air vertically from the
shroud.
The eng i n e and trans
m i s s i o n oil
coo lers
are mounted in
the
shroud
above the
cyl inders.
A portion o f the
air exhausted by
the coo l i ng
fan
is drawn through
these
coo lers
and
keeps
the
oil at
the
desired
operating
tempera
ture.
28.
Fuel
Sys tem
An ac, type BF, fuel p u m p and an
ac
fuel filter
are m ou n t e d
o n the
acces so ry
end o f the eng i n e to
supply
c lean fuel to the
two
carburetors.
Flexible
l i nes carry
fuel
from the filter to the
p u m p
and
carburetors.
The
Stromberg,
Model
NA-Y5G-3,
carburetor
is
especially
des igned for use o n
ordnance eng in e s .
A Bendix, type EF,
fuel
primer filter
is
mounted on
the
accessory end o f the eng ine t o supp ly c lean fuel for the primer
sys tem.
Fuel enters the
filter under
pressure from
a p u m p
in
the
vehicle
and is carried to each cylinder head by
external l ines .
Fuel enters the cylinder
through
spray-type nozzles. The primer
sys t em was des igned for
use o n ly during
engine
starting.
29.
Ign i t ion
Sys tem
a. T w o Bendix-Scintilla
type
S6LN-32,
magnetos,
driven from
the accessory case, are
mounted
at the
top
left
corner
o f the
acces so ry
case.
They are conne c t ed to two
spark
plugs in each
cylinder by
a
radio-shielded high-tension ignition harness. The
entire
ignition
system is ventilated, radio-shielded and water
proofed .
Each
magneto
f ires
six
spark
plugs.
The
inner (right)
magneto
f ires
the accessory end plug of each cylinder, and the
outer (left) f ires the
f lywheel
end plug o f each cylinder.
The magneto drive
gear
train
contains an Amer i c an -Bosch
type spark advance governor. A preset
control
o f the governor
provides for a
15
degree
spark advance during the
1,500
to 2,450
rpm
eng ine speed range.
A Bendix-Scintilla
single-spark,
waterproof,
booster
coil
with
a
radio
interference
filter
is
used
for starting
the
engine .
The coil is energized by
a
24-volt storage battery. It provides
starting impu l ses for the inner
(right)
magneto
during the crank
ing o f the
eng ine ,
when the
magnetos
are
not
being
turned fast
enough
t o p roduce
adequate vol tage.
The coi l
del ivers a
s ingle
spark at each open i ng
o f
the
magneto
contact
points,
rather than
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a
f l ow
o f sparks as delivered by the
conven t i ona l
induction vibra
tor-type booster coil. The coi l
is
connec t ed
to
the
ground c o n
nection
o f the
inner
magneto
through a waterproof, radio-shielded
cable. The other magneto ground c o nne c t i o n is connec t ed through
a
similar
cable
to
the
radio interference
filter unit.
Intake manifold vacuum is used
to
provide forced-air
c i rcu
lat ion,
within the i n c losed waterproof magnetos and ignition
harness,
to
carry away condensation.
A flexible
l i n e connec t s the
air-inlet
side
o f
the
left (2-4-6)
side
carburetor to the t op o f
the
inner
magne t o .
Another
l i ne
c o nne c t s the magnetos.
A flexi
ble l ine extends from
each
end o f
the ignition
harness to each
end o f the carburetor e lbow just be low the carburetor
out lets.
B y
utilizing the
va c uum
in each carburetor elbow, fresh air is
drawn from the
air-inlet
s ide o f the
carburetor, through
the
magne t o s and
the inside of the ignition harness,
i n t o
the elbow.
The f l ow
o f air
is
controlled
by
the
size
o f the
ori f ice holes in
the
various
units
and by the amount o f
va c uum i n
the intake
mani fo ld .
30. Star ter
The
Eclipse-Pioneer
starter
Model
36-E16-1A
(800
ft-lb
capacity) is
a 24-volt, dc, waterproof
unit,
consisting o f a
motor
s e c t i on and a gear sec t i o n .
The
Jack
and
Heintz starter,
Model
JRD-30,
opt ional with
the Ecl ipse
starter, is essentially the same,
except
that
it
is
f i t ted
with
a quick-d isconnec t
mounting attachment. The quick di scon
nec t feature consists o f a worm drive
attaching
device, operated
by a
smal l
p in ion
which
is
readily
access ible . A
lock
keeps the
smal l p in ion
from
turning
or
working
loose.
31.
Genera to r
The
Eclipse-Pioneer generator
Model
30EOO-3A is a 150 am
pere, 28.5 volt, dc unit, as
generally used
for
energy
in 24-volt
elec t r ica l systems.
32. Send ing Uni t
and
Swi tches
One ac
electrical
sending unit and t w o
switches
are located in
the
main oil passage
at the
top o f the
accesso ry case.
This oil
pressure type sealed
unit
is
internally
constructed
and calibrated
so that
electrical
contact points close when
the
oil pressure in
the
main
oil
l ine
o f the engine falls to 30 ± 2
psi,
thereby c los ing
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the
circuit
and cau
sing a w
arning light mounted in
the
veh
icle
to li
ght.
This
sealed elec
trical oil
pressure gag
e
un
it is rugged
ly constructed
and
c
onsists of
a
threaded
plate
to
which
are
crimped
a
diaphragm,
a
radially
not
ched spring,
and an overlo
ad guard
p
late.
The unit is con
nected to an
ele
ctric gag
e located in the vehicl
e.
This
se
aled
electrical unit is
internal
ly
constructed
and calibrat
ed
so that elect
rical
cont
act points close whe
n the oil
temperature
in
the
main oil lin
e
of
the engi
ne
reaches
245°
± 5
°
F.,
thereby
closing the
circuit,
and causing a
warnin
g
light
mounted
in the
vehicle to light.
33
Tab
ulated
Data
Accessories
(No):
Booster co il ______
________—
_—_—_—_
_ 1
Carburetors
_________
______—___
__—__—_ 2
Fuel fil
ter ____
___________
___________
_____ 1
Fuel p
ump ______
___________
___________
__ 1
Generator
____
___________
___________
__—_
1
Governor ____
___________
___________
______
1
High temperature
warning l
ight
send
ing switc
h________ 1
Magn
etos _________
____________
___________
2
Oil
filter ___________
____________
____________
1
Oil
low
pressure
warning light sending
switch__
______
1
Oil
pressure
gage
sending
unit____
_____________
___ 1
Primer f
ilter
___
__ _________
____________
_____
1
Sp
ark plugs _
____________
___________
______ 12
Starter
__________
____________
___________
1
Tachometer
(transmitter)
_____
___________
_____
1
Accessory
drive ratio
s (crank
shaft
speed)
Camshaft ______
___________
__ _______
__
0.5
Cool in
g fan __________
___________
__________
1.58
Fuel
pump ___
____________
____________
______ 0.81
Gen
erator
___________
___________
_________ 2 .60
G
overnor ________
___________
___________
__ 1.10
Magnetos coun
terclockwise as viewed from
abo
ve)_____ 0.5
P
ower-take-off __
___________
__________
_____ 1.0
Starter
_________
___________
___________
__
0.91
Supercharger
impeller
__________________________
7.94
Tachometer d
rive __
___________
___________
__ 0.5
Camshaft rotation___
___counterclockw
ise viewed from
acce
ssory
end
Co
mpression
ratio________
___________
___________5
5:1
C
ooling fa
n
rotation.———
— ———___clockw
is e
viewed
from
ab ove en
gine
Cylinder bore —
— — — — — — — — —
— — — — — — — — — _
..————______5.75
in
Engine
idle s p e e d —————
— — — — _ _ _ — _ —
— — — — — _ _ _ _ _ _ _
_650 rpm
4
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Engine main
oil
lin
e pressure
_——————
_60 to
70
psi at
2,800 rpm
(SAE
50
oil
at 180° F.).
35 m
in a
t
idle
Engine speed
—Governor____
____————_2,
950 rpm max
at no
load
2,800 rpm
min
at full lo
ad
Fi
ring order
_______
________——
__________1
-6-3-2-5-4
Ignition
timing__
____automatic
advance, set 10
deg
before top cen
ter
Generator
charging
r a t e _ — — — — — — — — — — — — — — — — — — — — 1 5 0
amp—28.5
v
Piston displacem
ent___——————
——————————
——————895.9
cu
in
Piston
s t r o k e _ _ _ _ _ _
_ — — — — — — — — — —
— — — — — — — — — —
— — — — — — — — 5 7
5 in
Sp
ark plug gap________
______—_——
________0.011—
0.014 in
Su
percharger____
_____________
_____38
to
4
0 in-Hg
at 2,800 rpm
Intake
manifold
absolu
te dry
pressure,
16
to 18 in-H
g at idle 650
rpm
Valv
e
clea
rance (cold
engine):
Exhaust_
____________
____0.020 in
(0.014 in under roller)
Intake____
___________
___________
_______0.007
in
Valve
events
(cold
engine):
Exha
ust
closes
_——————————
———————32 deg
a
fter top center
Exhaust opens___ _ _ — _ —
— — — — — — — — 6
8
deg
b
efore
bottom ce
nter
E
xhaust
remains
o p e n — — — — — — —
— — — — _ — — — — — —
— — — — — — — 2 8 0 deg
In
take closes____
_____—————
—_84 deg after bo
ttom
ce
nter
Intake
opens_______
____—————
__40
deg be
fore
top center
Intake
remain
s open_
_______—____
_________——
—304
deg
Va
lve
li
ft__________
____________
___________
0.4053 in
Valve
timing
setting_____
__intake
closes
50
deg
after bot
tom center
with
0.100 in
clearance
Sec t i on
II
PREP
AR ATION OF ENGIN
E FOR
REBUILD
34
General
Engines removed
from
vehicl
es
for rebuild mus
t be thor
oughly clea
ned,
drained,
and
stripped of accessories.
Refer
to
pertinen
t operators t
echnical
man
uals
for procedures
on removal
of
the
engine
from
vehicles.
Send
the accessories
to pro
per de
partment for
ins
pection
and rebu
ild.
35 Cle
an ing and D
raining
M
ount the engine
on th
e
engin
e stand
which is
containe
d in kit assembly
7
083741
(
fig. 9). Thoro
ughly clean
all
parts and outer
surfaces before
attempti
ng any repair or rebuil
d
operations.
M ake
certain
no
foreign
matter
enters the
working
parts
o
f
the eng
ine or
its
acc
essories.
Close or cover
all
op
enings.
W
ash the
engine, using wat
er under
pressure to
remove as
m uch
mud
and
d
irt as
possible . Remov
e remain
ing
grease
and
dirt,
using a
stiff
brush
and dry-cl
eaning
solvent or volatile
mineral
spiri
ts.
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Break
locking
wires. Drain
oil by
removing plu
gs
in ac
cessory case s
ump, oil fi
lter, and the
crankcase
oil pan.
Re
m
ove oil fi lter assem
bly (pa
r. 36).
36
R e mo v al
o f
A c c esso r i e
s
The carbu
retors ca
n
be
remove
d
with
the
carburetor
elbow
as
a
subassem
bly
(par.
50).
1)
At the
carbure
tor, disconnect
fuel supply
lines,
fuel
pum
p
vent
line,
and electrical
conne
ctions from
de-
gasse
rs;
ve
nt
lines from mag
netos and a
spirators;
carbu
re
tor-to-oil
filler
breather tube
(par.
37)
a
nd
fuel lines
from
the p
ump.
2) Disconnect
all
throttle
linkage
rods from carburetor
a
nd govern
or. Install pins
for safekeepin
g.
3)
Remo
ve jam
nuts
, plain
nuts, and plai
n washer
s hold
ing car
buretors to
carb
uretor el
bow .
L
ift o
ff
ca
rbu
retors
. Discard
g
asket.
fig. 13).
1)
Disc
onnect spark plug
leads at
spa
rk
plugs.
Us
e crow-
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foot
wre
nch 41-W-871
-65 to
detach shi
elding nut. U
se
crowfoot
wrench 41-W
-871-75
to
hold
s
park p
lug.
(2) Ven
t li
nes
and
holding
clamps ca
n
be
r
emoved with
the
ha
rness
wh
en
d
isconnected
f
rom
the
carb
uretor
elbow
. Remove
clamps
holding harness
to car
buretor
elbo
w .
(3)
Disc
onnect
ad
apters
at magne
tos by r
emoving
holdin
g
sc
rews. Lift
off adapters
.
(4)
The harness
is suppo
rted by
clamps
secured with
bolts
located on eac
h side
of the en
gine, below
cylind
ers
N
o.
1 a
nd 5 ,
a
nd
2 and 6. Remove
bolts. Rem o v
e h
arness
with v
ent lines at
tached.
Spark plugs
may be left
in t
he
cylinders
until cylind
ers
are to
be
removed
from
the
crankcase
(par.
52).
(1)
Disc
onnect and
remove
fuel-p
ump-to-fue
l-
filter line. R
emove
nuts ho
lding fuel fil
ter bracke
t to
accessory
case. Lift
off
filter and
bracket.
(2)
Disconn
ect
pr
imer
lines
to No. 1 and
No.
3
cylinders. Remove
bolts
holding th
e
primer
brack
et to
the accessory
case.
Lift off fi
lter and brac
ket.
(3) Remove
the
oil
filter assembly
from its
hous
ing in the acc
essory cas
e by removing
the ja
m nuts,
plain nut
s, and
plain was
hers. Pull t
he filter from
th
e
housing
by the
handle provid
ed for this
purpose.
Dis
card ga
sket.
Depress l
ocking plate
with
wrench an
d loosen
worm-gear
bolt.
Remove start
er from
its
drive ass
embly (fig. 14 )
.
(fig. 4
7). The ge
nerator is
mounted on
six studs
fix ed
in
a
generator
drive
assembly
(F)
which
is
bolted
to
the
acc
essory
c ase.
Remove
jam
nuts, plain
nuts, and
plain
washers.
Withdraw
gene
rator from
the
drive assembly. U se
care
not to
damage the
splined
end
of the g
enerator sh
aft as it is re
moved
from
the
drive assembl
y.
/
.
The fuel
pump need n
ot be rem
oved unti
l the
ac
cessory case
has be
en
tak
en off
the engine.
Disc
onnect fuel-
pu
mp-to-carb
uretor flexi
ble li
ne (V) and
fuel-fil
ter-to-fuel-p
ump
flexible
line (T,
fig.
114),
and
the vent
line
from
fuel
pump.
Re
m ov
e jam nuts,
plain
nuts,
and plain
wash
ers holdin
g fuel pump
to f
uel pump d
rive
a
dapter (AA,
fig.
45). Remove
pump. D
is
card
ga
sket.
(fig.
54). Remove
jam
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nuts, plain nuts,
and plain washers.
Lift the ta
chometer tran
s
mitter assembly
(FF)
off
the
studs. Discard
gasket.
(1) Remove
cables between booster
coil
with
filte
r
assem
bly
(
HH,
fig. 110)
and magnetos.
(2
) R
emove
two moun
ting nuts
and washers fr
om each mag
neto
and
lift
the
magnetos
from the magneto drive
hous
ing
adapter (G, fig. 44).
Discard ga
sket.
(3 ) Re
move screws
and washers h
olding booster coil
to
mount
ing bracke
t. Remove coil
.
(1) Disconnect
throttle linkage rod f
rom governor rocke
r
arm
(Y,
fig
.
117).
(2 )
Remove
j
am
nuts,
pl
ain nuts,
and
plain
washers. L
ift
the
gov
ernor from the
camshaft dri
ve housing.
Re
move
drive
shaft with
balls, upper
race, and thrust
bearing
assembly
.
The oil con
trol
housing
cover (P.
54, fig.
17)
must be
remo
ved before
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valve
s can
be r
emoved.
The
valves
may also b
e remov
ed
at
the time t
he
oil control housin
g i
s removed
from the
acc
essory
case pa
r.
56
/).
R e
m o v e
the
oil
filter by-pass,
oil pressu
re c
ontrol, and oil c
o o ler
by-pass
v
alves with specia
l wr
ench 4
1-W-3727-
33 fig.
15).
The
oil coo
lers are
bolted
to
the
en
gine shrou
d and can
be removed
with the shr
oud.
(1)
Disconnec
t and remove
the en
gine
o il
c
ooler inlet
line a
ssembly
J, fig. 86).
Use
wrench
70 8 3 7 3
8
C
, fig. 6).
Disconn
ect engine oil c
o o ler
o
utlet line
F, fig.
8 6
)
at the
o
il control
housin
g. Lift
shroud
and oil cooler
s f ig . 16)
from th
e engine as
an
assemb
ly .
(2 )
D
isconnect
and remove en
gine
a
nd
transmi
ssion oil c
ooler lin
es. R e m o
ve tw
o
plain
nu
ts
and washers
and
two
drilled
h ex-head
bolts (N,
fig.
8 7 )
from each
cooler
Lift cooler
and
screen
a
ssembly
fro
m the shroud.
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S e
c t io n III.
DIS A S S
E M B L Y
O F
STRIPPE
D ENGINE
INTO
SU
B A SSEM
B L IES
37.
R e m
o v a l
o
f
E n g in
e
S h r o u
d and
O
il
Co
o le r A s
s e m b l y
(fig.
17)
Remove
the
t
wo hex-h
ead bo
lts wi
th int
egral-tee
th lock
was
h
ers K
and
L,
fig.
113) ho
lding th
e oil filler
pipe bracket
to
the
sh
roud. Rem
ove the
hotspo
t out
let
housing brac
kets (T
) and
(M M
) and the
ho
tspot ou
tlet slot
top and
bott
om covers U
)
a
nd (V
).
Disco
nnect t
he vacu
um heat
con
trol line
as
sembly
KK
)
at
the h
otspot c
ontrol valve
(B
,
fi
g. 83).
Remove
the
f
our
dri
lled
h
ex-head
bolts (E
) a
nd their pla
in wash
ers
(fig.
83
)
holdi
ng the
hotspot outlet
assembly
to
the
top
of
the
carburetor
elbow. Re
move
the asse
mbly. Dis
card
the gask
et. Rem
ove
the bolt
s
hol
d
ing
the
right (1-
3-5) and le
ft
(2-4-6) side
exhau
st ma
nifold
cool
ing
air inlet
elb
ows
(H) a
nd Z) to th
e
shrou
d.
Re
move the
e
lbows. Rem
ove the
right
(
1-3-5)
and left
(2-
4-6) side
hots
pot
i
nlet slot cov
ers M)
and (L
L). Re
move
the rig
ht (1-3-5
) and
le
ft (2-4-6
) sid
e exha
ust ma
nifold sl
ot cover
s K)
and (AA).
Remov
e
the slotted
nuts
L)
and pla
in
wash
ers
B) f
rom t
he
cylinder studs.
Remove
the cotter
pin,
washer, spring,
drilled
fla
t-head pin,
nuts, and
bolts
fr
om the
cran
kcase eng
ine lifting
ey
e and
b
racket
KK
and GG
). Remov
e
the as
sembly from
the
e
ngine
flange
Remov
e the se
lf-lockin
g nuts
hold
ing
t
he cooli
ng
fan
outlet van
e housi
ng (Q) to
t
he shro
ud.
R
emove
the
vane.
Re
move the
coolin
g fan
a
nd fan
clutc
h assem
bly (par.
38). R
e
move
the t
hree self-lo
cking n
uts (D),
the
four
shrou
d
suppor
t
drilled
hex
-head
bol
ts
(A)
, and
plain wa
shers
B)
holding
the
fan
rotor
housing
assembly
(E)
to
the
engine.
Disconnect
the
oil
cooler lines
at the
oil control
h
ousing end
. Loose
n
the two
clamps
on
th
e ho
se betw
een th
e cran
kcase oil
filler
pipe a
nd the
breat
her
tu
be flame
arrester
assemb
ly (M ,
fig. 11
3). Loosen
the
cla
mps
be
tween the
flame ar
rester
and
t
he
carburet
or-to-oi
l-filter b
reather
t
ube (N
). Loose
n the two
clam
ps on
the
h
ose b
etween
the ri
ght
(1-3-5
)
side
carb
uretor
and
the ca
rburetor
-to-oil-f
iller breat
her
tube (N),
(fig. 113).
Re
move
the flam
e a
rrestor and th
e b
reather
tub
e
fro
m the s
hroud.
Remove
the
shroud
and
oil
cooler
assembly
from
the
e
ngine
(fig. 16).
38
R em o
val
o f
C o o l i n g
Fan a
nd
Fa n Clu tc
h A s s e m b
ly
Remove
the screws
holdin
g the
fan
dri
ve ver
tical sh
aft
co
ver
5
1
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(Q) to
the outer
(upper) clutch housing (M,
fig.
73). R e m o v e
the
cover .
R e m o v e
the
cotter
pin from the
slotted
nut o n the fan drive
vertical shaft (C, fig. 82). R e m o v e
the
coo l i ng fan and fan c lu tch
(fig. 73) as
an assembly
by lifting it
from the
fan drive vertical
shaft.
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39. Remova l o f Crankcase Oil Fi l le r Pipe and
Breathe r
T u b e
(fig. 113)
Eemove
the
clamps and connecting hose from
the
crank-
case breather tube (E).
R e m o v e
the
four
bolts
in the
base
flange
of
the crankcase
oil
filler
pipe assembly (J). R e m o v e
the
pipe
from
the oil pan.
Discard the
gasket.
40. Remova l o f Exhaus t Manifold Sect ions
and
Ho tspo t
Manifolds
(fig.
112)
R e m o v e
the bolts holding the
right
and
left
hotspot mani
folds
to
the
carburetor
elbow
and exhaust manifold
sections. R e
m o v e
the
hotspot
manifolds.
Discard the gaskets.
R e m o v e the
self-locking
nuts
holding
the
right
and left ex
haust
manifold
section
flanges to
the cylinders.
R e m o v e
the mani
folds.
Discard the gaskets.
41.
Remova l o f Rocker Box and Camshaf t Gear H o u s in g
Oil
Drain
Manifold
(fig.
107)
L o o s e n
all hose
clamps. R e m o v e
all flange
connecting
bolts
at
the accessory
case sump
and
at
the
oil pan.
Remove the cylinders
N o .
1,
2,
6,
and 5
oil
drain line assemblies (E), (F), (Q), and
(Y). Discard the gaskets.
R e m o v e bolts and
gaskets
from
the
cylinder N o . 1,
2,
3, 4,
5,
and 6 oil drain manifold sections (C), (B), and (P) attached
to
the cylinder heads.
Remove
the
sections
as
a
unit
from
each
bank o f
cylinders.
Discard
the
gaskets.
R e m o v e the manifold-to-oil-pan adapter (S) from
the
oil
pan. Discard
the gasket.
42.
Remova l
o f Intake Manifolds Ba lance Tub e As p i rato r s
and Connectors
(fig. 106)
a.
Loosen
all hose clamps.
R e m o v e
the flange
bolts
holding the
left (2-4-6)
and
right
(1-3-5) side
intake manifold
connectors
(C)
and (X) to
the supercharger housing
and
lift
off the c o n
nectors. Discard the gaskets.
6. R e m o v e the
flange bolts holding
the intake
manifold balance
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tube
connector tubes (J) to the intake ma
nifold
assemb
lies and
lift
off the
connector tubes. Discard the
gaskets.
Disconnect the
carbureto
r
elbow-to-aspirators
flexible l ine
asse
mbly
(EE) and
the
left and
right carburetor air-inlet-to
-
aspirator
flexible line assembly (DD) from the
aspirators (GG) .
Remove
all
nuts
holding cylinders
No.
2, 3, 4,
and
6
mani
fold sections (F),
(G), and (H) and cylinders No. 5 an
d 1 mani
fol
d
section
assemblies (V
) and (W) to the cylinders.
Lift
the
sections
from each bank of cylin
ders
as
a
unit. Discard gaskets.
Rem
ove
the bolts from the
balance tube f langes (L) holding
the bal
ance tube in the crankc
ase. Rem
ove
the flange
s, hoses,
and
0
r
ing gaskets. Slide the tu
be
out
of
the
crankcase. Discard the
gaskets.
43. R emov a l of Th e Thro t t le
L i n k a g e
The
cross
sh
aft assembly
can
be removed with the carburetor
elbow
(par.
50).
Disconnect the
cross shaft
ass
embly linkage
by removing
the
cotter pin, slotted nut, wash
er, and
bolt
from the rig
ht-
a
nd
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A—BOLT,
DLD-H
EX-HD
7376131
B—W
ASHER, PLAIN
7767318
C—SUPPOR
T,
ROT
OR H
OUSING 7375867
D—NUT, S
ELF-LOCKING 587343
E—HOUSIN
G,
FAN
ROTOR,
ASSY 737605
3
F
—STUD
7403066
G—STUD
7403067
H—E
LBOW,
EXHAUST MANIFOLD
COOLING
AIR
INL
ET, RIG
HT
(1-3-5) SIDE 7376010
J
—BOLT,
HEX-HD
741
4584
K—COV
ER,
EXHAUST MAN
IFOLD
SLO
T, RIGHT
(1-3-5) SID
E
7375869
L—NUT, SLTD
7
703684
M—COVE
R,
HOTSPOT
INLET SL
OT, RIGHT
(1
-3-5) S
IDE
737
6015
N—GROMMET,
OIL
CONTROL
HOUSING
COVER
7375857
P—COVER,
OIL C
ONTROL HOUSING 7403365
Q—HOUSIN
G,
COOL
ING
FAN
OUT
LET VANE
7403381
R—NUT, SE
LF-LOCKING 50
3347
S—BOL
T, HEX-HD
7416584
T—BRAC
KET, H
OTSPOT OUTLET HOU
SING 7376259
U—COVER,
H
OTSPOT OUTLET SLOT,
TOP
73
76257
V—COVE
R,
HOTSPOT OUTLET SLOT,
BOTTOM
7376258
W—CLIP,
TRANSMISSION
AND
ENGINE,
OIL COOLER
OUTLET
LINES 7
376082
X—SHR
OUD, ENGINE
, ASSY
73 7
5868
Y—GROMM
ET, TRANS
MISSION OI
L LINE 73 7
6701
Z—ELBO
W,
EXHAUST MAN
IFOLD
COOL
ING,
AIR INLET, L
EFT
(2-4-6)
SIDE 7
37601 1
AA
—COVER,
EXHA
UST MANIFOLD SLOT, LEFT
(2-4-6) SIDE
7375870
BB—PI
N, COTTER
1 3 71 85
CC—WASHER
, PLAIN, LIFTING
EYE SPRING
73 7
6080
DD—SPRING,
ENGINE LIFTING
EYE 73 7
6032
EE—NUT, JAM 107381
FF—NUT
, PLAIN
2
2 5855
GG—BR
ACKET,
ENGINE LIFTING
EYE 7376021
HH—PIN, DLD-FL
-HD,
LIFTING
EYE 7376019
JJ—
BOLT, DLD
-HEX-HD 73 46710
KK—EYE,
EN
GINE
LIF
TING 7376
02 2
LL
—COVER,
HOTS
POT
INLET SLO
T, LEFT
(2-4-6) SIDE
737601 6
M
M—BRACKET,
HOTSPOT OUTLET HOU
SING 7376700
NN—CLIP, CA
RBURETOR BREAT
HER TUBE 73
76039
p
p—NUT, SLTD
225869
QQ—WASH
ER, PLAIN 502245
Co
ntinued
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le
ft-hand-
thread
rod-en
d ball beari
ngs E)
and
(J)
(
fig. 75
) at
the
car
buretors
.
6 . Remove
the
cotter
pin
, slotted
nu
t, wash
er, a
nd bolt from
the r
ight-han
d-thread
rod
-end
ball bearing
(Q
,
fig.
75) a
nd the
c
ross sha
ft
l
ever A).
c.
Remove
jam
nuts
,
plain
nuts,
and plain was
hers f
rom th
e
cross
shaf
t
supp
ort brac
kets
(M, fig. 75).
Remo
ve the
cros
s
sha
ft
a
ssembly
fr
om the
car
buretor el
bow.
Remo
ve the cot
ter pin
, slott
ed
nut
, w
asher,
and
drilled he
x-
head
bolt
J)
from
the
ri
ght-hand
-thread
rod-en
d ball
b
earing
K) at th
e gove
rnor con
trol
shaft-t
o-vehicle
l
ever
(Q,
fig.
7
6).
Disconn
ect the left
-hand-th
read
rod-end
ball
bea
ring
(Q,
fig.
74)
from
one e
nd of the govern
or ro
cker
arm (Y ,
fig
. 117).
Remove
the
three
jam
nuts, plain nuts,
and
plain washers
from
the
gove
rnor contr
ol
shaft suppo
rt
bra
cket
E
, fig. 74).
Remov
e th
e brack
et
assembly
from
the
fuel pum
p driv
e
adapt
er
(f
ig. 30).
/. Remove
the
locking w
ire and
slotte
d
nu
ts
fro
m
the vehicle
control
lev er su
pport
H, f
ig.
7
6). Re
move the
lev
er
s
upport
asse
mbly .
44
.
R e m o v al
o f C y l i n d e r
Air
Def le c t o rs
(
fig.
98)
Detac
h
the
fou
r air defle
cto r
end spring
s
K)
hol
ding th
e
N o. 1 A
),
No. 6 A), N
o.
2
G
),
and No. 5
(G)
cylin
der
a
ir
deflecto
rs to
the
air deflec
tor clam
ps M). Re
move cotter
pin
s
nu
ts, bol
ts, and
air defle
ctor spac
ers E)
holding
the
deflecto
rs
toge
ther. Re
move
the four
d
rilled hex-he
ad bolts
(J)
ho
ld ing
def
lectors
to th
e cylinde
rs.
Rem ove
the
nuts
and
washers
from the
air
deflectors
hooks
(L
) clampin
g
th
e i
ntermed
iate
cylinder
s a
ir
defle
ctors F)
to
the cyl
inders.
Re
move the
deflecto
rs and c
lamps.
R
em ove t
he
bolts holdi
ng
the
inter
-cylinde
r
air ba
ffles (G ,
fig .
60) to the c
ylinders
.
Remove
the
b
affles.
Rem
ove
th
e i
ntermed
iate
cylind
ers
a
ir de
flectors F)
fro
m
the
cylind
er heads
.
45.
R e m o
v al o f
Valve
R o c k
e r Co v ers
All
cover
s
are
se
cured to
th
e
cylinde
r heads
by eigh
t
hex-head
bolts (
W ) (f
ig .
60)
and
can be lifted
off a
fter removal
o
f the
bolts.
C
overs on th
e No.
5 an
d No. 6
cylind
ers
a
re bolted
to
the
rocker
box coverin
g plates
T)
(f
ig.
53)
and
(
L )
(fig.
54)
.
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Y L I N D E R
H
E D
D E F L
E T O R
R A
P D
15
5888
Cover
s
on th
e N
o. and
No. 2 cyl
inders
ar
e bolted
to
the cam
shaf
t g
ear ho
usings
(N)
fig.
53
)
and
(P)
fig .
54).
R
emove
t
he
.b olts
an
d was
hers
an
d lift off
the
cov
ers. Disca
rd
gask
ets.
4
6.
R
emov
al
o f
P
r imer
L i n e s
fig.
108)
Disconnect
the
primer
lines
from
the
inter-cylinder primer
line
t
ube
tees G
)
an
d fr
om th
e
prim
er
filte
r a
ssemb
ly
M) which
is
lo
cated
on the
super
charg
er housi
ng.
Rem
ove the
li
nes ca
re
fully
witho
ut
k
inkin
g and
p
ut them
wh
ere th
ey w
ill no
t b
e
d
amag
ed.
4
7.
Rem
oval
o f C
amsha
f ts and
Ca
msha
ft Ge
ar
Hous
in gs
Remove
jam nuts,
plain nuts, and
washers
holding
cam
shaf
t gear
housin
g cove
r H,
fig.
53). L
ift cover
off stu
ds.
Re
mov
e
camsh
aft
gear
housin
g cove
r U
,
fig.
54)
by remo
ving
bo
lts and
w
ashers
. Discar
d c
over
gask
ets. R
emov
e the ca
m
s
haft
d
rive
shaf
t
sn
ap
ring K
, fig
. 5
3)
f
rom th
e cam
shaft
dri
ve
bevel
g
ear (HH
).
Rem
ove the out
er
oil-t
ransfe
r
plug
(L).
Use
5
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remo
ver
and
replacer 41
-R-2378-575
(fig.
19). With
the
same
remover,
rem ove the camshaft
drive shaft
(M,
fi
g. 53) from
the
cams
haft drive
bev
el gear (HH).
To remove the
right (1-3-5) side camshaft drive
shaft,
remove the
tachometer transmitter
d
rive
adapt
er (BB, fig. 54)
by
removing
jam
nuts,
plain
nuts, and washers. Discard
adapter
gasket.
Remover tac
hometer
transm
itter drive shaft
(Z).
Re
move th
e oil transfer plug and camsh
aft drive shaft as in above.
REMOVER AND
REPLAC
ER
.41-R-2378
-575
Loosen
valve ro
cker shaft
bracket
and camshaft bearing
cap
drilled
hex-head bolts
(Z,
fig. 6
0)
a
few turns at a time until
all are
loose.
Remove the
caps
and brackets with valve rockers
and rocker shafts (fig. 60).
These parts are
marked with iden
tifying n
umbers and must be
installed in their
original
positions.
Remove
the
tw o hex-head holts
(P,
fig.
53)
and
(T,
fig.
54) and tab washers holding
the camshaft gear housings
to the
cylinders. Loosen the
cam
shaft driv
e
sh
aft housing
nut
(DD,
fig. 53)
and
(WW,
fig.
54) at the accessory case.
Remove
the
camshaft, inter-cylinder connectors, an
d
gear
housing as au
nit
(figs.
20
a
nd
21).
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e. To prevent loss
or damage
whi le
handling the cylinders,
install the camshaft bearing caps and
valve
rocker shaft
brackets
in
positions
from
which
they
w e r e r emoved.
48. Remova l o f
Accessory
C ase Sum p
and
Scavenger Oil
P u m p
a.
R e m o v e
the four drilled hex-head
bolts
(V) and their wash
ers, and the 16
jam
nuts, plain nuts, and plain washers (S ) (T)
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and
U,
fig. 80
) h
oldin
g the
su
mp t
o the
acce
ssory
case
a
nd to
the
c
rankc
ase oil
pan
. J
ar th
e su
mp w
ith a
s
oft ham
mer t
o
loo
sen
it. Remo
ve
the s
ump.
Di
scard
the
gask
ets.
R
emo
ve
the s
afety
wi
re
and
slo
tted
nu
ts
h
oldin
g th
e sc
aven
ger
oil
pump
t
o the
a
ccesso
ry case fla
nge,
a
nd li
ft
off
th
e
acces
sor
y ca
se scav
enger
oil p
ump
fig.
11
).
49
Re
m ova
l o f
C
rank
case
Oi
l Pan
fig.
80
)
Rem
ove
th
e 16
jam nu
ts,
pla
in nuts
, and
p
lain w
ashe
rs K),
L),
a
nd M )
hol
ding the
oil
pan to
the
cra
nkca
se flan
ge. Lo
osen
the
rem
ainin
g 22
n
uts
holdi
ng the
oi
l pan
to
the
crank
case
.
Ja
r
the
pan
loos
e with
a
so
ft hamm
er.
I
t is
m
ore
conv
enien
t to sw
ing the
en
gine
sta
nd, bringi
ng the
oil
pan
to
the top.
T
hen rem
ove
i
t from the
cr
ankca
se, usin
g pull
er
screw
s
7083
740 fig.
7).
Di
scard
the
g
asket
.
50 R
emov
al o
f Car
bu re
to r
Elbow
If
the
carburetors and
the
throttle
linkage
cross
shaft
assembly
wer
e not
remo
ved
p
reviou
sly
pars.
36
an
d
4
3),
they m
ay be
remo
ved with
the
c
arbur
etor elb
ow.
D
isco
nnect
the
righ
t 1-3
-5)
and
left
2-4-6
)
side acce
s
so
ry case
br
eathe
r lin
es
V a
nd W , fig
. 113
) a
t the
nuts
on
e
ach
end
. Rem
ove
the s
crews
fro
m th
e ac
cesso
ry ca
se brea
ther
lin
e
clips
BB)
.
Rem
ove the
lin
es and
clip
s.
Disco
nnec
t th
e hots
pot v
acuum
hea
t con
trol
line
asse
mbly
KK,
fig.
83)
at
the supercharger
housing and
remove it.
D
isco
nnect
the
carb
ureto
r elb
ow-t
o-asp
irato
r and
left
a
nd
ri
ght carb
ureto
r air
-inlet
-to-a
spira
tor f
lexib
le line
ass
embly
DD)
and
c
arbur
etor
elb
ow-to
-asp
irator
s fle
xible
line
assem
bly E
E,
fig
. 1
06) a
t the car
bure
tor
elbo
w,
and
a
t th
e carb
ureto
rs, if th
e
carbu
reto
rs h
ave not
b
een rem
ove
d previ
ously
p
ar. 36
).
To
remo
ve the th
rottl
e lin
kage
c
ross sh
aft a
ssem
bly w
ith
car
bure
tor e
lbow,
r
emov
e
the
drill
ed bo
lt i
n the
righ
t-han
d-thre
ad
ro
d-end
b
all
beari
ng
L
,
fig.
74)
to dis
conne
ct th
e lin
kage c
ross
s
haft
a
ssem
bly from
the
gove
rnor
lin
kage.
Re
move
jam
nuts,
p
lain n
uts,
an
d
p
lain
was
hers A,
B
and
C f
ig. 4
9). Slid
e
the
carb
ureto
r elbo
w o
ff the
st
uds. D
iscar
d
the 0
r
ing
gaske
t.
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51 R e m o v
al o
f A c c e s s o r y Case and Scaven ge r and Pressu
re
Oil
P u m p
Remove locking
wire and remove the six
n
uts from studs
inside
the front web of
the
crankcase
along the bottom
flange.
6.
Remove
the
jam
nuts,
plain
nuts,
and
washers
on
the
six
st
uds
along
the top
f lange of
the ac
cessory
case
on the
crankcase
side.
c.
Remove t
he
six jam
nuts, plain nu
ts,
and washer
s
on
the
s ides of the case.
Loose
n the hose
clamps
(W
)
on
the cooling fan dr
ive hori
z onta
l
s
haft hose nipple (V,
fig.
82)
along the top f lange of the
crankcase. Loosening
the hose nipple in the accessory
case a few
turns
makes
it
easier
to remove
later.
With a soft
hammer, tap the accessory case lightly t
o free
it.
Then
remov
e
th
e case. Remove
th
e
accessory
drive shaft
(Z, fig. 39), the cooling fan drive
horizontal shaft
(Y,
fig. 82),
and
the
p
ressure oil pump drive
shaft (Z, fig. 71)
as the
acces
sory
case
is
removed from the cra
nkcase.
/. Remov
e the oil spill line snap
ring (W, fig. 35 ) at the
bot
tom
f lange of
the
accessory
case. Withdraw
the
spill
line (X ,
fig.
35).
Stand the accessory
case
on a
suitable
table
or disassembly
stand, and secure to avoid dama
ge
to attac
hed
parts.
Remove
the slotted
nuts
(A) an
d (R) and
the
drilled-head
bolt (U, fig. 71)
holding the scaveng
er
and
press
ure oil pump
(fig. 11) and
l
ines to the
crankcase. Remove the pump
and l ines.
52
R e m o v al
o f
C y l i n d
e r s and Pis
tons
a.
Remove all jam nut
s a
nd
cotter pins from
the
cylin
der hold-
do w n slotted nuts (PP, fig.
60).
Using a torque
wrench in combination
with
box
wrench
41-W-872-715 for larger
nuts, and
box wrench 41-W-872-710
(fig. 2 2
)
for
smaller nuts, remove the
cylinder hold-down nuts.
Check
and record the torque required
to
brea
k
each nut loose.
If
the torque required to break
the
smaller nuts
(on studs) is
less
than
300
Ib-in,
the
nut
should
be
removed
and
mica base
anti-
seize com
pound applied to th
e stud. Install the nut a
nd
tighten
to 350
Ib-in. If the nut does
not
tighten
to
this
torque, the
stud
is
stretching
and must be
replaced
(par. 5
7).
If
the torque re
quired to break the larger nuts
(on cross
bolts)
is less
than
65
0
Ib-in,
the
nuts
should be rem
oved,
antiseize
compound applied,
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and the
nut
tightened
to 750
Ib-in. If the nut does not tighten
to
this
to
rque, the
bolt
is stretching
and must be replaced.
After loosening all
nuts with the torque wrench,
remove
all
but
two n
uts on each cyl
inder. These nuts
will hold
the
cylin
ders in
position until they
are
re
moved from th
e
crankcase.
Using
engine turning
wrench 41-W-906
-130 (fig. 7), bring
the
piston
in number-one
cylinder
to top
center and
remove
the
two remaining nuts holding
the cylider
to
th
e
crank
case. Loosen
the cylinder by jarring
it with the hand, and remove
it b
y
care
fully pulling
straight out
unti
l
it
clears the mountin
g studs. Be
careful to prevent
the
connec
ting
rod,
cylinder, an
d
piston from
falling against the
crankcase mounting pad.
Before
removing
the
cylinder from the piston, place a
connecting
rod protector
41-P-2839-
535 (fig.
23) on
the rod to
prevent
possible d
amage
to
the
cylinder mounting
pad.
Then
remove
the
cylinder.
Support the piston and
slide
out
the
piston
pin. Pull
the
piston over
the top of the connectin
g rod. If
a
carbon deposit
makes it difficult
to
remove
the pin, tap it gently
with
a
wood
en
dowel.
Note th
e position of the
identifying
number
on
the piston
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boss
markin
g
on the piston
boss
is
normall
y to
the acce
ssory
c
ase
e
nd).
Install
the
piston pin
in th
e
p
iston.
P
istons
for No.
1
and
N
o. 2 cyli
nders
will be at
top
ce
nter
togeth
er.
T
herefore,
both cylinde
rs can
be
removed
without
turning the en
gine. Also,
No.
3
and No. 4
pistons
will be t
ogether a
nd No. 5 and
No.
6 piston
s wi
ll
be
together.
If
the
crankshaft
binds
after
som e
of
the
cylinders
are
removed,
repl
ace the s
lotted
nuts
on
th
e
c
rankcase
cross
bo
lts (H)
,
f
ig. 65
),
u
sing
crankcas
e cro
ss
bol
t s
traps 41-S-590
6-300
fi
g. 2 3) or
large
wa
shers
to
prote
ct
t
he m
achined surf
aces of
t
he cylin
der mounti
ng pads
a
nd tighte
n
the
nuts enoug
h to
release the
cranks
haft
binding.
/.
Remove
the rem
aining
cyli
nders and
pi
stons. M
ark any
cylinde
r or pi
ston if
the lo cat
ion id
entifyin
g num
ber is
not
legible
.
53
R e m o v al
of
Fl y w h eel
and
Fly w h eel
Tors io n
Dampe
r
(
.
2 4 )
a.
Re
move the
four
drille
d
hex-he
ad
bo
lts A)
ho
lding
the
spline
d to
rsion dam
per hu
b B)
to
the
damp
er
hub pl
ate H)
.
Remov
e the
hub.
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R e m o v e
the f lywheel
cover plate (C)
from the f lywheel
with
dowe l
pins
assembly (K) by removing the
12
socket-head self-
locking bol ts
(R) which hold
the
cover
plate
to the f lywheel. This
plate can
usually be removed by tapping around its edges with
a
soft
hammer.
Tapped
holes
are
provided
for
pusher
bol ts
if
it is
difficult
to remove. The torsion damper ring
(D)
wi l l c o m e
ou t with the cover plate.
R e m o v e
the
torsion damper
pressure
plate
(E)
and
the
tor
s i on damper friction disk (F). Then
r emove
the torsion damper
spring
driven
plate
(G), damper
hub plate
(H),
the remaining
damper friction disk (F) and the torsion damper spacer plate
(J). R e m o v e the drive
springs (M)
and the drive spring
seats
(N) from
the
f lywheel.
Disengage
the
f lywheel bolt locks
(L).
R e m ov e the
six
dril led-head bolts (P) from the
crankshaft
hub.
R e m o v e
the
f lywheel
from
the crankshaft
with
puller
screws 41-S-1044-125
(fig.
7).
The f lywheel and crankshaft carry
identifying
matching
numbers. The
position
o f the f lywheel o n
the crankshaft
is
located
by
one dowe l
pin
which
is 3°
off
the
normal
center
l i ne
posi t ion .
Thus, the
f lywheel wi l l
be installed in its original pos i t ion on
the
locating dowe l s .
54. Remova l o f Coo l i ng Fan Dr i ve
R e m o v e
the fan drive horizontal shaft (par. 51).
R e m o v e the slotted nuts and mach ine screws holding the fan
drive
oil
seal
housing
(K,
fig.
82)
to
the
crankcase.
R e m ov e
the
oil
seal
hous ing .
Lift the
fan
drive vertical shaft bearing housing (F) and
the
fan drive
vertical shaft (C,
fig. 82) from
the
crankcase.
Use
puller 41-P-2906-280
(fig.
26). Discard 0 ring
gaskets.
R e m o v e the vertical
shaft
bevel
gear (B)
and the
hozizontal
shaft
bevel
gear (S, fig.
82)
from their bearings in the crankcase.
R e m o v e
the
fan
drive
horizontal
shaft
hose
nipple
(V,
fig.
82) from the fan drive horizontal shaft bevel gear bearing (T) in
the
crankcase .
/. Remove the bolted fan tower plug (V, fig. 65), which faces
the f lywheel end o f the crankcase,
from
the bearing in the crank-
case .
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55. Removal
of
C
rankcase
Half and
Cranksha
ft
Assembly
(fig.
65)
Remove
the
lock bol
t
ho
lding the
fan
drive ho
rizontal sh
aft
bevel ge
ar bearing
(PP
)
in the cr
ankcase
opening. This
bea
ring
and the
fan drive vertical
shaft bearing
(UU) can be lifted
out
as the crankcase
halves
are
separated
below).
Att
ach crankcase
l
ifting eye
41-E
-615-350
(fig.
27)
to
the
crankcase.
R
emove t
he crankcase
from the en
gine assemb
ly
stand
by removing the nu
ts holding
the tran
smission adap
ter to
th
e
stand.
Place
the engine, with
oil
pan
flange down, on
su
it
able woo
den
block
s
on a di
sassembly table
.
Remove
the
12
cra
nkcase cross
bolts (
H),
th
e
tw
o special
dowe
l-type cran
kcase alinement bo
lts (AD) in
the flywheel
end
flange,
and the
one
special
dowel-type
crankcase alinement
bolt
(S
S) in the top flan
ge
at the accessory en
d.
Bolts
ca
n
be
driven
out of th
e
case
by
using a sof
t brass
drift
a
nd
hammer.
Turn th
e
cra
nkcase
over
on the
left
(2-4-6) side and lay
it on
wooden bloc
ks, allowi
ng
the
conne
cting rods to
ha
ng dow
n.
Remove
the remainin
g top flange
and
fan drive gear housing
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PULLERS
41-P-2906-28Q
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n
uts
an
d b
olts.
Ee
m ove
th
e sa
fety w
ire
an
d slo
tted
nu
t
(B
B)
from
the
stu
d in
th
e flyw
hee
l end
dia
phra
gm.
Lif
t
off the
to p
h
alf
o
r
t
he r
ight
(1
-3-5
) sid
e of
the
cra
nkca
se. D
o
not le
t con
nec
ting
rod
s fal
l a
nd nic
k fl
ange
sur
face
s.
L
ift
out th
e fan
dri
ve ho
rizon
tal
sh
aft
bev
el
gear
bear
ing
and th
e v
ertic
al s
haft be
arin
g.
/.
Attach
the
crankshaft
lifting
sling 41-S-3829-720
(fig.
28)
to lift
ing
eye 4
1-E-
615-
350
. T
ie the
c
onn
ectin
g
ro
ds in a
v
er
tical
p
ositio
n w
ith tw
ine
or wi
re
as sh
ow n
in
f igu
re 2
8.
Ra
ise
the
cra
nks
haft a
nd conn
ectin
g
rod
asse
m bly
h
igh
enou
gh
w
ith
a
c
hain
f
all
to rem
ove
th
e
cra
nksh
aft
mai
n bea
ring
s (
AP)
an
d
c
ran
ksha
ft
th
rust
m
ain
bea
ring
(
AQ)
.
Main
be
aring
s are e
tched
a
t inst
allatio
n. W
hen r
emov
ing be
arings
,
see
if the
orig
inal ma
rking
on the
ba
ck is
le
gible
.
If
not
, lenew
the
ma
rking
with
a
grease
pencil.
Never
mark
a
bearing with
a
metal instrument.
Plac
e t
he
cran
ksha
ft and
co
nnec
ting
rod as
sem
bly
on
w
ood
en
V
blo
cks fas
tene
d
to a w
ork
ben
ch so
the
cr
ank
shaft
r
ests
on
th
e tw
o e
nd main
bea
ring
jou
rnal
s.
68
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R emove
the conne
cting rod protectors f
rom
the
cra
nkcase
c
ylinder pa
d studs. Place
the crankcase halves
on suit
able w o
oden
blocks
so
the
machined faces
are
not
damaged.
Sec t io
n IV. REBUIL
D O F
ACCE
SSORY CASE
56.
Disas s e
m b l y
o f
Ac
cesso r y
Case
The
disassem
bly
steps
given
are
i
n a practi
cal
orde
r, but
the
sequence
giv e
n is
not
m
andatory
and may be a
ltered
to
suit conve
nience. Figures
30
and
52
show
the
accessory
case
assembled. Figures
35,
38,
and 39
show the exploded
view
s
of
the accessory
case. The
b
ronze
bu
shing-type bearings in th
e
a
ccessory case
must not be
removed
or
replaced
during engi
ne
disassemb
ly or o
verhaul
(
par. 57).
69
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A
F
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A—GEAR,
BEVEL,
CAMSHAFT DRIVE 7744888
B—GEAR, BEVEL,
CAMSHA
FT 7744898
C—I
MPELLER, DR
IVEN,
P
RESSURE PUMP 7403085
D—IMPELLER, DR
IVE,
PRESS
URE PUMP,
W/SHAFT
7403348
E—IMPELLER,
DRIVEN,
S
CAVENGER
PUMP
7
403087
P—IMPELLER, DRIV
E,
SCAVENGER
PUMP 7403086
G—GE A R ,
BEVEL,
PRESSURE P
UMP
7
346532
H—GEAR, BEVEL, FAN DRIVE VERTIC
AL SHAFT 7351158
J—SHAFT, FAN D
RIVE,
VERTICAL
7346599
K—GEAR, BEV
EL, FAN DRIVE HORIZONTAL
SHAFT
73511
90
L—SHAFT, FAN DRIVE, HORIZONTAL 7
346498
M—GEAR, FAN
DRIVE
73465
01
N—GEAR,
DRIVE,
IMPELLER
7376129
P—
GEAR, DRIVEN, IMPELLER 73758
43
Q — G E A R ,
BEVEL,
IDLE
R, DRIVEN, CAMSHAFT DRIVE
7375432
R—GEAR, BEVEL,
IDLER, CAMSHAFT DRIVE 7346544
S—SHAFT, DRIVE,
CAMSHAFT 7346568
T—GEAR,
BEVEL, GOVERNOR 7346542
U—GEAR, BE
VEL,
F
UEL PUMP 7346543
V— GEAR, BEVE
L, DRIVE, FUEL PUMP AND
GOV
ERNOR
7346541
W — G
EAR,
IDLER
,
CAMSH
AFT DRIVE 7346
547
X—GEAR, ACCE
SSORY DRIVE 7346526
Y—GEAR, DRIVE, POWER
TAKE-OFF 7346500
Z—GEAR, BEVEL, DRIVEN, STA
RTER, 7346548
AA—
GEAR, BEVEL, STARTER
DRIVE 7372687
BB—G
EAR,
BEVEL
,
SCAVENGER
OIL
PUMP 7372686
CC—SHAFT,
DRIVE, POWER TAKE-OFF 7346504
DD—IMPELLER, DRIVE,
SCAVENGER
PUMP
7403341
EE—IMPELLER, DRIVEN, SC
AVENGER
PUM
P
7403
342
FF—GE
AR, BEVEL, DRIVEN, GENERAT
OR
734
6503
GG—GEAR,
BEVEL, D
RIVE, GENERATOR 7346546
H
H—GEAR, BEVEL,
DRIVE
IDLER,
MAGNETO 7346520
JJ—GEAR, BEVEL, DRIVEN IDLER,
MAGNETO 7346521
KK—GEAR,
MAGNETO 7410051
LL—GOVERN
OR, SPARK
ADVA
NCE, ASSY 7767445
MM—GEAR,
BEVEL, DRIVEN,
MAGNETO,
W/INTEGRAL
SHAFT
7346538
NN—
GEAR, IDLER, ACCESSORY DRIVE
7346549
PP—GEA
R,
BEV
EL, DRIVE, MAGNET
O
7346550
Continued
71
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LINK
AGE-
CONTR O L
(1) Remove the
19
jam nu
ts,
plain
nuts, and plain washers
holding the
supercharger
hou
sing to the accessory
case.
Using puller
41-P-2906-280
(fig.
31),
remove
the
hous
ing from the studs and disc
ard the 0
rin
g gasket
(G, fig. 49).
(2)
Remove
the
impeller
nut lo
cking
ring
(H)
and
the im
peller
nu
t lock (J)
from
the
impeller lockin
g
nut
(K)
(
f ig .
49). U
sing wrench 41-W-1536-235
(fig. 51),
re
move the
impeller
nu
t. Remove
plain
washers (R,
fig.
49).
(3)
Remove
the
supercharger
impeller
(L,
fig.
49)
from
the shaft of
the
impeller driven
gear (HH, f
ig. 38),
using
wrench
41-W
-1536-240 (fig. 32). Remove the
imp
eller shims (M , fig. 49) and the
impeller
space
r (A,
fig. 38).
72
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(4)
R e m o v e
the six
hex-head bolts
(N)
and tab washers (P,
fig. 49). R e m o v e the supercharger
diffuser
(Q, fig. 49),
using puller
41-P-2906-280
(fig.
33). Discard the 0
ring gasket.
(5)
R e m o v e
the
accessory case
diaphragm
assembly, in
cluding
the impeller driven
gear (HH, fig. 38). R e m o v e
the
safety
wire, drilled hex-head bolts (E) and plain
washers (F)
holding it to the accessory
case. Use
puller
41-P-2906-280
(fig. 7),
if necessary, to l o o s en assembly
from
the accessory case .
(6) R e m o v e
the
two slotted nuts and
plain
washers and re
m o v e the impeller
driven gear roller bearing retaining
plate (NN,
fig.
38).
R e m o v e
snap
ring (PP)
from
the
accessory case. R e m o v e the outer race o f the impeller
driven
gear
(inner
and
outer
race) roller bearing (JJ).
(7) Withdraw the impeller drive gear (P), with the impeller
drive and
fan
drive
gears
roller bearings
(M) as
an
assembly, from
the fan drive gear
outer bearing
liner
(S).
R e m o v e
the impeller drive
shaft (Q, fig.
38).
73
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(
8)
R
em
ov
e th
e sa
fe
ty wir
e
a
nd
s
ix s
lott
ed
nu
ts fr
om
th
e
f
an
dr
ive
g
ear
o
ute
r
be
arin
g
lin
er
ass
em
bly
, an
d r
e
m
ove
t
he
as
sem
bl
y u
sin
g p
ull
er 4
1-P
-29
06
-28
0
f
ig .
7).
Th
e li
ner
ass
em
bly
c
ons
ists
of th
e
fa
n driv
e
g
ear
T)
,
t
he
im
pe
ller
a
nd
fan
d
riv
e gea
rs
roll
er
bea
rin
gs
M
),
and
the
fan
drive
gear outer bearing
liner
(S ,
fig .
38).
9
) Rem
ov
e
inte
rn
al sn
ap
r
ing
D
).
W
ith
dra
w th
e
fan
d
rive
g
ear
oil
s
eal
hou
sin
g U
)
an
d the
fan
d
riv
e g
ear
oil
se
al
(W
) as
a
n as
sem
bl
y
fi
g . 38
).
(1 )
Re
mo
ve
th
e
inte
rn
al sn
ap
rin
g fr
om
the
a
cce
sso
ry
driv
e
ge
ar
(T
,
fig
.
39
).
(2
)
Be
nd
u
p
th
e
tab
s o
f
t
he
ac
ces
sor
y
dri
ve g
ea
r be
ari
ng
nu
t lo ck
(
RR
, f
ig . 3
8).
R
em
ov
e
t
he
a
cce
sso
ry
driv
e
ge
ar
b
ea
ring
n
ut
,
fig .
38)
,
w
ith
w
re
nch
41-
W-
43
0-2
75
fig
.
34)
,
by
st
rik
ing
th
e
to
ol h
an
dle
sha
rpl
y
wi
th
a
ham
m
er.
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3)
P
u
ll t
he
a
cc
es
so
ry
dr
ive
g
ea
r
T
,
f
ig
.
3
9)
an
d
th
e
ac
ce
s
so
ry
dr
ive
ge
ar
be
ar
in
g
sp
a
ce
r (R
)
t
hr
ou
g
h th
e
sm
a
ll
a
cc
es
so
ry
dr
ive
g
ea
r
ro
lle
r
b
ea
ri
ng
S
S,
fi
g.
38
)
b
y
ta
pp
in
g
i
t
w
ith
a
s
of
t
h
am
m
er
.
Re
m
ov
e
th
e sn
ap
rin
g
(T
T)
an
d
t
ap
th
e
be
a
rin
g
g
en
tl
y.
R
e
mo
v
e it
fr
om
th
e
re
ar
s
id
e
of
the
ac
ce
ss
or
y
c
as
e.
1
)
R
em
o
ve
the
le
ft
(2
-4
-6
)
sid
e
ca
m
sh
a
ft-
dr
iv
e
ho
u
sin
g
Z
, fi
g.
53
)
by
re
m
o
vin
g
th
e
f
ou
r j
am
n
ut
s,
pla
in
n
uts
,
an
d
p
la
in
w
as
he
rs
ho
ld
in
g
i
t to
th
e
ac
ce
ss
or
y
ca
se
.
Li
ft
th
e
h
ou
si
ng
f
ro
m
t
he
st
ud
s.
D
is
ca
rd
th
e
0
r
in
g
ga
sk
e
t.
2
)
Re
m
ov
e th
e
c
am
s
h
aft
-d
ri
ve
i
dl
er
b
ev
el
g
ea
r
A
, f
ig .
39
),
t
he
ca
m
sh
af
t-d
ri
ve
id
le
r d
riv
e
n b
ev
el
g
e
ar
(B
)
w
i
th
t
he
in
ne
r
oil
transfer
plug
(C),
and
the camshaft-drive idler
(s
pu
r)
g
ea
r
K
) f
ro
m
th
e
le
ft
(
2-
4-
6)
sid
e.
3
)
Re
m
ov
e
th
e
ri
gh
t
(1
-3
-5
)
s
ide
c
am
s
ha
ft-
dr
iv
e
h
o
us
in
g
D
, fi
g.
54
),
w
h
ic
h in
cl
ud
es
t
he
go
v
ern
o
r
an
d
fu
el
p
um
p
be
ve
l a
nd
d
ri
ve
n
ge
ar
s
an
d t
he
fu
el
-p
um
p
-d
riv
e
a
da
pt
er
7
5
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AA
, f
ig. 4
5),
by re
mov
ing
the
fo
ur
jam
nu
ts, p
lain
nu
ts,
an
d plai
n w
ash
ers
ho
ld in
g i
t
to
th
e ac
cess
ory
ca
se.
Li
ft
t
he ho
usi
ng
as
sem
bly
fro
m th
e s
tuds
a
nd di
scar
d
0
ri
ng
ga
sket
.
4)
R
em
ove
the
cam
sh
aft-d
riv
e id
ler b
evel
gea
r
A, f
ig. 39)
,
the
cam
sha
ft-d
rive
id
ler
dr
ive
n b
eve
l
g
ear
(B)
with
th
e
in
ner o
il
tr
ans
fer p
lug
(C
),
and
the
cam
sh
aft-d
riv
e idle
r
(s
pur)
ge
ar (
K)
fro
m the
rig
ht
(1-3
-5)
sid
e.
1)
Rem
ove
the
m
ag
neto
driv
e
ho
usin
g as
sem
bly
f
ig .
36)
b
y
re
mo
ving
th
e
ja
m
nu
ts,
plai
n nu
ts,
and
pla
in w
ashe
rs
holding
it
to
the
accessory
case.
Lift
th
e
assembly
f
rom
t
he
stud
s
and
di
scar
d th
e f
lat
ga
ske
t an
d
0
r
ing
gask
et.
'T
IMER
,TA
N
TAK
E-OF
F-
(740
3367
RA P
D
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A—FILTER,
OIL, ASSY
7539861
B—HOUSING, OIL CONTROL, ASSY 7375872
C—PLUG, DRAIN, MAGNETIC
7375426
D—GASKET, DRAIN
PLUG 105456
E—SWITCH, SENDING, OIL LOW
PRESSURE, WARNING LIGHT
7321327
F—ELBOW, PIPE
7744713
G—ADAPTER,
BREATHER,
W/LIFTING
EYE, ASSY 7376017
H—SWITCH, SENDING,
HIGH
TEMPERATURE,
WARNING LIGHT
7386295
J—PLUG, PIPE
7767337
K—ELBOW,
PIPE
7410085
L—BUSHING, PIPE 7410086
M—UNIT,
SENDING, OIL HIGH
PRESSURE
GAGE 7321347
N—PLUG, PIPE
7538990
P—HOUSING,
MAGNETO
DRIVE, ASSY 7346516
Q—HOUSING,
CAMSHAFT DRIVE,
LEFT (2-4-6)
SIDE 7375422
R—DRIVE,
GENERATOR, ASSY
7403467
S—PLUG,
PIPE 7338670
T—GASKET, ACCESSORY CASE
TO CRANKCASE 7346527
U—GASKET,
O
RING
501225
V—LINE, SCAVENGER
OIL PUMP OUTLET
7375419
W—RING, SNAP 7410378
X—LINE, SPILL 7346642
Y—GEAR, BEVEL,
SCAVENGER OIL
PUMP
7372686
Z—DRIVE,
STARTER, ASSY
7414504
AA—HOUSING,
CAMSHAFT DRIVE, RIGHT (1-3-5) SIDE
7375420
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2)
Re
mov
e the
spa
rk a
dva
nce
gov
erno
r cou
plin
g
W
)
and
the
spa
rk
adv
anc
e go
ver
nor
ass
em b
ly
(X
) f
rom
th
e m
ag
ne
to
driv
en
bev
el ge
ar
w
ith
inte
gra
l
sha
ft (EE
,
fig
.
4
4).
3)
Re
mo
ve the
sa
fet
y
wire
a
nd sl
otte
d n
uts
an
d li
ft
out
th
e
magneto drive
n
bevel
ge
ar
w
ith
int
egra
l
sh
aft (E
E)
and
dr
ive
n
be
vel
gea
r
ada
pte
r
DD
, fig
. 4
4).
Us
e p
ulle
r
41
-P-
290
6-2
80
fig.
7)
to re
m o
ve
ad
apte
r fr
om
b
ore
in ac
ces
sor
y
case
.
4
)
Re
mov
e
th
e
ac
cess
ory
dr
ive
idle
r ge
ar
sh
aft
p
in
bol
t
N,
fig.
39)
an
d
wa
she
rs. W
ithd
raw
t
he
ac
ces
so ry
driv
e
idle
r g
ear
sha
ft Y
)
and
li
ft o
ut th
e a
cce
sso
ry
dri
ve
id
ler a
nd
ma
gne
to
driv
e b
eve
l gea
r a
sse
m bl
y
U
) a
nd
(V
).
/
.
(1)
R
em o
ve
the
oil
c
ont
rol
ho
usin
g in
let
co
nn
ecto
r (N
)
an
d
tra
nsm
iss
ion
coo
ler in
let an
d
co
ntro
l hou
sing
ou
tlet
c
on
nec
tor
B
,
fig.
86
)
by rem
ov
ing
th
e ja
m
nut
s, p
lain
n
uts
,
and
pl
ain
w
ash
ers
h
old
ing
the
co
nne
cto
rs
to
the
con
trol
ho
usin
g.
MA
GNE
TO
DRIV
E
78
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I
f
th
e
oi
l c
on
trol
v
alv
es
w
er
e
no
t rem
ov
ed
pr
ev
iou
sly
(
par
.
the
y
sho
uld
b
e
l
oos
ene
d w
ith
wr
enc
h 4
1-W
-3
727
-3
3
(f ig
.
15
)
be
for
e
the
oil
co
ntro
l
ho
usi
ng
s
r
em
ove
d fr
om
th
e a
cce
sso
ry
c
ase
.
(
2)
Re
mo
ve
th
e
oil
c
on
tro
l
hou
si
ng
(f
igs
. 3
5 a
nd
4
6)
by
re
mo
vi
ng
th
e
s
af
ety
w
ire
,
fou
r
j
am
nu
ts
an
d p
la
in
nu
ts,
fiv
e
dr
ille
d-
he
ad
bo
lts
an
d
nin
e
pl
ain
w
ash
er
s.
S
lid
e
the
housing
off
the
studs.
Discard the
gasket.
R
e
mo
ve
th
e
sta
rte
r dr
iv
e
ass
em
bl
y
(Z
, fig
.
35
) b
y
rem
ov
in
g
th
e
jam
n
uts
,
pla
in
n
ut
s,
an
d
pl
ain
w
a
she
rs
ho
ld
ing
the
a
ss
em
bly
to
the
a
cc
ess
or
y
ca
se
. U
sin
g
p
ul
ler
sc
rew
s
7
08
374
0
(f
ig. 3
7),
pu
ll t
he
a
ss
em
bl
y
fro
m
t
he
stu
ds
.
D
is
ca
rd th
e
0
rin
g ga
ske
t.
(f
ig.
35
).
R
em
o
ve t
he
g
en
er
ato
r dr
ive
a
sse
mb
ly
(
R)
,
by
re
m
ov
ing
th
e
jam
n
ut
s,
pla
in
nuts, and plain
washers
holding
the
assembly
to the
accessory
cas
e.
Us
in
g
pul
ler
sc
rew
s
7
08
374
0 (
fig
.
7
) an
d re
mo
ve
the
a
ss
em
bly
fro
m
t
he
stu
ds
.
D
isc
ard
t
he
0
r
ing
ga
sk
et.
(fig
.
38
).
(1 )
Re
mo
ve
th
e
pow
e
r
tak
e-
off
dr
ive
co
ver
(
EE
) by
re
m
ov
i
ng
the
bol
ts
a
nd
wa
sh
er
s
ho
ldi
ng
it t
o th
e
a
cce
ss
ory
79
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case.
Ta
p
t
he cover
gen
tly
with a
soft hamm
er to
loosen
it on
the
gasket
. Discard the
gaske
t.
(2) R
em ove
the
p
ower ta k
e-off
drive
adapter (C
C) and
power take-of
f drive
shaft (AA)
by tap
ping lightly w
ith
a
soft
hammer fro
m the crank
case s
ide. Re
move the
power take-off
drive
gear
(H,
fig.
39), the
starter
driven
bevel gea
r G), and
the starter
driven
bev
el
gear
ball
beari
ng (D)
as an
assem
bly. Discard the
0 ri
ng
gask
et.
fig. 35).
Remove
the
s
afety
w
ire
and three
s
lotted nu
ts holding
the br
eather a
dapter with
lifting eye
as
sem bly
(G)
to
the
acces
sory c
ase.
Remo
ve
the asse
m bly. Disc
ard the
gaske
t.
(fig.
35).
Using
crowfoo
t wre
nch 708385
2
(fig
.
7
),
remove the
following
se
nding
unit a
nd sending swi
tches, includ
ing
pipe elbow
s F
)
and (K)
and
pipe bus
hing L):
(1) Oil high press
ure g
age sending
unit
M).
(2)
H
igh t
emperatur
e w
arning light se
nding switch
H)
.
(3) Oil low p
ressure
wa
rning light
s
ending
switch
E).
57. Cleaning
I n spec t i on
and
Repa i r
o f
Accesso ry
Case
Or
dnance m
aintenanc
e personn
el must thorou
ghly
u
nderstand
the
imp
ortance
of clean
ing engine
par
ts. Extreme
care
and
co
nscientiou
s effort
are requir
ed
in
al
l
cl
eaning op
era
tions. The
presence
of dir
t
or
for
eign
subst
ances is a cons
tant
t
hreat to
satisfacto
ry engine ope
ration.
A
ll
par
ts must
be cleane
d
b
efore inspe
ction, aft
er re
pair, and befor
e assem bl
y.
A
fter clean
ing, all
parts shou
ld
be
prote
cted
fr
om d
ust and
grit. Th
e inner
and
outer surfaces
of
all
castings
and
all
parts
subject to
oil
lub
rication mus
t
be cleane
d
w
ith dr
y-cleaning
solven
t or
volatile
m
ineral spirits.
Particula
r
atten
tion must
be
paid to
all
oil
pa
s
sages in b
oth casting
s and ma
chined
parts.
W
hen n
ecessary, wir
e
o
r probes
must
be
use
d to
break up
all sludge or
gum deposits
an
d
a
dmit the
clean
ing solv
ent. Wash
passages
thorou
ghly with
clea
ning
solvent. Pas
sages must
be
blow
n out with comp
ressed
a
ir to free
them
f
rom
all foreig
n
p
articles.
Passage
s and op
en
ings
can
be
checked
for
being
open
and clear
as
air
passes
through
t
hem .
(1)
Check
th
e castings
fo
r
cr
acks, pa
ying
particula
r
at
ten
tion to are
as adjac
ent
to
s
tuds, pipe pl
ugs, and
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Rosan
inserts
. Cracks are freq
uently
found at sharp
corn
ers
a
nd f illets.
Replace casting
s
showing a
ny
e
vidence of
cracks.
(&
) Caref
ully examine all mati
ng surfaces
and
mo
unting
flanges
for n
icks
or deep scratches.
Remo ve all b
urrs
or
raised metal with
a
fine
m ill
file.
Wat
ch
for
lo cal d
iscolorations o f mating
flang
es as
they
often
indicat
e persistent
oil leak s. Test al
l such
flanges with a str
aightedge
or o n a
surface
plate.
Parts
with
warped flanges
or mounting pads sho
uld
be
repla
ced.
Examine
all pi
pe
plug openi
ngs
for
torn
or
damaged
threads
. C
lean up threads with
an old pipe
tap so
threads
are
not
cut
oversize.
If
threads
do
not
clean
up, tap the hole to
the
ne
xt larg
er size
plug. Threa
ds
must
be
in
good condition
to
eliminate oil leakage.
(2)
Inspect the Rosan
lo c
k thread s
crew
in
serts
in
the alumi
num cast
ings
fo
r signs o f lo
oseness
and g
alled
or
p
ulled threads.
R eplace
any defective
ins
erts.
To permit
higher s
tresses in
studs and bolts
w hich
are set
in
alumin
um castings, i
t is com m o n
practice
to
install i
nserts o f a stron
ger m
etal into
which
the
stud
s or bolts are t
hreaded.
Rosan
inser
ts
are
screwed
into
the softer
castings until they
are
slight
ly below
the
s
urface. When
the insert
is set, a lock
ring,
broached
to fit
the
splined end of
the insert,
and
coar
se m
illed on the outer
edge,
is driven
into
a
counter
bore.
T
his lock ring p
revents a
ny
t
urning
o f the thread
ed insert.
To remove
an insert,
drill out
the
cen
ter with a dr
ill
sligh
tly smaller than the inner se
rrations, to
th
e
depth o f the
lock
ring. Back out the
insert
w
ith a
remover.
T
he insert will pu
sh the lock
r
ing out.
Rosan
insert
wrenches and
drivers
(table I
and
fig.
7)
are short
hexagonal piec
es having an int
ernal
splin
e
to
fit
the in
sert. Select the
proper si
ze
a
nd
turn
the inse
rt into the casting,
slightly below
the
s
urface. Place a new
lock
r
ing in
position
an
d
center
it over
the insert with
the correc
t
Rosan
8
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dri
ver. Drive
the
lock ring
into the
ca
sting slightl
y
below t
he s
urface.
3)
I
nspect all s
tuds fo
r damag
ed thr
eads.
M inor da
mage ma
y be
correc
ted wi
th a
standard
thread
chaser. Studs
with stripped
threads,
bent
or
loo
se stud
s,
or
studs
s
howing
an
y
e
vidence
of
st
retch
ing m
ust be
repla
ced.
Ba
ck stu
ds
out
s
lowly
to avoid
heating
and
possible
se
izure. Bro
ken
studs,
too shor
t
to be
rem
oved
with a wrench,
may
be drilled
and
ex
tracted
with
a remo
ver.
If
i
t
is
imp
ossible to
re
move
them by
this
m
ethod, a
p
iece
of ba
r stock
o
r a
nut
may
be
welded
to
the
stud and
then
removed
with
a
wrench
Thi
s
m
ethod
mus
t
be
u
sed with
care to avoid
dam
age to t
he
housi
ng.
(c)
Clean
out
tap
ped
ho
les.
Use an
old tap
ift
hreads
appear to be i
n go
od conditi
on. A
new
tap may
cut ov
ersize.
Inspec
t the
threads
. If ther
e is
any
i
ndicatio
n
of
stri
pped
or
damag
ed
thre
ads,
or
if
the
stud
was
removed
for
looseness,
tap
the
hole
to
the ne
xt
la
rger
oversiz
e.
Over
size s
tuds
are supp
lied
for replace
ment
(tab
le
II). St
uds
(
fig. 9
4) ar
e
m
arked on
th
e
ho
using
end
to indi
cate
wheth
er they
ar
e standa
rd or o
versize.
Chec
k the
mar
king to be su
re t
he replace
ment i
s
of
the
pr
oper size.
Be sure
the c
orrect
end is
thre
aded in
to the
ho
using. N ot
e tha
t
th
e stud
threads are
of
different
size,
the
coarser
thread
being
the h
ousing e
nd.
A sm
all
amount
of
mica
bas
e
an
tiseize
compou
nd
shou
ld
be
applie
d to
the thre
ads
before in
stalling
studs. Drive
stu
ds in slowly
to
p
revent hea
ting.
O
bserve
the
setting
height as
g
iven
on
st
ud c
hart
table
II).
W
hen,
f
rom any cause
, the
tapp
ed
h
oles in
castin
gs
are
damaged
beyond salvage by
oversize
studs,
fit
the
m wi
th
heli
coil
inse
rts
or
Rosan
inse
rts and
in
stall n
ew s
tuds of
the origin
al size
. For
the m
ethod
o
f
install
ation a
nd
rem
oval of
helic
oils, refe
r to the
para
graph
6 4. For
method o
f
replac
ing
R
osan
in
se
rts, see (2
)
a
bove.
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(4)
If
m
agnaflux testing
equipment is
available,
check all ge
ars by this method. R
eplace those in which
cra
cks
are
found.
Ex
amine all gear teeth for
sharp
f
ins
or
burrs
at
tooth
corners and for galling
or
pitti
ng, on
the tooth faces. Gears
which
indica
te wear on the
gear
teeth shou
ld
be
assembled
in
po
sition in their mat
ing
bearings. With feeler gages, chec
k gear backlash
be
tween two meshing
teeth.
Chec
k all gears
to the
lim
its
specified
in
re
pair and
r
ebuild standards (par.
141).
Remove
any slight nick
s or
burrs
from gear teeth
with
a hard oil stone. Polish
with
crocu
s cloth wet
in dry-
cleaning
solvent
or
vola
tile mineral spirits.
Thoroughly
clean the re
paired
parts before
assembly .
(5)
Check
all
spline
teeth for
galling,
chipping and
wear.
The
fit
with
th
e mating part must
be free
of
any
binding. Stone-off
any slight rough
spots or
burrs
.
Polish
with crocus cloth.
(6
) Check all
shafts by magnaflux if available
.
If
this equipment is
not
availabl
e, inspect all
shafts with
a
magnifying
glass
for cracks
. If
crack
s are discov
e
red, the
shaft m
ust
be
rep
laced.
Raised metal at n
icks
or
scratches
should
be
stoned-off
and
polished
with
crocus
cloth. C
heck shafts
to the limits specified in repair
and rebuild standards (par.
141).
(7)
After
bearings
hav
e
been
cleaned thoroughly, spin
them and check
for
audible
eviden
ce of roughness
and wear.
Check
b
earings for wear of
the inner and outer races
by
sup
porting
the
inner
race and
torsionally
checking
the
bearing f
or
end
clearance.
Che
ck all bearings to the
limits specified in repair
and rebuild s
tandards (par.
1 4 1 ).
Rough or worn bea
rings must
be
replaced.
Check a
ll bearings carefully for looseness in
the
hous
ing and
for
evidence of h
eating.
Heating
is an
indi
cation
o
f insuff
icient lubrication. Examine the
oil
passages in
the
accessory
case
and
be
sure
they
are clean.
Loose or
damaged bearings are cause
for
the acce
ssory case to be
rejected,
as
these bear
in
gs cannot be
successful
ly
repla
ced in
the field.
Check all bea
rings to the limits
specified
in repair
and rebuild stan
dards (par. 141
).
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Check the thrust faces
of
bearings
for
wear and
ob
vious
damage. The wear can be
determined by
the
assembly o f
the mating
parts in their
proper
place,
and checking end play, using a feeler gage
be tween
the
thrust faces . Check all bearings
to the
l imi ts
specif ied
in
repair
and rebuild
standards
(par.
141) .
(8)
See that oil passages in the
accessory case are clean. There are pipe
plugs
in all
passages which can be removed, and the passages and
openings can be tested with air. It is important
that
all main
passages
and
passages to bushing-type
bearings
be open .
(9)
Inspect
all accessory
drive
assembly
and
cover
plate castings.
Check
for
loose or damaged drive
assembly
bearings. R eplace dr ive
assemblies
when
either the bearing or
drive is
damaged.
Use a f ine
mil l
file to r emove any
raised
metal resulting
from n icks or scratches o n bearing areas.
58.
R e b u i l d o f
Accesso ry
Case Subassemb l i es
(fig. 38).
(1)
R e m o v e
the safety wire
and
six
drilled-hex-head
bolts
from
both halves o f
impeller driven
gear ball bearing
retaining
plate (L)
for
the
impeller driven
gear
du
plex ball
bearings
(H).
(6)
Press the
impeller driven
gear (HH) and the duplex
bearing ou t
of
the accessory
case diaphragm
assem
bly
(G).
Gent ly tap
the
impeller driven gear
oil
sea l hous ing
(C)
and
r emove
it
from the diaphragm
with
the
im
peller driven gear carbon oil
seal
(B).
Press ou t the
oil
seal.
Press the
duplex impel ler driven
gear
ball bearings
(H) and their inner and outer
bearing
spacers (J)
and (K) from the
impeller end o f
the
driven
gear .
R e m o v e the wire bearing
l o ck i ng nut lock
l o ck ing ring
(MM) and
the impel ler
driven
gear bearing
l ocking
nut
lock
(LL)
from the
other
(gear)
end o f
the
driven
gear. Using wrench 41-W-1536-235
(fig.
7), remove
the
impeller
driven gear bearing
l o ck ing nut (KK).
Press
the
inner race o f the impel ler driven gear (in
ner and outer race) roller bearing
(JJ)
from the
driven
gear.
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(/) Press
the impeller and fan drive
gears roller bearings
(M) off
both ends o f
the fan drive
gear
(T) and the
impel le r drive gear (P).
R e m o v e the internal snap
rings
(N) from the fan
drive gear and
the impeller drive
gear.
(2)
Clean all parts
thoroughly
with dry-clean
i ng
solvent or
volati le mineral
spirits.
Inspect
gears
and
shafts by magnaf lux.
If this me thod is
not available,
inspect them with
a
magnifying glass for
cracks.
Cracked
parts
must
be replaced. Examine
gears for abrasions
on
tooth
faces
and
for
burrs
o n
tooth corners. Examine
the
shaft
for
scoring and
gall ing. Examine
bearings
and
replace any which
appear
to be defec t ive .
The
impeller
driven
gear
duplex ball bearings (H) are in
sets,
and
a defect in
either
o n e
is
cause for replacement of both
units o f the combination. The inner and outer bearing spacers
(J) and
(K)
are in sets, and if either o n e is defective a
n e w
set
must be installed.
Check parts to
the
limits specif ied in repair and re
build
standards (par.
142) .
(c)
Mino r scratches and
abrasions
c a n be
r emoved
with
c rocus c lo th wet with dry-cleaning solvent . Scratch
es
o f any kind are dangerous and
may
lead to fail
ure.
If
there
is any
doubt
as to the
serviceability
of a part, replace it.
The
s lots in
the
impeller driven
gear bearing
l o ck ing
nuts are originally
cut
c lean
and
sharp.
Do
not
attempt to repair a nut. Replace it.
The bushing-type bearings in the accessory case
dia
phragm
assembly
(G) are
machined
as part
o f
the
accessory case and are
not
replaceable in the
field.
Rep lacemen t
of the diaphragm requires replacement
o f the accessory case .
The
impeller
driven gear
carbon
oil
seal
(B)
must
be free
o f cracks,
nicks and
signs
o f wear.
The
seal
cannot
be repaired
and any defect
no t ed
is cause
for replacement. If in doubt
as
to
the
serviceability
o f
the seal, replace
it.
Repair or replace
Rosan
inserts (par. 57).
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0
0
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A—SP
ACER,
IMP
ELLER 73
48547
B— S
EA L, OI
L, CA RB
ON,
IM
PELLER DR
IVEN
GEA
R 7374219
C— HOU
SING,
IMPELLER
DRIVEN
GEAR
OIL SEAL
7348548
D—RING,
SNAP—
7750326
E—BO
LT, D
LD-HEX-HD
7416581
P—WASHER,
PLAIN
50 224 5
G—
DIAPHRA
GM,
ACCESSORY
CASE,
A
SSY
7403362
H—
BEARING
,
BALL
, DUPLEX,
IMPELLER
DRIV
EN G
EAR 7338680
J—S
PACER,
BEARING,
INNER
7
372698
K
—SPACER
,
BE
ARING, OUTE
R
7372699
L
—PLATE,
RETAI
NING, IMPELLE
R DRIVEN
G
EAR BA
LL
BEARI
NG
7403
369
M—B
EARING, R
OLLER, IMPE
LLER
AND FAN DRIV
E
GEARS 712170
N—
RING, SNAP 7725549
P—GEAR, DRIVE,
IMPELLER
7376129
Q—SHAFT,
DR
IVE, IMPEL
LER
7376058
R—NU
T,
SL
TD 225
869
S—LINER,
FAN
DRI
VE GE
AR
OUTE
R BEARIN
G 74
03357
T—GEAR
, FAN DRI
VE
7346501
U—HOUSIN
G,
FAN
DR
IVE GEAR
OIL
SEAL 74
03363
V—
PIN,
LOCATING,
FA
N
DRIVE
GEAR OIL SEAL H
OUSING
733
8668
W—SEAL
,
OIL,
FAN DR
IVE G
EAR 737541
0
X—CAS
E, ACCESSO
RY,
ASSY 737600
6
Y—GASKET,
0
RING
501219
Z—RING, SNAP—
583393
AA
—SHAFT,
D
RIVE, P
OWER TA
KE-OFF 73465
04
BB—GASK
ET,
O R
ING 546881
CC—ADAP
TER,
P
OWER TA
KE-OFF
DRIVE 74033
67
DD—GA
SKET,
COV
ER
7346657
E
E—COVER,
POW
ER TA
KE-OFF D
RIVE 734
6656
FF—
BOLT, D
LD-HEX-H
D 7346712
GG—BOLT
, DLD-HE
X-HD
7346698
HH—GEAR, DRIVEN,
IMPELLER
7375843
JJ—
BEARING
,
R
OLLER, IMP
ELLER DRI
VEN
GEAR
(INNER A ND
OUT
ER RACE)—
7375367
KK
—NUT,
LOCKING
IMPELLER
D
RIVEN
GE
AR BEARING
7410168
LL—LOCK
,
BEAR
ING
LOC
KING
NUT
74
10169
M M— R
ING,
LOCKING BEA
RING
LO
CKING
NUT
LO
CK 7338
666
NN—P
LATE,
RETAIN
ING,
IMPELLE
R
D
RIVEN
GEAR RO
LLER
BEARING
73754
18
PP—R
ING, SNAP— 5
83321
QQ— NUT,
REARING,
A
CCESSORY
DRIV
E GEAR
7346508
RR—
LOCK,
ACCESSOR
Y
DR
IVE G
EAR
BEARI
NG NU
T
7346507
SS—
BEARING
,
R
OLLER, ACCE
SSORY DR
IVE
GEAR, SMA
LL 7 34 6 67 7
TT—
RING,
S
NAP—5833
43
Continue
d
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A—GEAE, BEVEL, IDLE
R, C
AMSHAFT DRIVE
73 46544
B—GEA
R,
BEVEL,
DR
IVEN, IDLER
,
CAMSHAFT
DRIVE 7
375432
C—PLUG
,
O
IL TRANSFER,
IN
NER 7744669
D—BEARI
NG, BALL,
START
ER
D
RIVEN BEVEL
GEA
R 7
346682
E—SHIM
7346
68 3
F—BOLT,
DLD-HEX
-HD 58 3762
G—
GEAR,
BEVEL,
DRIV
EN STA
RTER 7346548
H—GE
AR, DRIVE,
POWER TAKE-O
FF 7346500
J—N
UT, SLTD 770
3684
K
—GEAR, IDLER, CAMSHAF
T
DRIVE 73465
47
L—
CASE, ACCESSO
RY, A
SSY
7
37 600 6
M—WAS
HER, LO
CK
12021
4
N—
BOLT,
PIN, IDLER
GEA
R SHAFT
7375435
P—WAS
HER,
PLAIN 502245
Q—KIN
G, SNAP 583313
R—
SPACER,
BEARING
,
ACCES
SORY DR
IVE GEAR
73 46491
S—BEA
RING, ROL
LER, AC
CESSORY DRIVE
GEAR,
INNER AND OU
TER RA
CE
LARGE 73
46676
T—GEAR, ACCESS
ORY
DRIVE
7346526
U—GEA
R,
IDL
ER, ACCESS
ORY
DRIVE 734654
9
V—GEAR, BEVEL, D
RIVE, MAGNET
O 7
346550
W—GEA
R, BEVEL,
DRIVEN, W/INT
EGRAL SHAFT 7346
538
X—BO
LT, DLD-HE
X-HD 58859
8
Y—SHAFT, ACCE
SSORY
DRIVE IDLER G
EAR 7348546
Z—SH
AFT, A
CCESSORY
DRIVE
7346
49 2
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(3) (fi
g. 38).
Press the inner
race of the im
peller driven gear (inner
and
outer
race) rolle
r bearin
g (JJ) on the
short
(
gear) end of the impe
ller driven
ge
ar (HH).
(6
) Install the im
peller d
riven
gear bearin
g locking
nut
(KK), u
sing wrench 41-W
-1536-235
(fig.
7),
and
torque to
700 Ib-in. If
the
lock slots in the
nut
do
not
line up
with
the lock slo
ts in the im
peller driven
g
ear
it will be necessary
to
la
p
t
he seating
surface of
the nut until
the slots
do line up at 700
Ib-in t
orque.
The impe
ller driven
g
ear be
aring
locking nut lock
(LL)
m
ust not be fo
rced into the lock slot
s in the nut
and in the d
riven
gear.
Insta
ll the nut lock
and
bear
ing locking
nut
lock
locking
ring
(MM).
(c)
Place
one
of the impe
ller driven
gea
r duple
x ball bear
ings (
H)
on
the
splined
end
o
f
the
impelle
r
driven
gea
r with the thrust s
ide
(so
marked)
away from the
gear end. Place t
he impeller driven gear in
ner
and
outer
bearing
spacers
(J) an
d
(K)
on the thrust s
ide
o
f the bearing.
Place the other half
of the
duplex
bearing on
the im
peller driven gear
with the thrust
side
engaging
the
inner
and
outer
spacers.
Center
the outer
s
pacer
between the bearings
to eliminate
inte
rference
when
ins
erting
bearings and
th
e impeller
driven
gear i
n the bushin
g-type bearings
of the dia
p
hragm.
Insert the impel
ler
d
riven gear and bea
ring assem
bly
in the acces
sory case diaphragm
assembly
(G) by tap
ping lightly with a so
ft ha
mmer.
Install the
im peller
driven
gear
ball
bearing retaining
plates (L) with
six drilled-hex
-head bolts (G G
) and
safet
y wire.
(/) I
nstall one of the two
sna
p
rin
gs
(
N) in the fan
drive
gea
r (T)
and
the othe
r in t
he impelle
r drive gear
(P).
Install two
of
the fo
ur impe
ller and fan
drive
g
ear
roller bearings (M )
on the fan
drive gear
and the
remaining
two
on
the
impeller drive gear.
These
be
arings
have
th
e same part
number.
(fig.
41).
(1 )
Slip
holder 41-H-2197-600
(f
ig. 40) over the starter
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mounting studs engaging
it
to
the s
tarter jaw (G).
Secure
with
nuts.
C lamp
the
holder
i
n vise. Re
move cotter pin (S) fr
om
the
threaded
end
of the
starter jaw.
R
emove
the
starter
d
rive
bevel ge
ar
retaining nut
(R).
Remove
the
starter
drive
bevel
gear
(Q)
and
its
shim.
(c) Remove the internal
locking ring from the
starter
jaw
bearing nut (M),
and
with
wrench 41-W-545-15
(fig.
40), unscre
w
the
nut.
Remove the
holder
41-H-21
97-600
(fig. 40)
from
the
adapter.
Remo
ve the six flat-head screws from
the bearing
liner
(F).
Press the
liner out
of
the s
tarter
drive
adapter
with s
tuds
assembly (D
).
(/) Press the
starter
jaw (G), starter jaw ball
bearing
(H),
starter
jaw roller bearing (L), and
the outer and
inner
bearing spacers
(J) and (K)
from
the liner.
Press the starter
jaw oil
seal
(E) from the
liner.
^__ R
P D 155910,
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(2)
Clean all
parts
thoroughly with
dry-clean
ing so
lvent or vo
latile
m
ineral
spirits
.
(6)
Inspect the gear
and starter ja
w
by
magnaflux or
any
other av
ailable
and
suitable
method
. Look for
cracks,
nicks,
and
burrs on the teeth of the
gear and
splined
end
of
the starter jaw.
Examine
the
bearings and replace as
required
for
continu
ed serviceability.
Examine the mounting studs
and the
starter drive
adapter
self-locking
nuts.
Mark any
loose or
dam
aged studs.
Check parts t
o
t
he limits specif ied
in
repair and
re
build standards
(par. 143).
(c)
M inor scratches can be
removed
wit
h croc
us
c
loth
wet
with
dry-cleaning sol
vent
or volatile m
ineral spirits.
Minor burrs on gear teet
h
can
be removed
in
a like
manner. Ho
wever,
signs
of cracked teeth
or
othe
r
defects
are
cause
for
replacement.
Replace
st
uds (par
. 57).
The
starter
jaw
oil se
al cannot be repaired and
any
sign of
failure
is
caus
e for replacement.
(3)
(fig. 41).
Press the starter
jaw
oil
seal (E) in bearing
liner
(F) with the
solid
f
ace
to the starter
side.
( ) Press
the
liner in the drive
adapter with studs assem
bly
(D)
making
certain
the
oil
holes
of
the
liner
and
adapter
are in
aline
ment. Install the
six
flat-head
screws (T
) and
stake
them
in
place.
(
c)
Press the
starter jaw
ball
bearing
(H), the outer and
inner bearing
spacer
s
(J)
and (K), and the
starter
jaw roller bearing (L)
on
th
e starter jaw
(G). Center
the
outer
spacer between
the
bearings
to eliminate
in
terference
when
the
jaw and bearing assembly
is
inserted
into
the
bearing
liner.
Press
the
jaw
assem
bly
into the li
ner and adapter.
I
nstall holder 41-H-2197-600 (fig
. 40 ) on
th
e adapter.
Clamp
the
holder in
a vise.
Install the st
arter jaw
bearing
nut (M ) with w
rench
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J
A
W
7
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41-W-545
-15
fig. 40). In
sert
starter ja
w nut in
ternal lockin g
ring
(N).
(/) Install
the start
er drive
bevel gear shim
(P) and t
he
st
arter drive
bevel gea
r Q)
on the
starter
ja
w.
Install
the
starter drive b
evel
gear retai
ning nut
(R);
tighten and
check
the
dim ension shown in figure
42.
Select sh
ims to obtain
th
is
di
mension.
S E L E C T SHIM
S
TO
OBTA
IN THIS
D
IMENSION WHEN SIDE
C L E A R A N
C E
IN B EA R IN
GS IS T A K E
N U P IN
T HRU S T DIRECT
ION
A S SHO
WN
RA P D
155912
In
stall cott
er
p
in S) i
n
the
be
vel gear
re
taining
nu
t.
Re
m ove
the
assembly
from the hold
er 41
-H-2197-6
00
fig. 40).
fig. 4
3).
1)
Rem
ove
the
cotter pin,
slot
ted
nut, and
plain
washe
r
from
th
e ge
nerator-dri
ve
bevel
an
d spur
gear sha
ft
(K).
Tap
the
shaft
gently
with
a
soft
hammer
and
remov
e
the
shaft and the
g
enerator-dr
ive
bevel and
spur
gea
r
(J).
(5)
Remove safe
ty wire,
slotted
nuts,
and
plain
washer
s
and lift
the
g
enerator-dr
ive
bevel
and
sp
ur
ge
ar brack
-
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A—SEAL, OIL
, ADAPTER
500286
B— STUD
74030
97
C—ADA
PTER, DRIVE,
W/STUDS,
ASS
Y 7346540
D— PL
UG,
P
IPE
7538990
E
—GASKET
, 0 RING
50121 9
P—
GASKET,
0 RING
546884
G—
GEAR, BEVEL, DRI
VEN
734650
3
H—B
RACKET,
B
EVEL
A ND SPUR
GEAR 7403440
J—GEAR, BEVEL
AND SPUR, DRIV
E 7
346546
K
—SHAFT, BEVE
L
AND
SP
UR
GEAR
7346535
L—NUT,
SL
TD 225869
M—WA
SHER, PLAIN
5
02245
N
—WASHER
,
PLAI
N 7372
651
P—NUT, SHEAR, SLTD
7346725
Q_P
IN, COTTER
121222
R—STUD
7403075
S
—WASHER
, PLAIN 5022
04
T—
NUT, PLAIN
22
5854
U—NUT
, JA M
107823
Continued
et (
H) from th
e drive a
dapter with
studs assembl
y
(C).
Lift th
e gen
erator-dri
ve
driven
bevel
gear (G) f
rom
the a
dapter.
Press the
adap
ter
oil seal
(A)
from the
adapter
.
R
emove pip
e plugs (
D) from the
adapter
,
b
racket, and
sh
aft.
(2)
Clean
al
l parts
thoroug
hly in dry-cleanin
g
solven
t or volati
le mineral
spirits. Clean
oil p
assages
by flowing
clean dry
-cleaning
fluid th
rough the
m. If
n
ecessary,
use probe
s to
d
islodge
sludge
depos
its.
(
)
Inspect
gears and sha
ft by ma
gnaflux
or any other
availabl
e method.
Loo
k
for
cracked or
bur
red gear
teeth.
Examine
the
shaft for
scratches or
galling.
I
nspect the ada
pter and
bracket
for casting
defect
s,
cra
cks, and
burrs. Mark
any loose
or d
efective
stu
ds.
Examin
e th
e oil seal. R
eplace it if
there is any
doubt
as to
its
serv
iceability.
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Check
parts to the l
imits
specified
in
repair an
d re
bu
ild sta
ndards (par. 14
4).
Replace
the
studs (par.
57).
Remo
ve
a
ny minor
burrs or scratches wit
h
crocus
cloth
wet
with
dry-cleaning
solvent
or
volatile min
er
al spirits.
Any signs o
f crack
s
are ca
use f
or
part
replacement
.
The
adapter oil
seal canno
t be repaired.
Replace the
seal if it
shows any s
ign
o
f failure.
(3) (fig.
43).
(a-)
I
nstall pipe
plugs
(D) in t
he dri
ve adapter
w
ith studs
ass
embly (C
), the generator
-drive bevel and
spur gear
b
racket (H
),
a
nd
bevel and spur gear s
haft
(
K)
re
sp
ectively.
Install
the drive
adapter oil se
al (A) with
replacer
41-R-2392-9
95 (fig. 7
),
k
eeping the
flat face
of the
seal
on the generato
r sid
e.
(c) Install
driven
bevel
gear
(G)
in
the
adapter
and in
stall
bevel
a
nd spur
ge
ar bracket
(H
)
with
four
p
lain
washers a
nd slotted
nuts. Secure with safety
wire.
Place the
gene
rator-drive
bev
el
a
nd
s
pur
ge
ar
(J) on
the gen
erator-drive
bevel
a
nd spur
ge
ar
shaft
(K)
.
Inse
rt
th
e shaft in the bracket. Insta
ll
plain washer
(N) and the
slotted shea
r nut (P). Tighten
and
secure
with cotter
pin (Q).
Rotate the g
ears and note if they
turn
freely.
Check
gear
backlas
h (par.
1
4 4).
(fig.
4
4).
(1)
Remove
the jam
nuts, plain
nuts,
a
nd plain
wa
shers
fro
m the magne
to
drive
housing cove
r (S) and the
booster coil and
filter bra
cket
a
ssembly
(PP)
(f
ig.
110)
.
Remove
the
brack
et and cover. D
iscard
th e
co
ver
gasket an
d the
"0" ring gasket.
Re
move the
magneto drive
housing ada
pter (G) by
remova
l
of jam nuts, plain
nuts, and plain was
hers
holding the adapter
to
the
magneto drive
housing (Y).
Remove
the adapt
er
usi
ng puller
4
1-P-2906-280
(fig
.
7). Discard the
gasket. Lift
out both magneto
gears
(K).
(c) Remov
e the cotter pin
s, slotted
nuts, and pl
ain wash
ers
from the m
agneto dr
iven idler
bevel
g
ear
adapter
96
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(J). Using puller 41-P-2906-280, lift out
the
adapter.
R e m o v e the magneto driven idler bevel gear
(L)
and
the magneto idler drive bevel gear
(HH) through
the
cover
opening
o f the magneto drive
housing
(Y).
R e m o v e
pipe
plug
(GG)
from the
hous ing .
(2)
(a) Cleaning.
Wash all parts in
dry-cleaning
so lven t or
volati le mineral spirits.
(6)
Examine all
mating surfaces
of the
housing
and
adapter for n i cks and scratches. N o t e if the edges
o f
surfaces are burred
or contain
high
spots
which,
wil l
prevent proper seating
o f
mating parts. Ex
am in e castings for cracks .
Examine
gears
for
abrasions o n
tooth
faces
and
burrs
o n
tooth
corners.
Inspect the
gears
and
shaft
by
magnaf lux . If this
method is
not available,
inspect them with a mag
nifying
glass
for
cracks. Replace all
cracked
parts.
Inspect
the
oil
seals. N o t e
if
the sealing
edge
is worn,
cracked, or
t oo stiff to seal properly.
Replace
the
seals if there is any doubt
o f
their
serviceability.
Examine the governor spark advance assembly
(X)
and
no t e
if
the
pins and
stops are
secure,
if fly
weights operate freely and if springs are cracked
or
broken. If any unit has a defect ive
part,
replace
with a
n e w
assembly.
Examine studs.
Look
for
loose
or
damaged
studs.
Mark any defect ive studs
for
replacement.
Check all parts to the limits
specif ied
in
repair
and
rebuild standards (par. 145) .
Mino r
n icks
and burrs c a n
be
r emoved
from
castings
with
a f ine mil l file. Bad
mating surfaces
are cause
for
replacement.
Replace studs
(par.
57).
Minor
scratches
o n
gears and shafts can be
r emoved
with c r o cus
cloth,
wet with dry-cleaning so lven t or
volati le
mineral spirits.
Replace
any parts hav
ing scratches with raised
meta l .
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A—N
UT, JAM
107822
B—NUT,
PLAIN 225853
C—WASHER,
PLAIN 7744766
D—M
AGNETO, ASSY 7539854
E—GASK
ET,
M
AGNETO 73
46513
F—SEAL,
OIL,
MAGNETO GEAR
500048
G—A
DAPTER,
DRIVE
HOUSI
NG
734653
4
H—GASKET,
DRIVE
ADAPTER
7346502
J—ADAP
TER,
DRIVEN
IDLER
BEVEL GEAR 7
346552
K—GEAR
, MAGNETO 7410
051
L—GE
AR, BEVEL,
DRIVEN IDL
ER
7346521
M—STUD
7403503
N—STUD 7
403073
P—GASKET,
0
RING
50121 9
Q—STUD—7
403071
R—GASKET
, COVER 734661
7
S—
COVER, M
AGNETO DRIV
E HOUSING 7346605
T—WA
SHER, PLAIN 502245
U—S
TUD 7403501
V
—NUT, SLTD 225 86
9
W—C
OUPLING, SPA
RK ADVANCE GOVERNO
R 73 4
6524
X—GOVE
RNOR,
SPARK ADVANCE,
ASSY 7767445
Y—HOUSI
NG, MAGNET
O DRIVE 7346516
Z—STUD
7403068
AA—NU
T, JAM
1
07823
BB—NUT,
PLAIN
225 854
CC—
WASHER, PLAIN
502204
DD—
ADAPTER,
DR
IVEN BEVEL
G
EAR 7346558
EE
—GEAR, BEVEL, DRIV
EN, W/INTE
GRAL SHAFT—
7346538
FF—
GASKET, HOUSING 734
8753
GG—PLUG,
PIPE
7538990
HH
—GEAR, BEV
EL,
IDLER,
D
RIVE 7346520
JJ—PI
N,
C
OTTER 1 2 1 2 2 3
KK
—STUD 7403
071
Conti
nued
(3)
(fig.
44).
(a)
Install
pipe
plug
(GG)
in
the magneto drive housing
(Y
).
(6) Ins
tall the magneto
idler drive bev
el
gear
(HH
)
throu
gh
the cover
op
ening
of the
housing,
(c)
Install the magneto
driven
idler bevel ge
ar (L). In-
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s
tall the magneto driven
idle
r
bevel
gear adapter
(J)
i
n
pla
ce on the
holding
studs
by tapping it gently
with
a soft hammer.
Secure with plain washers
(T)
slotted nuts (V) and cotter pins (JJ
).
Ins
tall
the
two magneto
gears
(K) in
the magneto
drive
housing
(Y).
Install
th
e magneto gea
r oil
seals (F) in the magneto
driv
e housing adapter
(G). Use re
placer 41-R-2392-
995
(fig. 7), with the flat face to the
magneto
sid
e.
(/)
Install
the dr
ive adapter assemb
ly on the
magn
eto
drive
housing, using a
new
drive
adapter
gaske
t (H).
f i r )
Install the magneto drive housing
cover (S), with a
new
cover gasket (R) and 0 ring gasket
(P).
In
stall
the booster
coil
an
d
filter
bracket
assembly
(PP)
(fig. 110).
Secure
cover
and bracket
with plain
wash
ers
(T), plai
n nu
ts
(B), and jam
nuts (A).
(fig.
45).
(1)
(a)
Remov
e the
fuel pump drive ada
pter (AA)
by
taking
off
the
jam
nuts,
plain nuts,
and
plain
washers
hold
ing it to the
camshaft drive housing
(D). Slide
th
e
adapter
from the studs
and
discard 0 ring gaskets
(U) and (V)
.
Li
ft the
fuel pum
p bevel
gear (T) from the adapter.
(c )
Lift the
governor
bevel
gear (S) from the
camshaft
drive
housing
(D).
Lift
out
the fu
el pump
and gov
ern
or
drive be
vel gear (BB).
R emove
two pipe
plugs
(E)
from
the fuel
pump drive
adapter, and thre
e pipe
plu
gs (E) and (DD) from
the
camshaf
t
drive
housing.
(2)
Clean
all parts thoroughly in dry-cl
eaning
solvent
or volatile
mineral spirits. Clean oil
passages
by
flowing
clean dry-cleaning
fluid through them. If
n
ecessary,
use prob
es to dislodge
sludge
deposits.
Passages
must
be
kept
clean.
Look for cr
acks
in the
camshaft
drive housi
ng and
the fuel pum
p
drive
adapter. Use a
strong
light or
the
latest inspection process av
ailable. In
spect
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mating surfa
ces for nicks, scratche
s,
and bur
rs.
Replace
casti
ngs in which
cracks
are
found.
Inspe
ct
gears by magnaflux,
if
ava
ilable, and
exam
ine
for
abrasions and burrs.
Note any scoring
or
galling on bearing
surfaces. Replace
cracked parts.
Check
studs
and
replace
any
loose
or damaged
studs
(par. 57).
Examine the threaded
pipe plug
openings in
the
castings. They must not be
damaged or leaks will
exist
afte
r assembly. Re
pair or
replac
e any plugs
having
damaged
threads.
5 . Check all parts
to
the
limits specif ied
in re
pair
and
rebuild standa
rds (par. 146) .
(3)
Ins
tall two pipe plug
s (E) in the fuel
pump
drive
adapter (AA),
and three pipe pl
ugs
(E) and
(DD)
in
the camshaft
drive
h
ousing (D).
(6) Install
the fuel
pump
and governor
drive bevel gear
(BB)
in the
camshaft
drive housing,
(c)
Install the governor
bevel gear (S) in
the
camshaft
drive housing. Hold it
in
position
from the governor
side,
as
the
fuel pump drive
adapter
(AA)
with the
fuel
pump
bevel
g
ear (T)
is
ass
embled to the
cam
shaft
drive h
ousing. Use new 0 ring gaskets
(U)
and (V). Secure
with plain washers (G),
plain nuts
(H
), and jam
nuts (J).
/. (f
ig. 46).
(1)
Remove
pipe plug
(Q)
from
the control
housing assembly. Remov
e
the
oil
control
valves
(pars.
36/and56/).
(2)
Wa
sh
thor
oughly
w
ith dry-cleaning so
lvent
or
volatile
mineral spirits.
Clean o
il
passages
by
f lowing clean dry-cleaning
fluid
through
them. If nec
essar
y, use
probes
to dislodge sludge
deposits.
Check
for loose or
damaged studs
and marks
defective
ones
for
replacement.
Che
ck
the hou
sing for cr
acks, damaged
gasket
sur
faces,
torn threads in threade
d openings, and wor
n
or
pitted
valve seats. Replace
the
housing if
any
cracks
are
noted.
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t
o
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A — G E A R ,
BEVEL,
DRIVEN,
IDLER, CAMSHAFT DRIVE 7375432
B —P L U G , OIL
TRANSFER,
INNER 7744669
C — G A S K E T , 0 RING 546863
D—HOUSING,
CAMSHAFT DRIVE 7375420
E—PLUG, PIPE 7538990
F—GASKET,
GOVERNOR
7521260
G—WASHER,
PLAIN
502245
H—NUT, PLAIN
225853
J—NUT, JAM 107822
K — G O V E R N O R ,
ENGINE,
HYDRAULIC, A S S Y 7376023
L — S T U D
7403500
M—WASHER,
PLAIN
502204
N—NUT,
PLAIN
225854
P—NUT,
J A M
107823
Q—SHAFT, CAMSHAFT DRIVE 7346568
R—STUD 7403502
S — G E A R ,
BEVEL, G O V E R N O R — 7 3 4 6 5 4 2
T—GEAR,
BEVEL,
FUEL PUMP 7346543
U—GASKET, O
RING 501219
V—GASKET, 0 RING
546871
W — S T U D 7403507
X—GASKET,
FUEL
PUMP
7006868
Y—PUMP, FUEL, ASSY 7410094
Z — S T U D
7403101
AA—ADAPTER, FUEL PUMP
DRIVE
7346591
B B — G E A R , BEVEL,
DRIVE,
FUEL PUMP A N D
GOVERNOR
7346541
C C — S T U D 7403501
DD—PLUG, PIPE 7338670
EE—GASKET,
0
RING
501221
Continued
Replace
studs
(par. 57).
Minor valve seat defects can
be
corrected
by lap
ping.
Replace
valve
housings having
damaged
valve seats.
Mino r
scratches
and
burrs
o n
gasket surfaces
c an
be r emoved with
an oil s tone .
(3)
(a) Install pipe plug (Q) in
the
oil
control housing as
sembly (A).
Assemble the
oil pressure
control valve
assembly
(H),
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A—HOUSING, OIL
CONTROL, ASSY 7375872
B—WASHER, PLAIN
502245
C—NUT, PLAIN
2258
53
D—NUT,
JAM
107822
E—GASKET
,
ANNULA
R 5
02801
F—WASHER,
PL
AIN
502245
G—BOLT,
DLD
-HD
734671
3
H—VALVE, CONTROL,
OIL
PRESSURE,
ASSY
7521774
J—VALVE,
BYPASS, OIL
FI
LTER, A
SSY
75
3 9 4 8 6
K—VALVE, BY-PA
SS, OIL COOLER
,
ASSY
7375859
L—
GASKET, ANNULAR 58380
3
M—G
ASKET, ANNULAR
583802
N—STU
D 7403519
P—GASKE
T,
HOUS
ING 7346578
Q—PLUG, PIPE
7338671
the
oil
filter
bypass
valve
assembly
(J),
and the
oil
cooler bypass valve
assembl
y (K) with new
g
askets.
Install
the valves in the
housing,
only hand-t
ight, to
prevent
dir
t
from
entering
the op
enings
in
th e
h
ousing.
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(1)
R emove safety
wire,
slotted nu
ts,
a
nd
bolts holdin
g
the
starter
driven
bevel gear (G) to
the
pow
er tak
e-
of
f drive gear
(H,
fig.
39).
R emov
e
the s
tarter driv
en
be
vel gear
ball bearing
(D)
and shim (E,
fig. 39) fro
m the d
riven
bev
el
gear.
(c) Remove
ex
ternal snap
ring (Z) from
the
pow
er tak
e-
of
f driv
e
sha
ft ( A A , fig.
38).
(2)
C leaning. Clean
all parts
thor
oughly
with dry
-clean
ing solvent
or
volatile
mineral spirits.
Inspect
the
gears
and shaft b
y
magnaf
lux,
if
av
ail
able.
If
no
t, use a str
ong light and ch
eck the
ge
ars
for cracks,
sharp f
ins,
or burrs at t
ooth
co
rners,
and for
galling or pitting
of tooth
fa
ces.
Replace
all ge
ars
showing
such
defects.
Inspect the shaft for cracks
, galling,
sharp
burrs,
and
nicks
on
splines.
Check
the
spline
for
fit
with
its mating p
art. S
tone-off any
slightly
rough
spots
and polish
with crocus cloth
wet with dr
y-cleaning
solvent
or volatile
mineral spirits. Repla
ce the shaft
if any cr
acks are di
scovered.
Check
the
bu
shing-type bearings in
the pow
er
tak
e-
off
drive
ad
apter
(C C ,
fig.
38) for
loosenes
s
and
ev
idence of
overheating. O
verheating is an in
di
cation
of insufficient
lubrication. Examine
the
oil
passa
ge
in
the adapter to
be s
ure
it i
s clean.
C he
ck bearings to
the limits specified in
repair a
nd
rebuild
standards (par. 1
47). R
eplace loose, dam
aged, or
worn bearin
gs.
4.
Check
the
starter
driven
b
evel gear bal
l
bearin
g
for
freen
ess of ball rotation in race
s. R ep
lace
the
bearing if there
is any doubt
as
to
its continued
serviceability.
Check
parts to the
limits specified in
repair
and
rebuild
standards
(par.
143) .
(3)
(fig.
38).
Install
the externa
l snap ring (Z)
on the
power
take-
of
f drive shaft
(AA).
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Asse
mble
t
he starter
driven
bevel
gear
G) to the
pow
er ta
ke-off drive g
ear (H,
fig. 39).
Secure w
ith
drilled
-hex-head
bolts
F),
slot
ted
nuts J),
and
safety
wire
.
c) Inst
all the
starter driv
en b
evel
g
ear
b
all b
earing (D )
and
shim
E)
into the
starter
driven
bevel
gear
G ,
fig.
39).
Com
bined
thickn
ess
of the shim a
nd bear
ing ou
ter race should
to
tal 0.594
to
0.596
inch.
1)
fig. 113).
Remove
the cotter
pin from
the l
ifting eye
f
illister-
head drilled pin
JJ). R
emove
the
p
lain
washer and
the l
ifting
ey
e spring
GG)
and withdraw
the
pin.
Separate the
accessory
case
lifting
eye
HH) from
the
accesso
ry case brea
ther lin
e adapte
r
KK
).
Remove th
e
b
reather
line conne
ctors (L
L)
from
the
adapte
r.
(2)
Cl
ean all
pa
rts
th
oroughly
with
dry
-clean
in
g so
lvent or vola
tile mineral
spirits.
C
heck t
he spri
ng and replace
it if
there
are
sig
ns of
wea
kness.
Exam
ine
the
breather line connect
or opening
s,
i
n t
he
ad
apter, for
torn or d
amaged
threads. If th
e
threads are
n
ot
servic
eable,
replace
the
ad
apter.
(3)
fig. 1
13). Inst
all the
liftin
g eye fillister-
head d
rilled pin
JJ)
throug
h
t
he accessory
cas
e
lif
ting
ey
e
H
H) and
the acce
ssory case
breather
line
adap
ter
KK)
.
Assemble
the
lifting eye sprin
g G
G)
o n
the
pi
n. Secure
with plain
washer
FF) and
cotter
pin
E
E). Instal
l
the
brea
ther line co
nnectors LL
) i
n
the
ad
apter.
59 Ass
emb l y o f Ac c e s s o r
y
Case Fr om S
ubassemb
lies
Th
e
eng
ine
is
a
precision
product.
Con
sequently,
the
repair
and
rebuild
standards
of
its
components have
been
fixed
at extreme
ly
c
lose li
mits. Great c
are must
be exercise
d in
all p
hases of
the assemb
ly
o
peration to
insure
satisfactor
y engin
e
pe
rformance.
General
rules
for assem
bly follow
:
1) Cleanlin
ess
is essential to
all oper
ations. D
irt and dust,
1
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even in
minute qua
ntities,
are
a
brasive.
Protect
assem
blies from wind-blow
n dust. Be sure that the ports
have
been
cle
aned as specified; be sure they
are kept
clean. Hands
must
be kept
free from an accumulation
of grea
se which collects dus
t
and grit. Dust
y, grimy
clothing
cannot
be
worn
during
assembly
operations.
(2 ) Before
assembly, coat
all
bearings,
shafts, and contact
s
urfaces with the engine oil appropriate
for th
e
air
temperature
range. This
is
to a
ssure adequate lubrica
tion
of
the parts
until
p
ressure lubrication
reach
es
them.
(3) Always use new
gaskets
o
n joints which confine oil.
Annular copper asbestos
gaskets must
never
be reused.
All 0
ring gaskets should be replace
d. Metal-case
d
oil
seals, such as
those
used in
the magneto drive
a
dapter,
the genera
tor drive adapter, or
the starter
drive adapter, normally
are
long
life parts and may be
reused,
if
in goo
d condition.
The
contact
material, either
leather or synthetic, must
be pliable and show no
evi
dence of
burning. Note
also
that
in
this
type of seal,
a thin, feat
heredge
contacts
the
r
otating part.
If
th
is
edge is destroyed
, the seal is
worthless. The
met
al-
cased
carbon
oil
seal of
the
impeller
driven
gear
is
also
normally
a lifelong
pa
rt. However, it
must not cont
ain
nicks or cracks,
must
show no
si
gns
of scorching and
e
xtreme wear, and
should show full contact and good
seating o
r
it
must be replaced
.
(4) Always
use plai
n washers under nuts on
aluminum
sur
faces.
(5) Be especi
ally
careful
to see that
all b
olts are secured with
jam nuts, tab
washers,
safety
wire,
or
cotter
pins as
may be specified. M
any engine failures are
traced to
neglect of
this
simple
precaution.
(1) In
stall
pipe p
lugs (J,
N,
and S, fig. 35)
in
the
accessory
case.
(2)
Install the
fa
n drive gear oil sea
l
(W, fig.
38) with fan
drive gear oil
seal housing (U), flat side to th
e front
(accessory end)
of
the
engine.
Install the internal
snap ring
(D).
(3) Install the power
take-off
drive
gear (H) and the driven
starter
bevel
gear
(G, fi
g. 39 ) as a
n assembly,
inserting
the power take-off drive shaft (A
A, fig. 38) through
the front
of the accessory case.
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(4)
Install
0 ring gasket
(Y, fig. 38)
on the
power
take-
off drive adapter
oil transfer tube,
loca ted o n
the
acces
sory case mounting pad for the
adapter.
Replace
0
ring gasket (BB) o n
the
power take-off drive adapter
(CC). Place the adapter over the power
take-off drive
shaft
(AA),
and
slide
it into
place
in
the
accessory
case
open ing .
Hold
it in place with suitable washers and
bolts
until
the
power
take-off
drive cover is installed
at
comple t i o n
o f e n g i n e
assembly.
(5) Install the generator drive assembly (F,
fig.
47) with
a n e w 0 ring gasket (H) o n the generator drive as
sembly
oil
transfer
tube,
located
o n
the accessory
case
mounting pad
for
the assembly, and
a
n e w 0 ring
gasket
(G) on
the generator
drive
assembly. Secure
with plain
washers
(D), hex-head nuts
(C),
and jam
nuts (B).
(6)
Install the starter
drive
assembly (K, fig. 47) with
n e w 0 ring gasket (J).
S e cu r e with plain washers
(D),
hex-head
nuts (C),
and jam
nuts (B,
fig. 47).
(7) Install the accessory drive idler
gear
(U) and the mag
ne t o drive bevel gear (V, fig. 39) as
an
assembly. Insert
the
accessory
drive
idler
gear
shaft
(Y,
fig.
39).
S e c u r e
with
idler
gear
shaft
pin
bolt (N), plain
washer
(P),
and
lock
washer
(M,
fig. 39).
(8)
Install both
camshaft
drive
idler gears (K),
both c a m
shaft
drive idler driven bevel
gears
(B) containing both
camshaft inner
oil
transfer
plugs
(C),
and both c a m
shaft
drive
idler bevel
gears
(A,
fig. 39).
(9)
Install
internal snap
ring
(TT, fig.
38)
in the main
accessory
drive
bearing liner
o f
the
accessory
case.
(10) Install
the
large outer and inner
race accessory
drive
gear roller bearing (S)
and
the accessory
drive
gear
bearing spacer (R) o n the accessory drive gear (T, fig.
39).
Install the
drive
gear in the
accessory case,
me s h
ing
it
with the power- take-o f f drive gear (H, fig.
39),
the camshaft
drive
idler gears (K), and the accessory
drive idler and
magneto
drive bevel gear
assembly (U)
and
(V,
fig.
39).
Install the
smal l accessory
drive
gear
roller bearing (SS , fig. 38) by
tapping
it gently
with
a
soft hammer. Install
the
accessory drive gear bear
i ng lock
(RR)
and
the
accessory
drive gear bearing
nut
(QQ,
fig. 38), using special wrench 41-W-430-275 (fig.
34). Be nd
the
tangs o f
the
nut into the s lo ts o f the
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nut. Insta
ll the in
ternal snap
ring
Q )
in the acces
sory
drive
gear T, fig. 39
).
11) Install inter
nal
snap
r
ing (N
) in
the fan drive
gear
T, fig .
38).
I
nstall
the in
ternal snap
ring
D) in the
fan d
rive gear
outer
b
earing
liner S, f
ig. 38)
.
Pres
s
th
e
impeller
and
fan dri
ve gears ro
ller bearing
M )
o
n th
e
fan
drive gear
(T) and
inst
all the assemb
ly in
the liner fig
. 38). Insta
ll
the liner
and gear ass
embly
in the
accessory
case by
gently
tap
ping
with a
so
ft
ha
mmer, m
eshing gea
rs with
the accessory
drive idler
gear U, fig.
39). S
ecure
the liner
assembly w
ith six
plain washers
(
F),
slott
ed nuts R
,
fig.
38),
and safe
ty
wir
e. Inser
t t
he
imp
eller
drive shaf
t
Q)
in
the fan
drive
gear
T,
fig.
38).
12)
Press
the
impe
ller an
d
f
an d
rive gears roll
er bear
ing
M ) on
the impel
ler drive
g
ear
(P
,
fig. 38
). In
stall th
e
inte
rnal sn
ap
ri
ng
(N)
,
in the impeller
driv
e gear.
In
sta
ll the
imp
eller
drive
gea
r
and bearin
g ass
embly on
the im
peller
drive
shaft Q ,
fig. 38). Tap
lig
htly to
insert
the impeller
and fan
drive gears
rolle
r
beari
ng
M ) into
th
e
fan
drive .gear
oute
r
bea
ring
liner
S
, fig.
38).
13) Install
the impeller
driven
gear
roller
bearing
snap
ring
(P
P),
the outer
race
o
f
the
im
peller
driven gear
(inner
and
outer race
)
roll
er bearing
(JJ),
and
th
e
im
peller d
riven gear rolle
r bearing
ret
aining
plate
NN,
f
ig. 38
), in th
e
acce
ssory
case. Secure w
ith
plain wash
ers (F),
slotted
nuts R, fig
. 38),
and safety
wire.
14)
Install the
acc
essory c
ase diap
hragm assemb
ly fig.
48),
meshing
the
impe
ller dr
iven gear H
H, fig.
38)
wit
h the im
peller drive g
ear (P), and
t
ap t
he
diaph
ragm
as
sembly on
the dow els.
Secur
e
wit
h six pl
ain wash
ers
(F
), drilled-he
x-head bo
lts
(E), and safet
y wi
re.
15) Install imp
eller d
rive gear
roller bearin
g sn
ap
rin
g
D
, fig. 38)
in its positio
n in the
diaphragm
assem
bly.
Instal
l the impeller
driv
en gear carbon
oil
seal
B). and
im
peller drive
n
gear oi
l seal
housin
g
C) a
s an
ass
embly
fig. 38
) by linin
g up bolt
holes an
d
tap
ping
it
into
p
lace.
16) Install
sup
ercharger
diffuser
Q) w
ith a n
ew
0
ring
gasket
G , fig. 49)
. Secu
re both
the diffuser
an
d
t
he
impeller dri
ven gear oil
seal hou
sing
with six tab w
ash-
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ers
(P) and
h
ex-head bolts
(N). Bend
up
the
tabs
of
th
e was
hers.
(17
) Install the supercharge
r impeller
spacer
(A ,
fig.
38)
and impe
ller
shim
(M , f
ig. 49).
The
n
install
the
su
per
charger
impeller on the shaft
end of
the impeller driven
gea
r
(H
H,
fig.
38),
using wrench
41-W
-1536-240 (fig.
32).
Check
clearance between
the
supercharger
im
peller
and diffus
er (fi
g.
50).
A
cleara
nce o
f
0.0
30
to
0.035
inch must be obtai
ned by the selection
of shim
s.
(18)
Install
plain
wa
sher (R)
a
nd slotted impell
er
locking
nut
(K,
fig.
49) on the sh
aft end of
the
impeller
driven
ge
ar (HH, f
ig.
38),
using wrench
41-W-1
536-235 (fig.
51). Tighte
n
to
700 Ib-in to
rque.
If
the
lock slots
in
th
e
nut
do
not line
up with the lock
slots in the
im
peller
driven gear,
it
will
be
necessary
to
lap
the seating
surface of
the nut until t
he slots do line
up at 700 Ib
-in
torque. T
he
im
peller
nut lock (J, fig. 49)
must not be
forced into
the
lock slots
in
th
e driven gea
r.
In
stall
lo c
k
and
the impelle
r nut
loc
king ring (H, fig.
49). Turn
t
he ac
cessory
case
gear
train
by hand to m
ake
sure
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R
A
P
D
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A—NU
T, JAM 107823
B — N U T
, PLAI
N
2258
54
C—WASHER,
PLAIN 502204
D — E L B O
W ,
CAR
BURETOR 7376
251
E—GAS
KET, 0
RING 546830
F—HOUSING,
SUPERCHARGER
7375415
G— G A S K E T
,
0
RING 7374220
H—RIN
G, L O C K I N G ,
IMPEL
LER
NUT 7338666
J— L O C K ,
IMPELL
ER
NUT
7410169
K—NU
T, L O C K I N G ,
IMP
ELLER
7410168
L—IMPELLER
, SU
PERCHARGER 7065830
M — S HIM,
IMPELLER
740
3336
N — B O
LT , HEX-HD
501813
P—WASHER,
T A B
7338675
Q—
DIFFUSER, SUP
ERCHARGER 7065829
R—WAS
HER,
PLAIN 7372659
S—WASHER
, PLAIN 502245
T—N
UT, P
LAIN
225853
U—NUT, JAM
107822
Co
ntinued
there
is
no bindi
ng.
C h ec
k
b
acklash of
bevel
g
ears
(
pars.
141
and
142) .
(1 9
) Install
left (2-4-6)
side c
amshaft drive ho
using Z,
fig.
53 ), usi
ng a new 0 ri
ng gasket (AA
), by posi
tioning
the camsha
ft-drive idler
driven bevel
gear
(C
C )
in
the
housing
. Secure with plain
washer (Y), pla
in
nut
(X), and jam
nut
(W,
fig.
53).
(2 0)
Install
right
(1-3-5)
side
camshaft
drive housing
D ,
f
ig. 54), using
a
new 0
ring gaske
t
(A C
)
on
th
e
oil
tr
ansfer tube
and
a new 0 ring
gasket (C )
on
the
ho
using,
b
y position
ing the camshaft-drive
idler driven
bevel
gear (A )
inthe housing.
Secure w
ith
plain
wash
er (Z
Z), plain nut
(YY), and jam n
ut
(XX).
Turn th
e
m
ain drive
gear by hand to see
that
all
gears
of
the
gear
tra
in
tu
rn
fre
ely.
(21 )
Install the
magneto
driven
bevel
gear with integral
sha
ft (EE, fig.
44 and W,
fig. 39),
meshing
it with the
mag
neto drive
bevel gear
(V
, fig. 39
) in the acces
sory
case.
Install the magneto
driven
bevel gear
ad
apter
(DD, fig.
44), keeping
the larg
e
oi
l drain slot
at the
bottom.
Tap gently
with a soft hammer
to get it into
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7 6583
position o n the studs. S e cu r e
with plain washer
(T),
slotted nut (V,
fig.
44), and safety wire.
(22)
Sl ide
spark
advance
governor
assembly
(X)
and
spark
advance
governor coup l i ng
(W ,
fig.
44) o n
the mag n e t o
driven bevel
gear as an
assembly. Mesh
the
coupl ing
o n
the spark advance governor
drive
pins.
Install
0
ring
gasket (P)
o n
the magneto
drive housing
oil trans
fer
tube, and install the magneto drive housing assem
bly over the
shaft
end o f the magneto driven bevel gear
and
studs
of the accesso ry case.
Mesh the internal
splines
o f
the
magneto
drive
idler
bevel
gear
(HH)
with the external spl ines
o f
the spark advance gov
ernor coupling
(W ,
fig. 44). S e cu r e with plain washer
(CC), plain
nut
(BB), and
jam nut
(AA). Turn the
gear train and check for freeness.
(23) Install the
supercharger
housing (F, fig. 49), us ing
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ne
w "0" ring
gasket (G),
and secure
it with plain
w
asher (S), p
lain nut (T),
and
jam n
ut
(U).
(
24) Install accesso
ry case brea
ther
adapter with
lifting
eye
assembly
(G,
fig. 35), using a
new gasket.
Secu
re
wi
th slotted nuts
and safety wir
e.
(25)
Install the
oil
control housi
ng
assembly
(B,
fig.
35 )
with a
new housi
ng
gasket
(P,
fig. 46). Secure with
nine
plain washe
rs,
four
plain nu
ts,
and
jam nuts,
five
drilled-head
bo
lts, and safety
wire. Usin
g sp
ecial
wrenc
h
41-W-3
727-33
(fig.
1
5), tigh
ten the control
housing valves
and secure with s
afety wire
.
(
26) Install the
oil
low
pressure
w
arning
light
send
ing
switch,
the
high temperature
warning
light
sending
switch, and
the
oil
high
pressure
gage
sending
unit
(VE,
V H
,
and
M,
f
ig.
35),
respectivel
y, with pipe
elbows (F)
and (K) a
nd
pipe
bushing (L
)
i
n the pos
itions indicate
d
in figure
35
. Use
wre
nch 70
83852 (fig. 7).
(
27) Install the oil fi
lter
assem
bly (par.
127).
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Se
c t i o n V
.
R E B
U I L D O F
C
MSH
FTS
A
ND D
R IV E S
60.
Disa
ssem
b ly o f Ca
m sha
f ts and
Dr
ives
Kemo
ve
v
alve r
ocker
cove
rs (
par. 4
5). Rem
ove
cam
shaft
driv
e
shaft
s,
ca
mshaf
ts,
cams
haft g
ear hous
ing, an
d
inter-c
ylin
der co
nnect
ors
from
th
e eng
ine
(pa
r. 47).
Rem
ove ca
msha
ft
drive
housi
ngs
fro
m
the
acc
essory
case
(
par.
5
6).
Remo
ve the
inte
r-cyli
nder conn
ectors
U
, fig. 5
3) a
nd N,
fig. 54
) from
the
cams
haft
and
disca
rd
th
e
0
ring
gas
kets.
Loosen
the
dr
ive s
haft
housi
ng
nuts
D
D,
fig .
53) and
W W
, fig.
54) and
remo
ve th
e driv
e sh
aft housin
g
(EE
,
fig.
53)
and
VV,
fig.
54)
.
D
iscar
d th
e 0
ri
ng gaske
ts
V,
fi
g. 5
3) and
G, fig
.
54
).
Re
move
the ja
m
nuts, plain
nu
ts,
and
washe
rs holdi
ng
the
d
rive
sha
ft su
pport
(FF
, fi
g . 53)
and U
U, fig
. 54) to
t
he cam
sha
ft g
ear housi
ng N,
fig .
53) a
nd (P,
fig.
54). R
emove
th
e
suppo
rt.
Rem
ove the
camsh
aft drive
beve
l
gear (HH
, fig.
53)
an
d SS, fi
g .
54) and
disca
rd the
0
ring g
askets
. Rem
ove
the
ca
mshaf
t
ass
embly
from
the
cam
shaft
ge
ar
ho
using.
RAPD
15592
2
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Place
the
camshaft assembly in
a vise, using soft-jawed
protectors.
R
emove
the
locking
wire and
bo
lts and
lift off the
accessory end
oil-
retaining cover
(B,
fig .
53) and
(Y,
fig. 54)
a
nd the
cam
shaft
bevel gear (C,
fig.
53)
and (X, fig.
54).
61
Clean ing
I ns p ec t i o n
and
R e p a i r o f C a m s h a f t s
and
Dr i ves
Clean
all
p
arts tho
roughly
with d
ry-cleaning
solven
t
or
volatile
mineral
spi
rits.
(1) Inspe
ct
c
astings, studs, gears, splines,
shaft, and
oil
passages
(par.
57).
(
2 )
Check
the camshafts
by
magnaflux.
If this equipment
is
not
available, examine
them
with
a
magnifying
glass
for cra
cks. Replace
cracked shafts. Examine t
he cam
sh
aft
lobes for scuffing
and
scoring.
Light
s
cuffing and
scoring can
be cleaned up with a hard
oil stone
and
polis
hed
with
crocus cloth. C
lean
raised
metal
from
any
small
nicks and
abrasio
ns
elsewhere
on the shaft
w
ith a
hard oil stone
and
crocus
cloth. Check
dimensions
to
the limits
spec
ified in
repair and rebuild
sta
ndards
(pars.
149
and
150). Severely
scuffed
or
scored
shafts
must be replaced.
(3) Check
outer and
inner oil-t
ransfer plugs
(L and BB,
fig.
53) and inner
and
outer oil-transfer plug
s (B, and
R, fig. 54). Ade
quate oil
supply to
camshafts and cy
lin
der heads depends on
the
fi
t and condition
of these
plugs. See that
oil
pass
ages are clean. Check the plugs
to
the
limits specified in
repair and re
build
standards
(pars.
149
and
150) .
62 A s s e m b l y o f C a m s h a f t s an
d Dr i ves
Camshafts
and gear
housing
s are right
and
left.
The righ
t
(1-3-5)
side camshaft is
shorter
than th
e left (2-4-6) side be
cause
of the staggered
pos
ition o
f
the cylinders.
Attach the camshaft
bevel
gear (C,
fig. 53) and (X , fig. 54),
and the
accessory
end oil
-retaining cover
(B,
fig. 53) and (Y,
fig.
54)
to
the
camshaft with
drilled-head
bolts. Secure
with
locking
wire.
Refer
to
paragraph 109a
for
tac
hometer
transmit
ter drive
shaft (Z,
fig.
54)
installation.
c.
Install
a
new 0
ring
gasket
on
the
cams
haft gear hous
ing
(N,
f
ig.
53) and
(P, fig.
54). Slide
the
c
amshaft into
the
housing
to
seat camshaft journals in
their bearings. Be
careful not
to
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A—BOLT, DLD-HD
7744685
B—COVER, OIL-RETAINING
ACCESSORY END
7346702
C—GEAR,
BEVEL,
CAMSHAFT
7744898
D—CAMSHAFT
7346598
E—NUT, JAM
107822
F—NUT,
PLAIN
225853
G—WASHER, PLAIN
502245
H—COVER, GEAR HOUSING 7348539
J—GASKET,
COVER 7348540
K—RING,
SNAP
7725554
L—PLUG, OIL-TRANSFER, OUTER 7744853
M—SHAFT, CAMSHAFT
DRIVE 7346568
N—HOUSING,
CAMSHAFT
GEAR 7376029
P—BOLT,
HEX-HD 7744682
Q—WASHER, TAB
7744681
R—GASKET,
0 RING 7539862
S—GASKET, COVER PLATE 7744889
T—PLATE, COVERING, ROCKER BO X 7346604
U—CONNECTOR, INTER-CYLINDER 7744693
V—GASKET,
0
RING 501463
W—NUT, JAM 107823
X—NUT, PLAIN 225854
Y—WASHER,
PLAIN
502204
Z—HOUSING, CAMSHAFT
DRIVE 7375422
AA—GASKET,
0
RING 546863
BB—PLUG, OIL-TRANSFER, INNER
7744669
CC—GEAR,
BEVEL, DRIVEN, IDLER, CAMSHAFT DRIVE 7375432
DD—NUT,
DRIVE
SHAFT
HOUSING 7744897
EE—HOUSING,
DRIVE
SHAFT
7346640
FF—SUPPORT,
DRIVE
SHAFT 7744673
GG—GASKET,
0
RING 546864
HH—GEAR,
BEVEL, DRIVE, CAMSHAFT 7744888
JJ—ELBOW,
HOSE, MALE
PIPE END 7346711
KK—STUD
7403501
LL—STUD 7403501
Continued
n i ck or damage camshaft lobes or journal bearings during this
opera t ion .
Install a
n e w 0 ring
gasket
o n the camshaft
drive
shaft
support (FF,
fig.
53)
and (UU, fig.
54). Insert the camshaft
drive
bevel
gear (HH,
fig.
53)
and
( SS ,
fig.
54)
in
its support
and
install the support o n
the camshaft gear
hous ing .
Secu re
with plain washers, plain nuts, and jam nuts.
Install
n e w 0
ring gaskets
(R, fig. 53)
and
(H, fig. 54) o n
the inter-cylinder c o nne c t o r s
(U,
fig.
53)
and (N , fig. 54). Sl ip
the
c o nne c t o r s over the camshafts.
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A—GEA
R,
BEVEL, DRIVEN, IDLER, CAMSHAF
T DRIVE 7375432
B—PLUG,
OIL-TRANSFER,
INN
ER 7744669
C—GASKET,
0
RING
546863
D—HOUSIN
G, CAMS
HAFT
DRIVE 73
75420
E—PLU
G, PIPE 7538990
P—GASKET, MOUNTING
,
GOVERNO
R 7521260
G—GASKET,
0
RING
501463
H—
GASKET, 0 RING
7539862
J—BOLT, HEX-HD
7744682
K—WASHER, TAB
7744681
L—PLAT
E,
COVERING,
ROCKER B O X 7744692
M—GASKET,
COVERING PLATE 7
744889
N—CONNECTOR IN
TER-CYLINDER 77446
93
P—HOUSI
NG, CAMSHAFT GEAR
7346589
Q—SHAFT
, CAMSHAFT DRIVE 734 6 5 6 8
R—PLUG,
OIL-TR
ANSFER, OUTER
774
4853
S— RIN G ,
SNAP
7 7 2 5 5 54
T—GA
SKET, GEAR HOUSING COVER
7346596
U—COVER, GEAR HOUSING
7346588
V—
WASHER, PLAIN 502245
W — B O L T , DLD-HD 7346710
X
—GEAR, BEVEL,
CAMSHAFT 7744898
Y—COVER,
OIL-RETAINING, ACCESSORY
END 7346702
Z—SHAFT,
DRIVE, TACHOMETER TRANSM
ITTER 7346602
AA—GAS
KET,
AD
APTER 7346634
BB—ADAPER, TAC
HOMETER TRANSM
ITTER
DRIVE
7346600
CC— STUD
7403212
DD—SEA
L,
OIL
500241
EE—GASK
ET, TACHOMETER 77
67519
FF—TRANSMITTER
TACHOMETER, ASSY
7346701
GG—NUT, JAM 107821
H
H—NUT, PLAIN 225851
J
J—WASHER, PLAIN 5022
66
KK—NUT, JAM 107822
LL—NUT,
PLAIN
225853
M M — B O LT, DLD-HEX-HEAD
7744685
NN—CA
MSHAFT 7346659
PP—ELBOW,
HOSE,
MALE
PIPE END 7346711
Q
Q—STUD 7403501
RR—STUD 7403501
S
S—GEAR, BEVEL,
CAMSHAFT DRIVE
7744888
TT—GASK
ET,
O
RING
546864
UU—SUPPORT, DRIVE
SHAFT 7744673
VV—HOUSING, DRIV
E SHAFT 7
346639
WW—NUT,
DRIVE
SHAFT
HOUSING 7744897
XX—NUT, JAM
107823
YY—NUT, PLAIN
2 2 5854
ZZ—WASHER, PLAIN 5022
04
AB—
PLUG,
PIPE
73386
70
AC—GASKET, 0 RING
501221
Continued
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/.
After
camshaft
drive housing
is installed to the
accessory
ease (par. 59), install the camshaft drive shaft
housing
to the
camshaft
drive hous ing .
Install
the camshaft, camshaft gear
hous ing , and inter-cylinder connectors
to the
eng in e as an
as sem
bly (par. 108).
The
camshaft
drive
shaft
and
the
gear
housing
cover
should
not
be
installed
until engine timing
is done
(par. 109).
Install valve rocker covers (par. 110). Install tachometer trans
mitter
assembly (par. 128).
Sect ion VI. REBUILD O F
CYLINDERS
63.
Disasse mb l y
o f C y l i nd e rs
R e m o v e spark plugs. Clean, inspect, and recondition as
s h o w n in pertinent operator's
manual.
The intermediate cylinder
valve rocker
cover (V) was
re
moved at
eng in e
disassembly (par.
45).
R e m o v e
camshaft
bear
i ng cap (R) and valve rocker
shaft
bracket (U). Note iden t i f i
cation numbers o n caps
and
brackets
(par. 47c) .
P lace
valve
spring
compressor
7083692
(fig.
59)
o n
the
cylinder
head.
Attach it
in position over
the exhaust valve with
bolts from the bearing cap and rocket
shaft bracket
or other
suitable bolts. S c r e w in the spring depressor until the exhaust
valve spring retainer (BB)
exposes
the
spring
retainer
lock
(Q).
Tap compressor lightly with
a
soft hammer if the lock tends to
stick in the
valve
s t em groove.
R e m o v e
the locks. Release
c o m
pressor
carefully
and
r emove
the
spring
retainer, the three valve
springs, the exhaust valve rotator (FF) and the exhaust valve
(RR). Position spring compressor o n the intake valve and re
move as outlined above.
Rep lace the bearing cap
and
valve
rocket
shaft
bracket
in
their
original position
so
they
are
not
damaged
or
los t .
64. Cleaning
Inspec t ion
and
Repai r
(1) Clean
all
parts
thoroughly with
dry-c lean ing
so lven t
or volati le
mineral
spirits.
(2) R e m o v e heavy
carbon
deposi ts
from the c om bu s t i o n chamber with a conven t iona l
scraper
or any blunt
too l
which wil l
not
nick or scratch
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the
surface. It
is nec
essary to r
emove only
h
eavy de
pos
its. Su
rfaces
do
no
t ha
ve to be cleaned
to
a
mirror
finish.
(1)
Chec
k the
oil passages
in
the bearing
cap,
ro
cker
s
haft, a
nd
va
lve rocker
s
(fig. 60). Make
certain
they a
re
c
lean and op
en. Small
drilled hole
s
in
th
e roc
kers supply
o
il to the
valve ro
cker rollers
(fig
.
81)
. A sm
all dri
lled hole in the
b
earing
cap
supplies
oil t
o exhau
st
valve.
(2)
Chec
k
th
e surf
ace
o
f the
cylin
der
bore for
dee
p
sc
ratches, scori
ng, or
pick-up
.
E
xamine
the joint
betw
een the
cylind
er head
and cylinde
r b
arrel f
or
signs
of
pitting
or
erosion.
Examin
e the cylinder
head
for
cracks or
erosion
around the
valve se
at inse
rts and valve
guides.
Replace
the cylinder
s if
defective
.
(3)
Che
ck bor
e
dimen
sions to
t
he limits sp
ecified
in re
pa
ir and
rebuild
standards (p
ar. 151)
. If the cylin
der is to be
reused
with
a new
set
of
rings,
the cy
lin
der bore
sh
ould be
rou
ghened by
hand
with a fine
abrasiv
e c
loth
or
sto
ne. If the
cylinder has
been
re-
honed,
roughin
g
is not
necessary
.
A
fter roughing
the bore with
abrasiv
e
cloth,
wash t
he
c
ylinders
thoroughly to remove
abrasive.
At roo
m
temperatu
re, cylinder
bores ar
e tapered
slight
ly so the
y w ill
be essentially
straight
at
engine
operat
ing temp
erature.
With
the cylinder
a
t
r
oom tem
perature,
tak
e tw o
measu
rements of
bo
re diame
ters at to
p
of ring
travel:
one
mea
surement
approxim
ately para
llel to th
e
li
ne
of
val
ves,
t
he other
a
t
90° to
the
first measurem
ent.
Nex
t, check
the
bore dia
meter
at
the flan
ge end of
th
e
c
ylinder
app
roximatel
y
p
arallel to t
he line of
valves,
at
the poin
t
of
deepest
ring we
ar. Make
a
second m
easureme
nt at 90
° to the
line
of valves,
to
the
poi
nt
of d
eepest
ring
wear.
(4)
Check the cylinde
r
bore
taper
by
comparing
t
he aver
age m
easuremen
ts of (c)
and above
. If
t
he hea
d
en
d aver
age is great
er than
the
flang
e
en
d, rehon
e the
cylinder.
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(& )
Compare the two measurements
taken
at the
head
end.
If the difference
show
s
out-of-r
ound
more than
0.003
inc
h, rehone
the
cylinder. If diameter
at the
head end
is
more
than 5 .
7537 inches
after
honing,
replace th
e cylinder.
5)
Check for r
ing
ridge
by carefully
running
a
finge
r over the cylinder wall.
If a ridge
can be
felt
at the end
of ri
ng
travel,
either at the
top or bottom
of
cylinder, it should
be rehon
ed.
6) In
spect valve guides
for loose
ness, cracks,
galling
,
erosion,
or
scu
ffing. Rem
ove any
ca
rbon de
posit
in the val
ve guide bores wit
h crocus
cloth and
dry-cleanin
g solven
t
o
r volat
ile
mineral
spirits.
Check
bores
to the
li
mits specified
in repair and rebuild
stand
ards
(pa
r. 151). Replace
i
f necessary (fig
s.
56 an
d 57)
(c belo
w).
7)
It i
s
very
importa
nt that valve (seat
) inserts are seated
tightly
in
cylinder head.
Inspect caref
ully for any
signs o f
loosen
i
ng. Loose
inserts must be
removed
an
d new ones
installed
(c(4))
below
.
If
ins
erts
are
not
to be replaced
,
inspect
the seat
s.
Grin
d
(f ig.
55)
(par. 151)
if
an
y
sign
of pitting
or
burning is
fou
nd.
Test
the v
alve seat on th
e insert
for
imperfe
ct se
al.
Blue the
face of valve
(seat
) insert
with prussian
blue
. Install a perf
ect valve, and
rotate it o
ne-half
turn
on
the
(seat)
i
nsert. If valve
does n
ot show
perfect contract,
regrind
the seat on
the ins
ert.
(8)
Chec
k valves
f
or
eviden
ce of
imperfect
seat
ing.
Heavy
discoloratio
n,
burnin
g, eros
ion, or
a
carbon
deposi
t
on the
valve face
is
an
indication
of a warped valv
e.
Light
frosting or disco
loration of the shiny
valve fa
ce
should not
be cause for
replace
ment if
the valve oth
er
wise app
ears
to
be in
g
ood condition
.
Th
ese
minor
discolorations usually
appear
as
the
valves
begin
to
cool
aft
er the
engine is stopped
. Valves seat
much
better at operati
ng temperatures
than inspect
ion of
a
cold
valve indicates. Exa
mine
valve stems and
l
ocking grooves
for
we
ar,
scoring, pittin
g, or other
damage.
Make
certain that
tips
ar
e not cra
cked or
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damaged.
Check stem diameters
to
the
limits speci
fied
in
repair
and
rebui
ld standards (par. 151).
Inspect
valve springs for cracks, flaws,
or
other
visi
ble evidenceof
failure.
Check all
springs
for
com
pression
to
the
limits specified
in repair and rebuild
standards
(par. 1
51).
(c) Check
valve
spring
retainers and spring seats for
w
ear
or signs of
fa
ilure. Che
ck the
ret
ainer
lo
ck.
This lock is in halves
and
we
ar
may
be
noted by
ridges
left
on the retainer
between the halves.
Re
place allworn parts.
(9) Use a
fine
mill
file
to
remove raised
metal from light
scores
or scrat
ches in the camshaft
bearings.
Check
bearings
to
the limits
specified
in
re
pair
and rebuild
standards
(par. 151).
(10) Inspect the helicoil inserts
for air de
flecto
r mounting bolts
in
N
os.
1,
2
, 3, 5,
and
6 cylinders
for signs of looseness and
galled or pulled
thre
ads. R e
place a
ny defective
inserts.
(1)
Carefully
straighten
be
nt fins on
the
barrel
as
close
as
possible
to
the original
spacing.
These fins are sof
t
and
should
not
be
destroyed.
R
e
p
lace
cylinder
if loss of total fin area is
more than
1 percent.
(2)
Replace cylinders with
broken head
fins if
defect is more than
half
the fin
depth or more
tha
n
two inches long. A cylinder
can
be
us
ed
if it has not
more than three a
cceptable defects. No two defects
can
be on
adjacent
fins.
Defective
areas
shall
be
smoothly
blended to eliminate
sharp
corners.
The
depth
of
an
y
blended fin must not
be
less than 50
perc
ent of its
original
depth.
(3)
To remove a valve guide,
insert valve guide remover
41-R-2371-35 (for
intake valve guides)
or
valve
guide rem
over
41-R-2371-
20 (for exhaust valve
guides)
into the
guide
(f ig.
56).
Support the
cylinder
so that fins
will
not be
damaged. Drive the guide
out
of
the
cylind
er
he
ad.
Valve guide replacers
41-R-2390-482 (for intake
v
alve guides and 41-R-2
390-475
(for
exhaust valve
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REMOVERS
guides)
(fig.
57) are
p
rovided f
or
installing replace
ment guides.
To
ins
tall a
valve
guide, pull
the
loose
ferrule from
end of the
replacer. Place valve guide
over tool, entering
the
shor
t
end
of the guide into
the hollow
tool handle. Replace the fe
rrule
to retain
the
gu
ide.
E
nter the
ferrule in the bore for the
valve
guide
and drive
the
guide to
its
seat.
Withdraw
the
replacer.
Replace
the loose ferrule
on
th
e
tool,
(c) Roug
hing
an
d finishing valv
e guide reamers
and
reamer
pilot bu
shings are
provided
for conditioning
replac
ed guides.
(fig
. 57). For
exhaust valve
guides use
pilot bushing 41-B-2181-150 (fig.
7),
roughing
ream
er
41-R-2254-570, and
finishing
reamer
41-R-2254-520
(fig.
6).
For
intake
valve guides use
pilot
bushing 41-B-
2181-175 (fig. 7), roughing
reamer 41-R-2254-552, and finishin
g reamer 41-
R-2254-50
5 (fig.
6).
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REP
L A
CE
RS
1-
R-2
39
0-4
75
R
P D
15
59
27
T
o
r
ea
m
va
lv
e
gu
id
es
,
in
s
er
t
t
he
p
il
ot
b
us
hi
ng
i
n
th
e
va
lv
e
(
se
at
)
in
s
er
t.
W
h
ile
an
as
si
st
an
t h
ol
ds
th
e
b
u
sh
in
g
in
pl
ac
e,
r
ou
g
h a
nd
f
in
ish
r
ea
m
th
e
g
u
id
e.
1
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(4)
R e m o v e r
kit
41-R-2371-465
(figs.
8
and
58) is
used
to
r emove and replace valve
(seat)
inserts. The kit
is a drawbar
col let set , modif ied
to permit the use o f
C02
(carbon
dioxide)
gas
which ,
up o n
expans ion ,
gives
the
col le t
an extremely l ow
temperature.
T w o
col le ts are provided,
one for
the intake
and
one for
exhaust valve (seat)
insert.
(6)
To r emove a valve (seat)
insert,
place the
proper
size
col let o n the
col le t
arbor.
S c r e w the
cone expander into
the arbor.
C o nne c t
the hose furnished with the
kit
to
a C0 2 cylinder. Arrange
it so
the quick
detach
able
f i t t ing,
may
be
attached
to
the
extension
tube
o f
the
col le t
without
delay.
Heat the
cylinder,
in
a fur
nace,
to be tw e e n
450° and 500° F.
If a furnace is
not available, the
insert
part o f the cylinder may be
heated with a
b l ow
torch. W h e n the cylinder is heated
immediately
insert
the
col let assembly into
the
valve
(seat)
insert from the open
end
o f
cylinder.
Seat
the
col let and expand it to the limit by
the
hand-
wheel .
Attach the
hose
fitting
to the
tube extending
from the cylinder head. Open C0 2 valve for 10 to
15 seconds
to
shrink
the insert. Strike
the extension
on
the
gas fitting
with
a
hammer to
dis lodge
the in
sert. Detach the gas
fitting.
Withdraw the insert
whi le still
on
the collet . Figure
58
s h o ws the
arrange
ment
for removal .
Allow
the cylinder
to
air
c o o l .
D o
not
c o o l
with water.
(c)
To
replace
a
valve
(seat) insert,
heat
the
cylinder
to
450° to 500°
F.
Place the
insert
on the
collet,
and
turn
the handwhee l to hold the
insert
in place. Attach
the C0 2 fitting
and chill
the insert.
Detach
the gas
fitting,
insert
the
col let
assembly, and seat the
insert
securely.
Release
the col le t and r emove the
fixture
after the
cylinder temperature
has
approached normal
by air coo l ing .
Caution
Asbes tos
gloves
always
should
be
worn
whi le
replacing
inserts. Severe burns can result from
heated cylinders and
from the
l o w temperature o f
the tool .
Oversize
valve (seat) inserts (0.010 and
0.020
in)
are supplied as replacements for l oose inserts.
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e
)
B
e
fo
re
re
fa
c
in
g v
alv
e
se
a
ts,
b
e ce
rt
ai
n
th
a
t
g
ri
nd
i
ng
s
to
ne
s
a
re
tr
ue
to
a
45
°
an
gl
e.
U
s
in
g
a
va
lv
e
s
ea
t
g
ri
nd
in
g
to
o
l,
d
re
ss
t
he
s
ea
ts
.
C
he
ck
va
lv
e
c
o
nt
ac
t
(b
(7
) a
b
ov
e
).
W
he
n
pe
rf
ec
t
c
o
nt
ac
t
is o
b
ta
in
ed
,
na
r
ro
w
th
e
se
a
t w
id
th
b
y
gr
in
d
in
g
t
he
su
r
fa
ce
s
an
d
i
nn
e
r
walls .
Keep
the
seat
as
near
as possible
to
the center
o
f
t
he
v
al
ve
f
ac
e
.
C
h
ec
k
v
al
ve
c
o
nt
ac
t
a
g
ai
n a
ft
er
se
a
t
w
id
th
i
s
ob
ta
in
ed
.
(5
)
A
h
e
lic
oi
l
i
ns
e
rt
is
a
s
te
el
sp
ir
al
c
oi
l
w
it
h
a
th
r
ea
d-
sh
a
pe
d
f
or
m
g
ro
un
d
o
n
th
e
in
si
de
a
n
d
o
ut
sid
e
o
f
t
he
c
oi
ls.
A
ta
n
g
at
on
e
e
nd
of
th
e
c
oi
l is
u
se
d
in
t
h
re
ad
in
g
th
e
in
se
rt
in
to
a
t
h
re
ad
ed
ca
s
tin
g
.
A
se
rr
at
ed
to
o
th
se
ct
io
n
a
t
th
e
o
t
he
r en
d
o
f
th
e
coil
s
er
ve
s
to
stake the
insert
in
place
in
the casting.
U
s
in
g
a
di
am
o
n
d-
po
in
te
d
pu
n
ch
,
d
riv
e
th
e s
er
ra
te
d
st
ak
in
g
t
oo
t
h s
ec
ti
on
o
f t
he
in
se
rt
o
u
t
of
t
h
e t
hr
ea
d
in
to
w
h
ic
h
it
is
i
m
be
dd
e
d.
In
se
r
t
th
e
h
el
ico
il
ex
tr
a
ct
in
g
t
oo
l
4
1
-T
-3
0
92
-3
5
0
(f
ig
.
7)
i
nt
o
th
e
i
ns
e
rt.
Ke
e
pi
ng
a
co
n
st
an
t p
re
s
su
re
on
th
e
t
oo
l,
tu
rn
c
ou
nt
er
cl
oc
k
w
ise
u
n
til
t
he
in
se
rt
is
r
em
o
v
ed
.
1
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Thread insert into
the threaded guide
o f inserting too l 7751060 (fig. 7) by
s lowly
turning
pilot
until
the insert is
f lush with the end o f the
tool .
Place
pilot
o f
the
inserting
too l
in
the threaded hole
in
the cylinder
casting,
the
face
o f the t oo l
resting
solidly
against
the
casting.
S lowly
turn
the pilot
c lockwise ,
causing
the
insert
to
enter the threaded
casting,
until
n o mor e
resistance is
felt. R e m o v e
in
serting tool .
Stake insert in
place.
65. A s s e m b l y o f Cy l i nde rs
(fig. 60)
Install exhaust
valve
spring
compressor
7083692
(fig.
59)
o n
the
cylinder head. S e cu r e it
in
pos i t ion
with
bol t s
from the
camshaft
bearing
cap
(R)
and rocker shaft
bracket
(U) or
other
suitable
bolts.
Insert
the exhaust
valve
(RR)
in
its guide. As
semble
the exhaust
valve
rotator
(FF), three
valve springs, and
exhaust valve
spring
retainer
(BB).
Compre s s
the
spring a s s em
bly
suff ic ient ly
to
permit
installation o f spring retainer locks
(Q )
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A—GASKET,
0
RING 170148
B—VALVE, I
NTAKE 7346482
C—INSERT (SEAT), INTAKE VALV
E 7744608
D—CYLINDER, ASS
Y 7346610
E—NUT,
HEX
7767432
F—NUT, JAM
107381
G—BAF
FLE, INTER-CYLINDER
7376014
H—BOLT,
HEX-HD 7744736
J—WASHER, L OCK
121621
K—STUD
7403071
L—
NOZZLE, PRIM
ING 7410158
M —
GUIDE, INTAKE VALVE
7346483
N—
SEAT,
I
NTAKE VALVE SPRING 77446
17
P—RETAINER, INTAKE
VALVE
SP
RING 7744798
Q— L O CK,
SPRING
RETAINER
7744610
R— C
AP, CAMSHAF
T BEARING 7403352
S—SHAFT, ROCKER 7767
32 2
T—ROCKER, V
ALVE,
ASSY
7410281
U—BRACKE
T, ROCKE
R
SHAFT
7403353
V—COVE
R, VALVE ROCK
ER, INTERMEDIATE CYLINDE
R 7375436
W — B O L T, HEX-HD 735019
9
X—WASHER, LOCK
120214
Y—WASHER, PLAIN 502245
Z — B O L T ,
DLD-HEX-HD
7346679
AA—WASHER, PLAIN
7767318
BB—RETAIN
ER, EXHAUST
VALVE
SPRING
7539839
CC—
SPRING VALVE,
OUTE
R 7744799
DD—SPRING, VALVE, INTERMEDIATE 7
744800
EE
—SPRING,
VALVE, INNER 7744789
FF—ROTATOR, EXHAUST
VALVE 7539838
G G — - G UID E
,
EX
HAUST VALVE 7348533
HH—PIN,
COTTER
121223
JJ—NUT,
SLTD
7703684
KK—DEFLEC
TOR,
AIR
7376025
LL—STUD 7403515
M M — S T U D 7403097
NN—PIN, COTTER
12 12 2 4
P
P—NUT, SLTD 7
338679
QQ—INSERT (SEAT),
EXHAUST VALVE
7744609
RR—VAL
VE,
EXHAUST
7
346481
Continued
in valve stem groove.
Be certain that
lo ck
halves
are in the
groove in
the valve s tem. Release
compressor
care
fully until
spri
ng
retainer i
s
in position.
Position compressor an
d install
the intake
valve, springs, and
retainers in similar manner.
Be
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sure the exh
aust
valve rot
ators
(FF
)
a
re assem
bled on
exh
aust
v
alves onl
y.
Repl
ace the bearing
cap an
d valve
rocker
shaft brack
et
in
their origina
l posi
tion.
c.
All cylind
ers are
marke
d on
the rocke
r box
conta
ct flang
e,
intake
side,
showing
original installation
position. Replacement
cy
linders mu
st be
marked
si
milarly.
Install
the fu
el
pri
ming
nozzle
in each
cylinde
r.
S
ec t i o n VII
REB
UILD OF P
ISTO NS
P IN
S AND RIN
GS
66 D
isas s em
b ly o f P
is to n
Before
pisto
ns are
w
ashed,
check
to de
termine
if
all rings
a
re
free
in the r
ing groove
s. M
ark a
ny
stick
ing
ring
so tha
t
a
d
etailed inspe
ction
can
be
m
ade la
ter when
rin
g is removed
.
Rem
ove rings
with
remo
ver and
rep
lacer 41-R
-2378-
570
fig
. 61)
.
Ta
g rings
so
th
at servicea
ble ring
s may
b
e
insta
lled
i
n their
origin
al groov
es.
RE M O V
E R
A N D
REPLACER
41-R-2378
-570
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67
Cl
ean i
ng In
spec
t i on
an d
R
epa
ir o
f P
is ton
s P
ins a
nd
Ring
s
(1
) Clea
n
t
he pis
tons
and
r
ings
w
ith
carb
on-re
mov
er
sol
v
ent. S
crap
e o
ff rem
ainin
g
de
posit
s. A b
roke
n pis
ton
ring
makes
a
good
scraper
to
re move
deposits
from
ring
g
roov
es.
Be
c
arefu
l no
t to
s
cratc
h or
gou
ge r
ing l
ands
whe
n
scrap
ing
off
dep
osit.
B
e
ce
rtain
t
hat
o
il
dr
ain
ho
les
in th
e oil rin
gs a
nd
in t
he oi
l
ring
g
roov
es a
re cl
ean.
C
ar
bo
n can
be
re
mov
ed with
an
u
nder
sized
drill.
(2) Cl
ean
c
arbo
n depo
sits
f
rom pis
ton
p
ins an
d from
pis
ton
pin
bo
res w
ith
cr
ocus
clo
th w
et with
dry-c
lean
ing
sol
ven
t or
v
olat
ile m
iner
al
s
pirit
s.
(1
) E
xami
ne p
iston
p
ins fo
r n
icks,
sc
ratc
hes,
a
nd we
ar.
Usi
ng a
m
icrom
ete
r, chec
k
the
diam
ete
r of pis
ton
pins.
R
epla
ce
pins
wh
ich ar
e w
orn
be
yond
the w
ear
lim
its
spec
ified
in r
epai
r and
re
build
stan
dard
s (
par. 1
52).
R
epla
ce p
ins
ha
ving
a
ny de
fects
.
(2
)
Insp
ect pisto
n
pin
plugs
.
L
ook
fo
r
larg
e
w
ear
pa
ttern
on
end
s
of pl
ugs.
T
his is
a sig
n
of u
ndu
e wea
r w
hich
does
not
allow
the
piston
pin
to
be
centrally
positioned.
Nic
ks or
scra
tche
s
o
n e
nds
of pl
ugs,
o
r
cr
acks
in
an
y
p
art
of the
plug
, ar
e
caus
e
fo
r
rej
ectio
n.
Reje
ct
p
lugs
wi
th ex
cessi
ve
end
we
ar.
(3
)
Ins
pect
pis
ton
rin
g w
ear
surfa
ces.
Reje
ct
any ring
s
that
are
scuf
fed,
sco
red,
chip
ped, sc
ratc
hed,
or h
ave
ab
rasio
ns else
whe
re
on
the
ring
. Che
ck
the
ring
s in
the
pis
ton
g
roov
es (fig.
62)
for
side
clea
ranc
e. T
his
clearance
should
be
checked
around the
complete
di
ame
ter of
t
he groo
ves fo
r a
ll r
ings
. Mea
sure
men
ts mu
st
be
wi
thin
l
imit
s
sp
ecifi
ed
in
rep
air
a
nd reb
uild
stan
d
a
rds
(
par. 1
52).
Exce
ssive
rin
g c
lear
ance
c
an be
ca
used
by r
ing we
ar o
r
ring
la
nd we
ar. If
rin
g
clea
ranc
e is
les
s th
an no
rma
l, th
is
pro
bab
ly mean
s t
hat
the lan
d
be
twee
n th
e groo
ves is
sta
rting
to
b
reak
or
bind.
C
heck
the
pi
ston r
ing
gap
with
the ai
d
o
f t
he pis
ton
ring
g
age
and compressor
41-G-534-50
(f ig.
63).
Check
to
the
lim
its spe
cified
in
r
epai
r a
nd re
buil
d stand
ard
s (
par.
152
).
R
ejec
t any rin
gs
n
ot
w
ithin
we
ar
lim
its.
(
4)
Care
full
y exam
ine
ent
ire
pisto
n fo
r c
rack
s an
d flaw
s.
S
mal
l c
rack
s are
se
en u
nder
a st
rong
ligh
t as i
rreg
ular
dar
k
o
r bl
ack
stre
aks.
Repl
ace
an
y
crack
ed, war
ped,
or
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[
R A
P D
53
932
A
ND
CO
MPRES
SOR
—
R
PD
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distorted
pistons.
C heck
ring
groov
es
fo
r wear.
The
grooves must
be
within lim
its specifi
ed
in rep
air
a
nd
r
ebuild
stand
ards
(par. 1 5
2). Check the
diamete
r
of
th
e
piston
sk
irts
for
w
ear. C heck
the piston-to-cyl
inder
dimensi
ons
to
the limits specifi
ed
in rep
air and
re
build
standards (par.
1 52 ).
(
5) Inspect pist
on pin
c
ylinder
bores
for
wear,
c
racks,
or
abrasions.
Replace pistons which
have
bores worn
be
yond lim
its specifi
ed in
rep
air and
rebuild standards
(p
ar.
1
52) .
(6) All new p
iston
ri
ngs
should be
checked
in
the
groov
es
o
f the piston to
be sure
th
ere
is no
sticking
and
that
there is
the
proper
ring
side
clear
ance.
(1) Rejecti
on of pist
ons
for
scores and
scratches is a
mat
ter
of jud
gment.
Use a
fine mill
file
t
o rem
ove
metal
rai
sed
from
minor scores
and sc
ratches.
(2 )
Piston
rings
cannot be
repaire
d. Unservice
able
rings
m
ust
be
repla
ced.
(3) Pisto
ns are marked,
at orig
inal engine assembly, on
the
bottom of
the
p
iston pin boss,
accesso
ry
case end.
R e
placement
pistons
must
be
similarly marked.
68. A s s e m b l y
o f Pis tons P in
s
and
Rings
Using
new
rin
gs
as req
uired, install pis
ton
rings in
their
origin
al
positions
with rep
lacer 41^R-237
8-570 (fig. 61) . C are
must b
e
u
sed
w hen
installing
the
rin
gs s
o
t
he
ri
ng lands
will not
b
e
sc
ratched and
the
rin
gs will not
be distorte
d.
A ssemble
piston pins
and p
iston pin plugs
in
the
pistons.
Check
to be
certain
pin
turns
fre
ely
in
the piston
bo
re.
Sec t io
n V
III.
REBUI
L D OF CR
A N K CA SE
69. Cle
a n i n g
I nsp
e c t i o n
a
nd
Repai r
o f Crankcas
e
(
fig.
65
)
(1 )
W ash
the
two
cran
kcase
halves
th
oroughly with
dry-
clean
ing
solvent
o
r
volatile
mineral spirits.
(2)
Remov
e
the
plugs
from ends
of the two
main oil pas
sages
an
d fro
m th
e sides of the case
opposite the mai
n
be
aring w eb
s.
Remov
e
the crankc
ase
breather
line
hos
e elbow
(K) from
side of the case. Flow
clea
n
dry-
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C
O
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clean
ing so
lvent
or v
olatile
minera
l
sp
irits
th
rough
o
il
passag
es. Use
a
pro
be, if
neces
sary, to
dislo
dge
sludg
e
dep
osits.
A
ll
pa
ssage
s mu
st be
cle
an
an
d
free of
chi
ps
an
d
s
ludge.
1
) C
areful
ly check
crankc
ase
castin
gs
for
crac
ks and
flaw
s
with
the aid
of a stro
ng lig
ht o
r th
e
l
atest pro
cess a
vail
able.
Check
especia
lly
at bas
e of
stu
ds
and
a
t shar
p
radiu
s of flan
ges an
d
areas s
urroun
ding
main
bearin
g
suppor
ts. Smal
l cra
cks p
robab
ly
will lea
d
t
o m
ajor
engin
e troubl
e later
on.
T
he
crank
case halv
es are
suppli
ed as
an assem
bly
73
75413. If
one half
is crack
ed, re
place bo
th
halves
.
(2)
Inspec
t
co
nditio
ns of
matin
g flang
es
and mou
nting
pads.
Exam
ine th
e
cyl
inder
mou
nting
pads
and loca
ting
bores
for
any
dama
ge ca
used by
carel
ess re
mova
l of
crank
sh
aft an
d conn
ecting
rods
. C
heck fa
n dri
ve
h
ousing
to
the
lim
its specifi
ed in
r
epair an
d
rebuild
sta
ndard
s (p
ar.
15
3). L
ook for
disc
olorati
ons,
on the
cran
kcase m
ount
in
g flang
es, wh
ich
may i
ndicate
an oi
l leak
.
(3)
C
heck studs.
All
damag
ed or
lo os
e stud
s must
be
marke
d
for rep
lacem
ent.
C he
ck th
e
sp
ecial
cran
kcase
alinem
ent
dow
el-type
bolt
holes
in the
cran
kcase
for o
versiz
e,
elo
ngation
,
an
d
obviou
s
sig
ns
of misal
ineme
nt.
(4) C
heck th
readed
openin
gs in
o
il pass
ages.
Mark
dam
aged
th
reads
fo
r repair
as le
akage
ma
y
d
evelop
on as
se
m bly of
pl
ugs.
(5)
B e
sure
that
bearings are
clean
and
that
oil
holes
are
open
. Use
a
wo
oden
pin
or slive
r to
clean o
ut any
sludge
accum
ulatio
n
from
o
il g
roove
s. A har
d or
sha
rp-edg
ed too
l
can e
asily
dama
ge
soft b
earing
met
al.
T
he
inspe
ction o
f beari
ng su
rfaces
ca
nnot be
specif
ied
exact
ly. It is,
there
fore, l
argely
a ma
tter of j
udgm
ent
an
d e
xperien
ce. The
foll
owing
ge
neral prac
tices will
as
sist
in d
etermi
ning w
hether
a
bear
ing is
ser
vice
able
or
shou
ld be re
placed
.
If bea
ring
sur
face sh
ows sign
s o
f
s
epara
ting
fr
om
th
e under
lying
m etal
, replac
e t
he bear
ing.
Sc
ratche
s
on the
beari
ng ar
e
not
cause fo
r rej
ection
unles
s th
e
su
rface
area d
estroye
d is
ov
er 5 per
cent
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of the
bearing face. Replace bearings showing
raised metal
at ed
ges
of the scratches.
Some
loss of bearing metal from the
grid
p
ockets is
not
unusual
and is
not
ca
use for
reje
ction unless
the
area
affected i
s
over
25 percent of the total
area.
Small
par
ticles of foreign
matter, im bedded
in
the
surface, are no
t
cau
se for
rejection a
nd no attempt
should
be made to remove
them
. However,
if
a
con
centration of imbedded particles affects
5 percent
of the surface, replace the
be
aring.
The seriousness
of the
above
defects is, of necessity,
a
matter of good judgment.
If
these is a
reason
able
doubt as
to
the
ability
of any
bearing
to
con
tinue
in
satisfactory
ser
vice,
it
should
be replaced.
(c) Check
the bearing
thickn
ess
to the
limits
specified
in
re
pair
and rebuild
standards (par.
153).
Bearing
thickness is measured
at
the
middle of bearing.
Never shim a worn bearin
g. A sh im f
itted
bearing
is
not
round because one diameter is constant
and the other is
varied
by
t
he shims.
Examine
the
thrust face
s of No. 3 main or
thrust
bearing.
Look
for
any
above
mentioned
defects.
C
heck thickness
to
limits spe
cified
in
repair
and
re
build standards
(par.
15
3).
D o not mar or
destroy identification m
arkings. Main
bearin
gs must be installed in
their original
po
sitions.
The marking
is etched
on the
steel
back.
Never use
a
sc
riber or sharp
tool
to mark bearings.
Use
a
grease
pencil.
(/)
Pinch
check
and
bore
check
main
bearings
as
follows.
Spread a thin
coat of prussian blue
e
venly over
the
steel backs of the bearing
s. Assemble them in
their
o
riginal positions and
locations in the crank-
case halves.
Assemble
the two
crankcase
halves and
install
the
crankcase cross bolts and nuts. U
se straps 41-S-
5906-300
(fig. 23)
on
the cylinder pad bol
ts an
d
large
washers
on
the other
cross
bolts.
Using
a
torque wrench,
tighten all nuts to
750 Ib-in
by
pr
ogressively tigh
tening
nuts to 3
00 to 600, and
then 750 Ib-in.
Check the bore of each main be
aring to
see
w
hether
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it is within
limits
spec
ified
i
n
repair
and
rebuil
d
stand
ards
par. 154).
If bore
check does no
t come
w
ithin limits, in
stall
a ne
w bearin
g and
repeat the
check.
C
heck
the
c
learance
betw e
en the
inner
thru
st bear
ing
flange
and the crankcase
web.
If
clearance
is
less
tha
n
0.002
or
m
ore
than
0.008
inc
h,
rep
lace
the
bea
ring.
Di
sassemb
le th
e
cr
ankcase
and
chec
k the bearin
g
back
c
ontact
as sh
own by the
blue
tr
ansfer. Bear
ings mus
t make
75
per
cent c
ontact.
If
no
t, install
a new be
aring and
repe
at
the
check
.
(1) Replace defective
studs
par.
57).
(2) Rep
lace
de
fective R
osan
inser
ts par.
57).
(3) C
lean up to
rn or d
amaged
threads in t
hreaded
op
en
ings
. Use
an
old pipe
tap so
threads
are
n
ot cut
over
size.
If threads
will
n
ot clean
up,
reta
p
the
hole t
o the
n
ext larg
er size
plu
g.
(4
)
Remov
e minor
n
icks
an
d scratc
hes w
ith an
oi
l stone
.
Scratch
es acr
oss a m
ating
flange, w
hich m
ay
lead
to
oil
le
akage, cann
ot
be rea
dily
repaired
.
Replace any
ca
sting with
this
d
efect.
70
A
ssembly
of
C
r an k c a s
e
As
sembly
(f
ig.
6 5
)
Insta
ll the c
rankcase
b
reather
line hose
elb
ow
(K) i
n
sides of
case
.
In
stall
all pipe
plugs in
oil pass
ages opp
osite main
b
ear
ing
s, in
flange
of oil pan
contact
s
urface, and
in
the
ends o
f
th
e
main
oil
passages
on
flywheel end.
Refer
to
paragraph
103
for
assem
bly of
cran
kcase
halv
es.
S e
c t i o n
IX. R E B U IL D
O F C
R A N K S
H A F T A
ND CONN
ECTING
R O D A S S E
M B L Y
71 D i s
a s s e m b l
y
of
Cra
nkshaf
t
As
sembly
a
. Remove th
e
spring around
the
cra
nkshaf
t oil
seal with
spring
assembly
(CC,
fig.
6 5)
and discard
the
seal.
Rem
ove the
cotter
pins an
d slotte
d nu
ts
fro
m the
connect
ing
rod bolts
(fig. 64)
. L
oosen and
remov
e
th
e
connecti
ng rod
ca
ps.
Remov
e
the
rods and
bear
ings f
rom the c
ranksha
ft.
If
nece
ssary,
t
he c
aps
can be
lo
osened b
y tap
ping gently
w
ith a
soft
hammer
1 41
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A—T
UBE,
BA
LANC
E,
IN
TAKE
MA
NIFO
LD 73
48816
B—GA
SKET
, O RIN
G
501232
C
—FLA
NGE,
BA
LANC
E TU
BE 734881
5
D—B
OLT,
DLD
-HEX
-HD
7
403158
E—
PIN,
COTT
ER 121
224
F—N
UT, SLTD
,
CRO
SS BOL
T
73
38679
G
—SPA
CER,
CRO
SS B
OLT
73726
89
H—BOLT, CROSS,
CRANKCASE
73 72684
J—
PLUG,
P
IPE 7767
33 6
K
—ELB
OW, HO
SE, CR
ANK
CASE BR
EATH
ER
LINE
208803
F
L—C
RANK
CASE
,
HALF
, R
IGHT
(1-3-5
) SI
DE 7
403360
M—
WASH
ER,
P
LAIN
776731
8
N—
NUT, PLA
IN
22 685
4
P—NU
T, J
AM
107 82 3
Q—NU
T,
J
AM
107 82 2
R—N
UT, PLAI
N
22 585
3
S—W
ASHE
R, PLAIN
50224
5
T—
PLUG
, PIPE
753
8997
U—
PLUG
, PIPE
753899
0
V—PL
UG,
FAN TO
WER 7
346653
W
—GA
SKET
, AN
NULA
R 1
42756
X—
WAS
HER, PL
AIN,
F
AN TO
WER
PLUG
7346
692
Y—NU
T,
SLTD
77036
84
Z—
PIN, C
OTTE
R 1212
23
AA
—TUB
E,
OIL,
CR
ANKS
HAFT
7
403345
BB
—NUT
, SLT
D
2258
69
CC—
SEAL
, OIL,
C
RANK
SHAF
T,
W/SPR
ING,
A
SSY 774
4599
D
D—PL
ATE,
RETA
INING
, OIL SE
AL
77446
00
BE—W
ASH
ER,
PLAIN
50
2266
FF—
BOLT
, DLD-
HD 68
3758
GG—
PLUG
,
PIPE
7
767337
HH—
NUT,
JA
M 1
07381
JJ—
NUT,
PLAI
N
22586
5
KK—
WASH
ER, PLA
IN 77
25882
LL—
RING
, SNA
P
74
10378
MM—
SLIN
GER, OIL
, CRAN
KSH
AFT 73
76052
NN—
CRA
NKSH
AFT
AND
DAM
PER
HUB
, ASSY
73
46489
PP—
BEAR
ING,
FA
N DR
IVE H
ORIZO
NTAL
SHA
FT BE
VEL
GE
AR
7
351189
QQ—
CRA
NKCA
SE, HA
LF,
LEF
T (2-J-6
) SIDE 7
403361
RR—
WAS
HER, PLA
IN
502
20 4
SS—B
OLT, DO
WEL-T
YPE,
CR
ANKC
ASE ALIN
EME
NT 74
10047
T
T—PIN
, DO
WEL,
FAN
DRI
VE VE
RTIC
AL SHA
FT B
EARIN
G
733866
8
UU—
BEAR
ING,
FAN
DRIV
E V
ERTIC
AL S
HAFT
735 1
157
VV—
BOLT
,
HEX
-HD
73
46715
WW—WASHER,
PLAIN
73 75429
XX—
BOLT
, LO
CKING
, FAN
DRI
VE HO
RIZON
TAL
SHA
FT BE
ARIN
G 73
75421
YY
—BOL
T,
H
EX-H
D 7346
723
ZZ
—BO
LT,
HEX-H
D
73
46696
AB—B
OLT,
HEX
-HD CO-
525118
A
C—W
ASHER
,
PLA
IN 772
5882
AD—
BOL
T, DOW
EL-TY
PE,
CRAN
KCA
SE ALIN
EMEN
T
741 0
05 S
AE
—FLY
WHE
EL, W
/DOW
EL
PIN,
ASS
Y
75
21190
AF—
LOC
K,
F
LYWH
EEL
B
OLT 77447
83
AC
—BO
LT, D
LD-H
D, FLYW
HEE
L TO
CRAN
KSHA
FT 77
44627
AH_B
EARI
NG,
BALL
, TRA
NSMIS
SION
SH
AFT PI
LOT 75
39700
AJ
—RIN
G, SN
AP 74
10377
AK—PLUG, OIL,
CRANKSHAFT
(FLYWHEEL
END)
7744891
AL—
PIN,
DOW
EL 74030
12
AM—
SCRE
W, SET
. HEX-
SOCK
ET
140 82
9
AN
—GAS
KET, O R
ING
501
23 4
A
P—BE
ARIN
G, MA
IN, CR
ANKS
HAFT
7
376702
A
Q—B
EARIN
G, M
AIN, CRAN
KSHA
FT,
THR
UST 7376
703
A
R—ST
UD 740 30 7
0
C
ontin
ued
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Do not strike near
the parting
lines.
Use car
e in handling th
e
connecting rod
bearings as
they
are easily damaged.
Look
for
connec
ting
rod an
d bearing
loca
tion identification
numbers. Mark
an
y connecting rods
or bearings if the numbers are not legible.
c.
Remove
the
four d
rilled-head
bolts holding the counterweight
stop
plate
(B,
fig.
70)
to
the crankshaft
damper
hub.
Center
the
crankshaft da
mper
counterw
eight
holes
with the
mating holes in
the hub, and r
emove the four dampe
r counterweight pins (C ,
fig. 70)
from two counterweights.
Sl
ide the tw o
counterweights
off the
hub
.
Remove
the cotter pins fr
om
the four
damper female
coun
terweig
ht
pins (K, fig. 70) which
hole the
two remaining counter
weights.
Use
wrenche
s 41-W-
870-50
(fig. 66) to unscr
ew the
four
pins.
Remove
the
four
damper
male
counterweight
pins
(H, fig. 70), pin
bushings (J, fig. 70), and
the female pins.
Re
move
the two counterweight
s.
Remov
e
the transmission
sha
ft pilot
ball bearing
(A H,
fig.
65)
from the bore
of
the flywheel flange.
/. Remove in
ternal snap ring (AJ, fig. 65)
holding the flyw
heel
R A
PD 155936
14
4
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en
d cran
ksh
aft
oil
pl
ug (AK
, fi
g. 65) in
pos
ition
.
R
emov
e
the
plug a
nd dis
card
the
0
rin
g gask
et.
a. C lean
all
parts
thoroughly
with
dry-cleaning
sol
ven
t
or
vo lat
ile min
eral
sp
irits.
F
lush
out
t
he
oil
passa
ges f
rom
the
jou
rnal
s to
th
e cran
kpins
.
(1)
Th
e cra
nksh
aft
and
v
ibra
tion
dam
per hub
as
semb
ly
are
furn
ishe
d as on
e
unit
an
d stock
ed a
s su
ch.
Th
e
hub
is not
re
place
able
.
Continued
operation
of
the
engine
is
dependent
upon
the
c
once
ntric
ity of
th
e
cra
nksh
aft
main
b
earin
g
jou
rnals
an
d co
nnec
ting
rod
jo
urna
ls.
Exa
mine
the
jou
rnals
care
fully
f
or any
ni
cks,
bu
rrs,
groo
ves,
galli
ng,
or
ha
mme
red
and
out-o
f-rou
nd cond
ition
.
(c)
Chec
k
ma
in be
aring
an
d c
onne
cting
rod jo
urna
l di
a
mete
rs
and
th
e cr
anks
haft
run-
out
to the
lim
its spe
ci
fied
i
n
rep
air a
nd r
ebuil
d
stand
ards
(p
ar.
154)
. To
c
heck
run
-out,
s
uppo
rt the
cr
anks
haft
in
V
block
s
by
t
he
end
jo
urna
ls an
d ch
eck
wi
th
a
di
al
indic
ator.
Reg
rindin
g of
crank
shafts
is
not per
mitted
.
Howe
ver,
very
fine
ma
rking
i
n
the t
hrust
a
rea of
t
he c
rank j
ourna
ls may
be
pol
ished ove
r if
new h
earing
s
are to be
instal
led.
Shaft
s
re
quirin
g re
grind
ing m
ust be
replac
ed.
Loo
k
f
or
a
ny ind
icati
on of the
co
nnec
ting
rods
to
uch
ing o
r rubb
ing
th
e
crank
shaf
t dur
ing
o
pera
tion.
Scra
tche
s of an
y k
ind
are
par
ticul
arly
dang
erou
s
to
satisfactory
crankshaft
life
and
may
be
the
cause
o
f
a
fut
ure
fa
ilure
.
If
magn
aflux
equ
ipm
ent is avai
lable
,
in
spec
t the
cr
anks
haft by
th
is met
hod.
If
ma
gnaf
lux is
not
avai
lable
,
car
efull
y insp
ect t
he
cran
ksha
ft w
ith a
mag
nifyi
ng gla
ss
for
c
racks
, parti
cula
rly
in
th
e
are
as
ar
ound
the
cran
ksha
ft oil
tube
h
oles
and
fil le
ts ad
jace
nt
to t
he cheek
s.
If cr
acks
are
d
iscov
ered
, rep
lace
th
e cr
anks
haft.
(/)
Examine the
crankshaft
carefully
for
any
signs
of
scu
ffing
or
ov
erhea
ting
. Such
s
igns
are a
n in
dica
tion
of a d
efect
ive
bea
ring.
'Che
ck
the
beari
ng again
.
Insp
ect the
cra
nksh
aft v
ibra
tion
dam
per hub
c
are
f
ully.
Exam
ine
pin
bores
fo
r ev
id en
ce of
crac
ks,
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scoring, or ou
t-of-round condition. Defects cannot
be corr
ected and the crankshaft must be
replaced.
R
emove the safety
wire
an
d check damper hub bo
lts
(G, fig. 70) to 1 ,
000 Ib-in torque. Note any evidence
of
hub movement on splined
shaft
a
nd dowel pins.
Shoul
d
evidence
indicate hub is not pro
perly
secured,
r
eplace the crankshaft.
Replace the
locking wire
after
retorquing the
hub bolts.
The bolts should
not
b
e
removed.
Check th
e
cond
ition of the main
accessory drive shaft
spline.
Look
for worn
or
damaged splines.
(/) Examin
e the
dowel
pins in the
flywhe
el end
flange.
Pins
must
be tight, not out-of-round
and show
no
signs
of
defects.
Replace
questionable
dowel
pins
(par. 88).
(2 )
Carefu
lly
examine
damper counterweight pin
bores
(fig. 70)
for evid e
nce
of cracks,
scoring, or out-of-
round.
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If a damaged
part
is
found,
all dam
per
counte
rweights
m
ust
b
e
replac
ed. The
weights of these
parts ar
e
m
atched
ac
curately at assem
bly,
and
the critic
al balance
might be
destroy
ed
by the substituti
on of an un
matched
pa
rt.
Exam
ine the pin bush
ings, damper solid
pins, and
pin
flanges,
for
cracks,
roughness, wear, and
out-of-
roun
d.
Replac
e da
maged
p
arts. Each
of these
indi
vidual pa
rts is preci
sion
made,
and
interchan
geability
does not des
troy the critical bala
nce of the assemble
d
uni
t. C h eck to
the limits specified
in repair and
re
build
standards
(par.
1
54).
(3)
Inspe
ct
the
connecting rod
s very caref
ully as close
limits
are
specified
in
repair
and
rebuild
standards
(par.
154) .
C heck
t
he rods
for
twist and
bend
using
any o
f the standard
tools designed
for
that pu
rpose.
Do
not
at
tempt to straighte
n
a bent rod. R ep
lace it
wi
th a new
rod.
(6) Check
the connect
ing rod bolts ver
y
ca
refully. R e
place
any bolts
that
do
n
ot fit
snugly
when assemb
led
in
position
in the connecting
rod.
Examine th
e
threads
and
look
for
any
evidence of
galling
on
the
pilot diamete
r near the
center of
the
b
olt.
L oo
k
for
stretching,
cracks, or
scratches on any
porti
on
of
the
bolt.
Ligh
t scratches
on
the
bolts
may serve
as a
starting poin
t
f
or a fatigu
e crack. The
bolts are
highly s
tressed during engi
ne operation. Replace
all
bolts
about which there
is
the sl
ightest doubt.
(c) C lean
carbon
deposit from
piston pin bores
with
crocus
cloth,
wet
with dry-cleaning
solvent.
Examine
bores
for scor
ing or cra
cks and
c
heck pin
fits in
bear
ing
s to
s
ee that they
are free. C h
eck to
the
lim
its
specified
in repair a
nd rebuild stand
ards (pa
r. 152) .
Check
the
wear
and
sur
face
co
ndition of t
he con
necting rod
bearings. The
bearings
should be re
placed
if
the bearing metal
shows signs o
f
b
reaking
loos
e
or pi
tting in
spots.
Check
bearing
thickness
to
the limits
specified
in
repair
and
rebuild
standards
(par.
154). Inspect
oil
holes
an
d grooves in bearing
s
to
be
sure they are clean
.
L
ook
for identificatio
n
mark
ings and renew
m
arkings
with
a
greas
e pencil
if
necessary. N e
ver use a
scriber or sharp
tool
to
mark bearing
s.
14
7
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(1)
Polish
out any fine scratches
on main
and connecting
rod journals, using crocus cloth and dr
y-cleaning sol
vent or volatile mineral
spirits.
(6)
Scratches or
scuffing
on
the
cr
ank che
eks
must
be
removed or the
shaft must be
rep
laced. Scratches
of
a
ny
kind a
re
dangerous
and
may lead to
a
future
failure.
(c)
Dowel pins are replaceable.
Oversize pins are avail
able for
rep
lacement (p
ar.
88). Loose
n the three
small hex-socket set screw
s (AM, fig. 65) in the
out
side
edge of the
crankshaft
flange
and
extract the
dowel
pins
(AL).
(2)
Piston
pin bearing
s
are replaceable.
Press
the
bear
ing from the co
nnecting rod. To install
a new
bear
ing, heat the
bearing
end
of the connecting rod
to
350°
F.
Shrink the bearing with
dry ic
e; then
press
it
into
place. Bore and ream
the
be
aring to the limits
s
pecified in repa
ir
and rebuild
standards
(par. 154).
Whenever
new
beari
ngs
are
installed,
they
must
be
pinc
h checked in the mating conn
ecting rod and bear
ing cap (fig. 67). Place the rod
in
a
vise w
ith soft
jaws. Install th
e
two
bearing
hal
ves in the rod and
cap. Assemble the bolts
to
secure
the rod and cap
firmly b
ut do not
tighten
.
Insert
a
0.0015-inch feeler
gage in
the joint on one sid
e
between
the rod
a
nd cap.
Tigh
ten the
bolt
on the
opposite
side to 550 Ib-in
torque. Next,
tighten
the
bolt
on
the
feeler
gage side
with a torque w
rench until the
cap
begins
to
pin
ch
the feeler gage.
The
torque
required to reach this
condition should
be between 250 and 450 Ib-in.
If
the torque required
is not with
in this
limit
, another
bearing should be installed and
the test repeated.
W he
n
n
ew b
earings
are
installed,
make
certain
they
are
marked
with
id
entifying location
numbers cor
responding
to
rod numbers.
7
3. A s s e
m b l y
o f
Crankshaft A s s e m b l y
Assemble th
e
connecting rods
and
their
bearings
to the
crankshaft.
Make certain that rods and bearings are
in
thei
r
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proper
location
according
to identifying numbers.
(Rod numbers
are
on
the bottom, or oil pan
sid
e,
whe
n
the rods
are
posi
tioned
in
the cylinders.) B
earings
and journals should be lubricated
with engine oil at
asse
mbly.
Conne
cting rod bolts
should
be
inserted from the
rod side, and the
wing
bolt
heads
should be
properly seated in the recesses
provided. Tighten the nuts
evenly
and torque to 800
Ib-in. The
torque
range on these bolts
is
75
0 to 850 Ib-in. This
range is provided
to permit
alinement
of
the slotted n
ut and bolt cotter pin hole.
When
th
e
rods
are assem
bled, make certain
that
the
side
clearanc
e of the rods and
be
arings
on the crankshaft
is to
the
limits specified
in
repair
and rebuild
s
tandards
(
par.
154). Replace parts not
within
these limi
ts
with
parts
which
are within
these
limits.
Examine for cotter
pin
alinement and tighten
nuts
f
urther until
cotter
pins
can be in
serted. In
sert
cotter
pins.
Assemble two of
the
four counterweights
to
the
crank
shaft
damper
hub,
u
sing
the
damper
male
counterweight
pins (H), pin
bushings (J),
and
the
damper fe
male counterweight pins (K,
fig.
70) in the positions shown in
figure
66. Note that
the
coun-
I ? A P D ~ 1 5 5 9 3 8
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terweights must
be loca ted
between counterweights stop plate
bolt holes
in order to install the
counterweight stop
plate
w h e n
the
counterweights
are in
place. Tighten
the
pins, using
w r e n ch
41-W-870-50 (fig. 66).
Line
up
the s lo ts in
the
f emale p in
nuts
with
cotter pin holes in
male pin and
install the
cotter pins.
Assemble
the other
t w o
counterweights
to
the
hub,
using
the
damper counterweight pins (C, fig. 70).
Assemble
the counter
weight
stop plate (B, fig.
70)
to the hub
and
secure with four
bolts
and
safety
wire (fig. 69).
Install a n e w 0
ring
gasket
o n
the
crankshaft
(f lywheel
end)
oil plug
(AK,
fig. 65). Install the plug in the
f lywheel
end
o f the crankshaft. Insert internal snap
ring
(AJ, fig. 65)
in
the recess provided.
Place a n e w crankshaft oil
seal
with spring assembly
(CC,
fig. 65) on
crankshaft
at the
f lywheel end f lange. The
closed o r
flat s ide o f the seal is towards the f lywheel f lange. Install the
spring by connecting the t w o ends and
inserting
it in the oil
seal
groove .
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A
—BOLT, DLD-HD
PL
ATE
583741
B—PLATE,
STOP, COUNTERWEIGHT
7346 6 1 4
C—PIN, COUNTERWEI
GHT 7744596
D—COUNTERWEIGH
T, DAMPER 7521267
E—HUB, CRANKSHA
FT DA
MPER
75
3 9 7 0 1
F—RING,
SNAP 7410378
G—BOLT,
DLD-HD,
H
UB 7767530
H—
PIN,
CO
UNTERWEIGHT,
M
ALE
737
2 6 9 6
J—
BUSHING,
PIN 7 3 4 6 4 9 3
K—PIN, COUNTERWEIGHT,
FEMALE 7372
6 9 7
L—PIN,
COTTER 121224
Sec t io n
X. REBUILD OF OIL PUM
PS
74 S
c avenge r and Pressu r
e
Oil
Pu m p
D
u a l U n
it )
(fig.
71).
(1 )
Remove
lockin
g wire
, slo
tted
nuts,
and
p
lain
washers.
Remove
the
drive
gear support
assembly
(AA).
Remove
the drive an
d driv
en (2)
bevel
ge
ar ( B B ) and
its
s
nap
ring
(Y).
Refe
r to parag
raph 5
1 for removal of
drive
s
haft
(Z
).
(2) Rem o
ve
the
drive and driv
en (2)
bevel
gear (BB
)
from
the
scaveng
er
pump
housing
(P).
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(3)
Remove
locking wire, slotted nuts,
plain
wa
shers, and
drill
ed-head bolts holding the
scavenger pump housing
(P), and pressu
re
pump
housing
(F)
together. Remove
the
scavenger pump
hou
sing, tapping with
a
soft
ham
m
er
if
necessar
y.
(4)
Lift
out the scavenger
pump
driven
impeller (N)
from
the
housing.
(5
)
Tap the scave
nger pump drive impelle
r (M) with
a
soft
hammer and re
move it from the
pres
sure pump
drive impeller with
shaft (H). Remove the
W oodruff
keys (EE) fr
om
the
drive impeller shaft.
(6) Compress
the
ring gasket (K)
on
the separator
plate
assem
bly (L) by applying
hand pressure.
This
operation
recedes
the
ring
on
one
side
and
extends
it
ab
ove the
retainin
g f
lange
on
the other
side. It can
then be
pried
off.
Remove gas
ket.
(7) Tap the
separator
plate assembly
(L) gently with
soft
hammer.
A
void
striking
the
outer flange
extremities
as the
0
ring
gasket groove is
easily
fractured.
Remove the plate assembly
from the pressure pum
p housing (P).
(8) Remove
the pressure
pump drive impeller
with shaft
(H).
(9) Remove the impeller driven
shaft (J) from the pressure
pump housing (F) and
slip off
the pressu
re pump driven
impeller (G).
(10) Rem
ove
lock
ing wire, slotted
nut, and plain washe
rs
from the stud
in
the
bottom
of
the pre
ssure pump
hous
ing and slip
off
the press
ure pump screen
assembly
(C).
(11)
Remove
locking
wire
and slotted
nut
in
the
bottom
of
the pre
ssure pump h
ousing
(
F)
and remove the driven
impe
ller shaft locking plat
e
(E
).
(1) Clean
all parts with dr
y-cleaning solvent or
volatile
mineral
spirits.
(2)
Examine the
pump mounting
surfaces and
all
mating
faces
for
nicks
and scratches. Remove any ra
ised
metal with
a
f ine
mill
file.
No gaskets
a
re
used
on
these
f
aces, so
they mus
t be free from
imperfections
which would impair
a
tight
oil seal.
Inspect the gea
rs and
sha
fts by magnaflu
x. If this
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met
hod
is
not available
, use a magnify
ing glass t
o
check
for cracks.
Cracked
parts are
defective
below).
c) Ex
amine the
gears for abrasions on
the
t
ooth face
s
and
for burrs on
the tooth
corners.
Examine the
shafts
for
scoring or
galling.
P
ump
parts are not
interchangea
ble. Any pump
with
defective
parts must
be rep
laced wit
h a
new
pu
mp
assembly. G o o d
judgment must
be used i
n
determinin
g wh
at
parts
are defec
tive in cases of
m
inor imper
fections.
(/) Check
all
parts to the limits specified
in
repair and
rebuild stan
dards (par.
155).
(fig.
71).
(1)
Install the pressure pum
p
d
riven im
peller
(
G ) on
the
impeller dr
iven shaft (J) from
the m
illed-locking face
end
. Insert th
e sha
ft in
the
bearing o
f the p
ressure
pump housing
(F
),
and
secure it with
lockin
g plate
(E),
slo
tted nut, and
locking wire.
Lubricate all gea
rs,
s
hafts, and
bearings with
engine oil.
2)
Install
the
pressure pump
screen asse
mbly (C ) on
the
drilled
st
ud in
the bottom of the
pressure pump ho
using
(F).
Secure with plain
washer, slotted
nut, and lo c
k
i
ng wire.
(3)
Install the p
ressure
pu
mp drive im
peller with
s
haft (H)
in the p
ressure pump
housing.
4)
Install 0 ring
gasket K) on the separator
plate L)
and install
the separator
plate assembl
y over the
shafts,
matching
the
dow
el pins
with the pro
per dowel holes
in
t
he pressure pump
ho
using.
5)
Ins
ert th
e
W o od
ruff keys (EE)
in the p
ressure pump
d
rive impeller
with shaft (H
)
and
slip
on the
sca
venger
pump driv
e
impe
ller (M)
.
Ins
tall the scavenger
pump
driven impel
ler (N) on
the impeller d
riven shaft (J).
(6)
A sse
mble
the
sca
venger pum
p
ho
using (P)
to the sep
arator
plate assembl
y
L) a
nd p
ressure pump hous
ing
(F),
and
secure
with
drilled
bolts ,
plain washers,
slotted
nuts, a
nd
lock
ing wire.
7)
Install the drive and
driven 2
)
bevel
gear BB)
in
t
he bearing in the
scavenger pum
p
h
ousing assem
bly
(P).
8)
A
ssemble
the drive an
d driven 2) bevel
gear BB)
in
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A—NUT, SLTD
225869
B—WASHER, PLAIN
502245
C—SCREEN
,
PRESSURE
PU
MP,
ASSY
73465
97
D—
NUT, SLTD
225838
E—PLATE
,
LO
CKING
774 4628
F—HOUSING,
PRESSURE
PUMP
7403349
G—IMPELL
ER,
DRIVEN, PRESSU
RE
PUMP 7403
085
H—IMPE
LLER, DRIVE,
PRESSURE
PUM
P,
W/SH
APT
7403348
J—SH
AFT, D
IVEN,
IM
PELLER
7403083
K—GA
SKET, O
RING
7372649
L—PLATE SEPARATO
R, ASSY 7
4 03355
M—IMPELLER, DRI
VE,
SCAV
ENGER PUMP
74 0
3086
N—IMPELLE
R,
DRIVEN
,
SCAVENGE
R
PUMP
7403087
P—HOUSING,
SCAVENGER PUMP
7403379
Q— BO
LT, DLD-HD 58
3757
R—NUT,
SLTD 7703684
S—WASHER, PLAIN
502204
T—
STUD 74 0
3068
U — BOLT,
DLD-HD
7346710
V
—LINE,
OU
TLET, SCAVENGE
R
PU
MP
7348752
W—L
INE, SUCTION, SCAVENGER
PUMP
7346673
X—
GASKET,
SUCTION LINE
7346510
Y — R IN
G , SNAP 7348754
Z—
SHAFT,
DRIV
E
73465 05
AA—
SUPPORT, DRIVE GEA
R, ASSY 7376
028
BB—GEAR,
BEVEL, DRI
VE AND D
RIVEN (2) 73465 32
CC —
STU D
7403070
DD—STUD— 7403
075
EE—KEY, WOOD
RUFF 1245 45
FF—STUD 735
020 4
G G —STUD
7403512
Continued
the
drive gear support assemb
ly (
AA). Install
snap
ring (Y) in the
drive
bevel gear.
(9) Install the
drive
ge
ar support
assembly (AA
), and drive
and driven
(2) bevel gear (B
B), with
snap ring (Y),
on
the
scavenger
pump housing,
meshing
both
drive
and driven
(2) bevel
gears
(BB).
Secure
wi
th plain
washers, slotted
nuts, and lo c
king
wire.
See pa
ragraph
107
for
inst
allation o
f drive
shaft
(Z).
Check
bac
klash
between
bevel
gears in
repair and
rebuild sta
ndards
(par. 1 5 5 )
.
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7
5
Rebu i
ld o f
A c c
esso ry
Cas e
Scaven ge
r Oi
l
Pu m p
(fig.
7
2).
(1)
Remo
ve t
he bevel gear (A)
from
the scaven
ger oil
pu
mp
housing
co
ver (D).
(2)
Remove
locking wire,
slotted nuts,
and
plain
washers
from t
he
ho
using
studs and rem
ove cover.
Gen
tly
t
ap
the
cover
w
ith a sof
t h
ammer to remove
it
from the
dowels
.
(3) Remov
e the
drive
impeller (K
) and drive
n
im pel
ler (E
)
from the oil
pu
mp
housi
ng
asse
mbly (F
).
(
4) Remo
ve wire
, slotte
d nut, and p
lain washer
from
the
botto
m
o
f
t
he
pum
p
hous
ing. Then
s
lip
of
the
pressur
e
pump
screen
assembly
(H).
(1)
Cl
ean all
parts with
dry-clean
ing
solv
ent o
r
vo
latile mine
ral
spir
its.
(2)
Exa
mine
the
pum
p
mountin
g
face
s an
d
all
mating
surfaces
for ni
cks
and scratch
es. Rem
ove exces
s
meta
l with a fine
mill file. N
o ga
skets are
used on
these
faces,
so
th
ey mus
t
be
free f
rom
imperfecti
ons
which
wou
ld impair a
tig
ht oil seal.
Inspect th
e im
pellers a
nd
gea
r by magnaf
lux. If
this
m
ethod
is not
a
vailable,
us
e
a
magnify
ing glass
to
inspec
t
for crac
ks. Crac
ked pa
rts a
re
defec
tive
below
).
(
c) Exami
ne the
i
mpellers and
g
ear
fo
r
abrasion
s
o
n the
to
oth
faces an
d for
burrs
o
n the
tooth corners
. Exa
m
ine
the shafts
for
scori
ng or galling.
Pump
parts are n
ot i
nterchang
eable.
A ny
pu
mp
with
de
fective
parts must
be r
eplaced with a n
ew pump
asse
mbly. Good
judgment must
be used
i
n
cases o
f
minor
or
questionab
le i
mperfectio
ns.
Chec
k all
parts to
the l
imits
speci
fied in
repair
and
re
build
standa
rds (par
.
1
56).
(fig.
72).
(1)
Lubricate a
ll ge
ars
and
bearin
gs with engine
oil.
(2) I
nstall the
drive imp
eller (K) an
d the
driven im
peller
(E)
in
the pump
housing
as
sembly
(F).
(3) Ins
tall
th
e sca
venger
o
il
pump hous
ing cover (D)
on
the
housi
ng,
locating it on
the
housi
ng dowel
s and
st
uds.
157
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Secure
wit
h slotted
n
uts, plain
washer
s, and
locking
wire.
(4)
I
nstall
pres
sure pump s
creen ass
embly H
)
over its
stud in
the
bottom
of the
housing.
Se
cure
with plain
washe
r and slo
tted
nut. Lock-w
ire
the nut
to the drill
ed
hole
in
the
flange
edge
at
bottom
of
the
housing.
(5
) Instal
l
bevel gear (A )
in
the housin
g c
over, m
eshing
the splin
es
with thos
e of the
imp
eller sha
ft.
S e c t i
o n XI. R E
B UILD
O F C O O
L ING
F A N AND
F A N C L U T
C H A S S E
M B L Y
76.
D i
s a s s e m b
ly o f
Co o l i n g
Fan and
F
an
Clu tc
h
A
s s e m b l y
(fig.
73)
a.
Remo
ve the fan
driv
e vertical
shaft c
over. Rem
ove the
c
ooling fan
and fan c
lutch assem
bly fr
om
the engine
par. 38
).
Separ
ate the
fan cl
utch as
sembly
from the
fan rotor
(
A )
by rem
oving
the cot
ter pi
n S),
slo
tted
nut (T),
p
lain wash
ers
(
BB) a
nd Y),
and drill
ed-for-c
otter-pin
b
olt
X) holdin
g t
he
clutc
h-to-roto
r
adap
ter B)
to the
web of the roto
r.
R
emove
the drilled
-for-cot
ter-pin
bolts AA
),
p
lain w
ashers
Y),
slotted
nut (T),
and
cotter
pins S) holding
the
rotor
adapter and
clutc
h
assembl
y
to
gether.
S
eparate
parts
fr
om
the
outer
upper
) clu
tch
ho
using
M).
Rem
ove externa
l s
nap ring
(P) f
rom the
up
per
end of the
c
lu tch drive
hub
(L) a
nd remov
e
th
e f
an clut
ch outer ho
using
(M) from
the
hub.
R
emove t
he
s
nap
rings from
the
clutch
outer hou
sing a
nd
push
out the
outer ball
bear
ing (N
).
/.
Remove
exte
rnal
snap ring
(J) fro
m
the
lower end of the
clu
tch
d
rive hu
b
and push
inne
r ball b
earing (K)
off
the h
ub.
77. C
leaning
In s
p e c t i o n
a
nd R e
p a i r
of Co
o l i n g Fa n
Clut
c h
(1)
C
lean all castin
gs and
mac
hined
pa
rts
with
dry-clea
ning
solvent
or vo
latile mine
ral
spirits.
(2 )
T
hese
bearing
s
ar
e the
seale
d
ty
pe an
d
mu
st
not
be
washed
in
dry-cleaning
solvent. They
are
packed
w
ith lubri
cant
sufficien
t for
t
he life
of
the
bearing
.
Wa
shing m
ay
pe
netrate the seal
and
remov
e lubri
ca
nt. W
ipe bear
ings c
lean,
u
sing
a cloth
moisten
ed
with
solvent.
1
58
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(1)
The fa
n rotor
should
be
inspected for cra
cks,
nicks,
and
scratches.
Use a
fine
mill
file to remove
raised
por
tions of me
tal
caused
by
nicks and scratches. A ny crack
or
bend
is cause
for rejection of the
rotor. D
o not
straighten
bent
blades.
(2)
Inspect rotor
adapter
for distortion.
See that
the
mountin
g
f
lange
is
flat and
free from raised
metal
or
dents and scratches. Th
e centeri
ng
pilot
of
the adapter
m
ust
be
without
n
icks
o
r
abrasions that
would interfere
with
a
neat fit
in
the
rotor.
(
3 ) Inspect
clu tch disk, press
ure plate,
and clutch
housings
for
imp
erfections
and signs
of failure. There
are
no
definite
limits established
for
th ese
parts
and
good
judgment
mu
st decide if parts
are
to
be replace
d.
(4) Ins
pect sealed ball bearings.
Spin bearing
s w
ith
fingers
and check
for audib
le
evid
ence of roughness
and wear.
Check bea
rings
for wear of
inner and outer rac
es by
supporting the
in
ner
race
in
a
vert
ical
pos
ition and tor-
siona
lly
check
ing
for end pl
ay
by os
cillating
the
o
uter
race. En
d play is evidence
of wear.
Note if seals
of
the bearings
are
damaged and
allowing
lubricant
to
escape
or
d
irt to enter
.
R ep
lace all worn
or rough
be
arings.
I
f bearings
are to
be
kept for an indefinite
period befor
e insta
llation,
the
y
mu
st be protected
by coating
with rust
-preventive
compound.
Lubri
cating oil is not adequa
te.
(5) Parts
s
hould
be checked to
the limits
specified in repa
ir
and rebuild
stan
dards (par. 157).
78.
A s s e m b ly
o f
C o o l i n g
Fan
and
Fan
Clutc h
A s s e m b ly
(fig.
73)
Inse
rt outer
bal
l
bearing (N) in
the
fan
ou
ter
(
upper)
clutch
housing
(M
), and secure w
ith snap
rings
o
n each side
of
t
he
bea
ring.
Positio
n inner
lo
wer)
fan
c
lutch housin
g ( C ) housing
spacer
(D), and clu
tch
d
riven disk
(F)
o
ver the clutch-t
o-rotor
adapter dowel pins
(Z).
Install 15 balls and 3 sp
rings in th
eir
recesses
in
the
fan
clutch
inner
hou
sing (l
ower).
L ay
clutch
pressu
re
plate
(
G) on the c
lutch springs (W)
with
its serrations
alined to m es
h with those of the clu tch
driven
disk (F)
.
Lay c
lutch
d
rive
di
sk (H)
on the clutch pr
essure plate
(G). Pus
h
c
lutch drive hub
(L ) thro
ugh the in
ner
ball
bear-
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I
N
C
H
E
R
P
D
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A
—ROTOR,
FAN 737600
3
B—ADAPTER
, CLUTCH-
TO-ROTOR 753 8 8 3 6
C—H
OUSING,
FAN CLUTC
H,
IN
NER (LOWER)
7376049
D—SP
ACER, H
OUSING 7414509
E—
BALL,
CLUTCH
5
87940
F—DISK,
DRIVEN,
CLUTCH
7539472
G—PLATE, PRESSURE,
CL
UTCH 7539470
H—DISK, DR
IVE, CLUTCH 7539466
J—RING,
SNAP,
EXT
ERNAL
7376045
K—BEARIN
G,
BALL,
INNER 7 12283
L—HU
B,
DRIVE,
C
LUTCH 7376048
M—HO
USING, CLU
TCH, OUTER (UPPE
R) 753947
1
N—BE
ARING, BALL,
OUTER 71 2071
P—R
ING,
SN
AP,
EX
TERNAL 583002
Q—COVER,
VERTICAL SHAFT
7538982
R—SCREW,
RD-HD
178469
S—
PIN, COTTER
1 2 1 2 2 3
T—NU
T,
SLTD
225 86
9
U—WASH
ER,
P
LAIN AIR-AN
-960-516L
V
—RING, SNAP,
OUTER HO
USING 7414962
W—
SPRING, C
LUTCH 7414508
X—BOLT,
DLD
-F/C-PIN 73 76704
Y—W
ASHER, PLAIN
50224
5
Z—PIN, DOWEL
CO-520493
A
A—BOLT,
DLD-F/C-PIN 583756
BB
—WASHER, PLAIN
7744766
Co
ntinued
ing (K
) and
install
external
snap
r
ing
(J
). Mesh
the serrations
of
the hub
with
th
ose of the
clutch dr
ive disk
(
H).
Install fan outer (upper)
clutch
housing
(M)
over
the
clutch
drive hub
(L). G
ently
com
press the as
sembly
until
t
he outer
housin
g engages the
clutch-to-r
otor
adapte
r dowe
l
p
in (Z). Keep
the
assembly comp
ressed unti
l it
is secur
ed to th
e
clu
tch-to-rotor
adapter
with
dri
lled
bolts, plain washers, slotte
d nuts,
and cott
er
pins.
Install
bolts
from
the adapter side
.
Install
e
xternal snap ring
(P)
over the clutch drive
hub.
/.
Install the fan
clutch
and
adapter
assembly
on
the
upper
side of
the
fan
rotor
( A )
(the
sharp
edges of
rotor
blades
are
on
the
upper side of
the rotor)
. Secure the
adapter to the rotor
w
ith drilled-for-co
tter-pin bolts,
installed f
rom the upper side,
plain
washers, slot
ted nuts
,
and
co
tter pins.
Install cooling fan
and fan clutch
assembl
y
to
engine and
install the
fan
drive vertical sh
aft cover
(par. 1 2
4).
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Sec t i
o n
XII
.
REB
UILD
OF TH
ROTTLE L IN K
A G E
79.
D i s as s e
m b l y o f
Th ro t t l e L i n k a g e
Ordinarily,
complete
disassem bly of
t
he throttle
controls
is
not
necessary
at
overhaul.
However,
a
thorough'
visual i
nspection should
be made o
f
th
e entire assembly
while
disassem
bling from the e
ngine (par.
43). If a
ny
defects
are
fo
und, the li
nkage may be
disassembled a
s outlined
below.
Disas
sembly of the
throttl
e
linkage from
the engine necessi
tates breakin
g
th
e comple
te throttle linka
ge
assemb
ly into three
separate subasse
mblies.
For rebu
ild
pur
poses
t
hese w
ill
be hand
led as three sep
arate unit,
to be re
ferred to as
the
cross
shaft
assembly
(fig.
75),
governor linkage
(fig.
74),
and
th
e vehicle
controls-to-
governor linkage
(fig. 76).
(fig.
76).
(1
)
Rem
ove
th
e go
vernor
c
ontrol-shaft-to-
vehicle-lever rod
(R) from th
e inner vehi
cle-to-carbureto
r lever as
sem
bl
y
(E)
as outlined in
below. Remo
ve
lever sp
ring
(S) from the
leve
rs.
(2)
Remove
the external
snap
ring
(A )
from
the shaft
end
of the co
ntrol levers support
(H
).
(3) Remove the
outer vehicle
control lever assem
bly (C
)
from
th
e shaft of the
control levers support
(H).
Using
a soft
hammer, tap two ball beari
ngs (B)
from the oute
r
vehic
le control lever assem
bly
(C
).
(4) Remo
ve
bearing
spacer
(T) and the inner
vehicle-to-
carburetor lever
assembly
(E) from the
shaft of the
control
levers
support
(H).
(5 )
Remove the two rema
ining ball
bearings (B),
by
tap
ping with a
soft
hammer. Remove
th
e snap
ring (D)
from
the le
ver.
(1) Remove the cr
oss shaft-to-c
arburetor control
rod assem
b
lies
fr
om the le
ft and right
cross shaft lev
ers (A,
fig.
75), by re
moving
co
tter
pins (B), slotted nuts
(C), and
plain
washers (D),
and
withdrawing
the
drilled
hex-
head bolts (K). D
isassem ble the
control rod assem
blies
by
removing the left-
and right-han
d thread
rod-end
ball bearings
(J) and
(E) and
right- and left-h
and
threa
d
hex-
jam nuts (F)
and (H) fro
m the cross-
shaft-
to-carburetor-
control-rod turn
buckles (G).
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(2) R e m o v e
cotter pin
(B),
slotted
nut
(C), dril led
hex-
head bolt
(S),
and plain
washer
(T) from
the left c ross
shaft
lever (A,
fig.
75).
R e m o v e the
lever from the
c ros s
shaft (P). If
necessary,
use
a soft hammer.
(3)
R e m o v e
W oo dru f f key
(N)
and
the
left
c ros s
shaft
sup
port bracket (M, fig. 75)
from
the
cross
shaft
(P).
(4)
Remove internal
snap
rings
(L)
and ball bearing (R)
from the left c ross shaft support bracket
(M).
If n e c
essary, use a soft hammer to
tap
the bearing ou t .
(5) In
a
similar manner
remove lever ,
key, bracket, and
bearing
from the other end o f the shaft.
(6) R e m o v e
the
remaining
c ross
shaft inner lever and
bracket
by
the
s ame
method
as (2)
and
(4)
above.
(fig. 74).
(1) R e m o v e the c ros s shaft-to-control shaft rod (X) from
the control-shaft-to-vehicle
lever (A).
R e m o v e
the
right- and left-hand
thread
control-shaft-to-governor
rod
(N,
fig. 74)
from the control-shaft-to-governor lever
(K) as outlined
in d(l)
above.
(2)
R e m o v e
the
control-shaft-to-governor lever (K) from
the
governor control
shaft (F)
by
removing
cotter
pin,
slotted
nut
and bolt holding it to
the
shaft. If
neces
sary,
use
a
soft hammer to remove lever from the
shaft.
R e m o v e W o o d ru f f key (G) from the con t ro l shaft.
(3) R e m o v e
external
snap ring (B) from the control shaft.
Using a soft
hammer,
tap
the end o f the shaft
and
the
governor control-shaft-to-vehicle
lever (A) from the
con t ro l
shaft support
bracket (E).
(4) R e m o v e the outer internal
snap
rings (C) from the
con t ro l
shaft support
bracket and
remove
ball
bearings
(D).
80. Clean ing Inspect ion
and
Repa i r
o f Thro t t l e
L i n k a g e
(1) Using
a
c lo th dampened with dry-cleaning solvent or
volatile mineral spirits, wipe dirt and foreign matter
from the
external
surface
o f
all sealed
bearings.
Never
put a
sealed bearing in
cleaning
so lven t , as the
cleaning solvent
may
penetrate the
seal and destroy
the lubri
cating material within the bearing.
(2) Clean all remaining parts in dry-cleaning
so lven t or
volatile mineral spirits.
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A—LEVER, CONTROL-SHAFT-TO-VEHIC
LE 7376043
B—RING,
SNAP 583037
C—
RING, SNAP 775 2 3 6 8
D—BEARING, BALL
700063
E—BRACK
ET,
SUPPORT,
CONTROL
SHAF
T 7414528
F—SHAFT,
CONTROL, GOVERNOR 7403372
G—KEY,
WOODRUFF
103905
H—PIN, COTTER 1 2 1 2 2 3
J—NUT, SLTD
7 4 0 3 2 1 3
K—LEVER, CONT
ROL-SHAFT-TO-GOVERNOR 7376
04 6
L—B
EARING,
BALL, ROD
END, RH-TH
D
712015
M—NUT, JAM, HEX,
RH-THD 219706
N—ROD,
CONTROL
-SHAFT-TO-GOVERNOR, RH-LH-THD
7403388
P—NUT,
JA
M, HEX, LH-T
HD
7 7 6 7 9 6 0
Q—BEARING,
BALL,
ROD
END, LH-TH
D
712016
R—BOLT
, DLD-F/C-PIN 7410037
S—NUT,
JAM
107822
T—NUT, PLAIN 2 2 5 8 5 3
U—WASHER, PLAIN 502245
V—NUT,
SLTD
2 2 5 8 6 9
W—WASHE
R, PLAIN
AIR-AN
-960-106
X—ROD
, CROSS-SHAFT-TO-CON
TROL-SHAFT 7403386
Y—BOLT,
DLD-F/C-PIN 7 3 4 6 6 9 7
Continued
(1) Magnaflux all st
eel parts if
this
m
ethod is
available.
If
not,
examine with
a
st
rong light for
cracks and deep
abrasions. Any
cracks are cause for rejection
of a
part.
(2) Hold bearings
by
inner
race and spi
n
the outer
race
to
detect any
undue
roughness
or sticking of bearings.
Roughness
or sticking of bearings
is
cause for rejection
of
the
part.
Replace defective
bearings.
(3) Use a fine
mill
file
to
remove
ra
ised metal
at
dents
or
scratches.
(4 )
Check
s
wivel joints
in rod-end
ball bea
rings. They must
rotate free
ly. R eplace
any
defective rod end
bea
rings.
(5) Bent ro
ds
and shafts
may
be stra
ightened.
Replace all
parts which can n
ot
be
reconditioned.
(6)
Check
all par
ts
to
the limits specified in
repair and
rebuild
standards
(par.
158).
81
A
s s e m b l y o f Th r o t t l e
L i n k a g e
(f
ig.
76).
(1)
Install snap
ring
(D)
in
gr
oove
of inner vehicle-to-ca
r-
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A—LEVER
, CROSS
SHAFT 7 3 7 6 0
42
B—PIN, COTTER 1
21223
C
—NUT, SLTD 7403213
D
—WASHER,
PLAIN 1 9 2 5 8 8
E—
BEARING, B
ALL, ROD
END, RH-THD
712013
F—NUT
,
JAM,
HEX, RH-THD 7767952
G—TURNBUC
KLE CROSS
-SHAFT-TO-CAR
BURETOR-CON
TROL-ROD
7403358
H—NUT, JAM, H
EX, L
H-THD
7767958
J—BEARIN
G, BALL ROD
END, LH-TH
D 7 1 2 0 1 4
K—BOLT, DLD
,
H
EX-HD
734
6697
L
—RING, SNAP
7752 36 8
M—BRACKET,
SUPPO
RT, CROSS SHA
FT 7403351
N—KEY, WOODRU
FF 103 9 0 5
P—SHAFT,
CROSS
740 3371
Q—BEA
RING, BALL,
ROD END,
RH-THD 7 12 0
1 5
R—BEARIN
G, BALL 70006 3
S—BOLT, DLD
, HEX
-HD
7410037
T—WASHE
R, PL
AIN 502245
U—RING,
SNAP 583037
V—N
UT, JAM 107822
W—NUT,
PLAIN 225853
Continued
bure
tor
lever
assembly (E).
Insert two of
the four ball
bea
rings (B) in t
he
inner
le
ver. M a
ke certain
the
bear
ing
s are
ottomed against
the
snap ring an
d that the
outer
races of the
bearings do not
rotate w
ithin
the
lever b
ody.
(2)
Install
the
leve
r and bear
ing
ass
embly
on the shaft o
f
the
control lever
support
(H).
(3) Install
bearing
spac
er (T)
on the shaft of
th
e control
l
ever sup
port (H).
(4) Install
the
remaining snap
ring
s
(D ) and
two ball
bear
ings (B) in the
outer
vehicle control lever asse
mbly
(C).
Make
certain
the
bearings
are
bot
tomed
against
the
snap
rings
within the lever
and
that
the
outer races of
the
bearings do
not
rotate w
ithin
the l
ever
body.
(5)
Install the
lever and
bearing
assembly
on
the
shaft
of
the contro
l lever suppo
rt (H), keeping the
larger portion
of
t
he
bearing housing of
the
c
ontrol lever
toward the
outer end
of
t
he
shaft.
(6)
Adjust the outer veh
icle control le
ver assembly
(C) and
the i
nner
veh
icle-to-carbure
tor lever assem
bly
(E)
in
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I
A—RING,
SNAP
583037
B—BEARING, BALL 700063
C—LEVER, VEHICLE CONTROL, OUTER,
ASSY
7376065
D—RING,
SNAP
7752368
E—LEVER, VEHICLE-TO-CARBURETOR, INNER, ASSY 7376054
F—NUT, SLTD
225869
G—STOP, VEHICLE
CONTROL
LEVER
7375842
H—SUPPORT,
CONTROL LEVERS 7403370
J—BOLT, DLD-HEX-HD
7346697
I*—BEARING,
BALL, ROD END,
RH-THD
712015
L—NUT, JAM, HEX, RH-THD 219706
M—PIN, COTTER 121223
N—NUT,
SLTD 7403213
P—WASHER,
PLAIN
192588
Q—LEVER,
7376043 (SHOWN ON
FIG.
74)
R—ROD, CONITROL-SHAFT-TO-VEHICLE-LEVER 7403385
S—SPRING, LEVER 7376252
T—SPACER,
BEARING
7376137
such
a
position that the outer vehicle control lever en
gages
the
s top
o f the inner
vehicle-to-carburetor
lever,
which in turn
engage s the vehicle control
lever
s top
(G)
when l eve r s are actuated
by governor.
(7) Assemble the governor control-shaft-to-vehicle-lever
rod
(R)
by
installing
right-hand-thread
hex-jam nuts
(L)
and right-hand-thread rod-end ball
bearings
(K)
on
the
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rod.
Install the assembly on
the in
ner
vehicle
-to-car
buretor lever assembly
(E).
(8) I
nstall external sn
ap rin
g (A )
o
n t
he end of the
shaft
of the
control leve
r support (H).
Make certain all com
p
onents of
this
assem
bly
rotate
free
ly on t
he
shaf
t.
(fig.
74).
(1)
Install
tw
o snap
rings ( C ) and
ball bearings
(D)
in
the
control
shaft support
bracket (E).
M ake certain
the
beari
ngs are bottomed
against
t
he snap ri
ngs in the
brack
et,
and th
at the o
uter
races
of t
he
be
arings
do
not
rotate in the
bracket.
(2)
In
stall the rem
aining outer snap
rin
gs
( C )
in the control
shaft
support
bracket.
(3) I
nsert
t
he
governor
contro
l shaft (F) i
nto the bear
ings
of
th
e sup
port bracket.
See
t
hat the
shaft rotates
freely in
the bearings before going
ahead wit
h the
assembly
.
(4
)
Install
extern
al
sna
p ring (B)
on
the
governor
co
ntrol
shaft
(F). Inser
t
Woodruf
f keys (G)
in the shaft.
(5) I
nstall control
-shaft-to-govern
or
lever
(K) on one
end
of
the
control
shaft.
Secure
it
with
its
bolt,
plain nut,
an
d
j
am nut.
A s s emble the control
-shaft-to-vehicle
lever
(A ) to other en
d of the sh
aft.
(6)
A ssemb
le the
cross-shaft
-to-control
shaft
rod (X)
and
the righ
t-
and
left-h
and-thread control-shaft
-to-governor
rod
(N ,
fig
. 74
)
by
insta
lling
jam nuts and rod-e
nd ball
bearings on
the
rod.
Install
the rod ass
emblies
on
re
spective levers.
(fig.
75).
(1) Install ball
bearings (
R) in three
cross
shaft
sup
port
b
rackets (M).
M ake c
ertain the bea
rings do not
rotate
within the bracket
s.
(2 ) Install interna
l
sn
ap rings
(L ) in
the
suppo
rt brackets.
(3)
Insert
W
oodruff
key (N). In
stall inner cross
shaft
lever (A
).
S ecu
re in positio
n with plai
n
washer
(
T),
hex-head drilled
bolt (S), slotted
nut (C), and
cotter
pin
(B).
(4)
Slide
tw o
bracket
and
bearing
assemblies
on
the
cross
sh
aft, us
ing a soft
ham
mer
to tap ea
ch
into
position if
necessar
y. See that
the bracke
t rotates freely
around
the s
haft.
(5)
Install in
ternal snap
ring (U) on
the
cros
s sha
ft.
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6) Follo
w th
e
pr
ocedure
outlined
above
for
installi
ng
the
rem
aining
cross
shaft su
pport b
racket
and cro
ss s
haft
co
ntrol levers
on th
e cross sha
ft.
7
) A
ssembl
e
th
e cross
sh
aft-to-c
arbureto
r contro
l
rod a
s
sem
blies b
y
in
stalling
jam n
uts o
n ro
d-end
ball
b
earings
and
inserting bearings
in
their
turnbuckles.
Install
the
rod
asse
m blies
on
the end
levers.
The cro
ss shaft
assem
bly
ca
n
be as sem b
led to
the carbur
etor elbow
as
a
su
bassembl
y
par. 119)
.
Sec
t i o n
X
III
C L E A
N I N G IN S
PE C TIO
N AND
RE
PAIR
O F
INDIVIDUA
L
PARTS
82. Oil
Pr
essu r e C o
n t r o l Va
lve
( .
77)
1)
Remov
e
lo c
king wire f
rom
the val
ve cap
. Unscre
w the
cap from
the v
alve hou
sing. Care
should
be
exe
rc ised
to
preve
nt
the va
lve spring
from
popp
ing the cap out
as
threads are
disengaged. Discard
the
cap
gasket.
Pull
t
he
s
pring a
nd its se
at from
the
housin
g.
2)
Unscrew
the
valve seat f
rom
the hou
sing
and rem
ove
the c
ontrol
val
ve.
Clean all
parts in
d
ry-clea
ning solve
nt
or vo
latile
mineral
s
pirits.
Inspect
the
c
ompone
nts for
thread
dama
ge,
flaws,
and
abrasio
ns. Chec
k to the
limits
specif
ied in rep
air and
rebuild
standards par.
159).
Make
certain
that
the
spring
seat
oper
ates freely
in
the v
alve housi
ng and, tha
t
al
l
o
il
passa
ges
in the ho
using are
free
of dirt a
nd s
ludge. Co
mpress
the
spring
and
note
any
wea
kness.
Thi
s
valve is
service
d as a co
mplete uni
t
a
nd a
ny
defec
tive par
t will nec
essitate
rep
laceme
nt of
t
he entire
uni
t.
1) Inser
t the con
trol v
alve i
n the va
lve hou
sing and
in
stall
the
valve
seat.
Tighten
securely
by
holding
the
ho
using i
n a vise f
itted w
ith soft
jaws.
2) Plac
e the sp
ring seat
in large
e
nd of the hous
ing,
in
ser
t
the
valv
e sprin
g
an
d in
stall the
v
alve
cap with
a
new cap
gaske
t.
P
ress the
cap in
to place
until t
he
th
reads s
tart to
eng
age.
Sec
ure the
cap to the
hous
ing
17
0
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S
E
A
T
V
A
L
E
7
V
A
L
E
C
O
N
T
R
O
L
7
H
O
U
S
I
N
G
V
A
L
E
7
G
A
S
K
E
T
S
E
A
T
S
N
-
A
N
N
U
L
R
7
S
P
R
I
N
G
V
V
5
7
C
A
P
V
A
L
E
-
7
R
A
P
D
1
S
P
R
I
N
G
V
A
L
V
E
-
7
H
N
V
A
L
V
E
7
V
A
L
V
E
B
Y
-
P
A
S
S
7
G
A
S
K
E
T
A
N
N
U
L
A
R
C
A
P
V
A
L
V
E
1
7
R
I
N
G
S
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with locking wire.
Adjustment of this
valve
is us
ually
made at engine test. It is
set
for 60 to
70 psi using
SA E
50
oil at 18
0°
F, by
adding plain wa
shers
7372030
in the housing cap
over the valve spring.
If the desired
pres
sure
ra
nge cannot be reached, it is p
robably be
cause
the
spring
is
defective.
However,
loose
main
bearings
or connecting rod bearings
may be t
he
cau
se
of low oil pressu
re.
If so, they sh
ould be replaced.
If
there
is
a question as t
o the reliability of
the
oil gage,
install
a
ma
ster
gage
in the line and check
new readings.
83. Oil
F i l te r By-Pass Valve
(fig. 78 )
R emove
locking wire
and
unscrew
the
valve
cap fro
m the valve housing.
Discard
t
he cap gasket. Compress
the by-pass valve on
the valve spring until the snap ring
is ex
posed and can be
removed from the
va
lve stem.
Clea
n
al
l p
arts
in dry-cleaning
solvent or volatile
miner
al spirits.
Inspect
the components
for
thread
damage,
flaws, and
abrasions.
Che
ck to the limits specified
in
repair
and
rebuild standards (pa
r. 160). M ake certain
that the valve stem
is
free in th
e
va
lve housing and that the valve
spring
is
n
ot
w ea
k.
This valve is serviced
as a complete unit and any
defective part will necessitat
e replacement of the entire unit.
Place the
valve spring on
the
valve housing.
Insert
the
by-p
ass
valve,
and comp
ress
valve a
nd
sp
ring until the
snap
ri
ng can
be installed on the valve st
em at the valve cap
end.
In
stall the
cap
and a new cap gas
ket.
Secur
e the cap to
the
housing
with
locking
wire.
The
oil
filter by-pass
valve
re
quires no
adjustment.
84. Oil C o o l e r Pre ssu re B y
-Pas s
Valve
(fig. 79 )
Remove
locking wire
a
nd unscrew the
valve
cap
from the valve housing.
Discard the
ca
p gasket. Compress
the by-pass
valve
on
the
valve
spring
until the
end
of
the
valve
stem is exposed and
the snap
ring
can be removed
. Remove snap
ring spring and va
lve.
Clean all parts in dry-cleaning
solvent or volatile
m
ineral spirits.
Inspect
the components for thread damage,
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A
:
C
V
V
A
A
7
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flaws
,
and
ab
rasio
ns. C
heck to th
e lim
its
spec
ified
in
repai
r an
d
rebu
ild sta
ndard
s pa
r.
16
1). M ake
certa
in th
at th
e valve
ste
m
is fr
ee in
t
he
v
alv e ho
using
and that
the val
ve
spr
ing is not
we
ak.
Th
is
valve
is
servi
ced as
a com
plete
unit
a
nd
any
de
fectiv
e pa
rt
wi
ll n
eces
sitate re
place
ment
of
th
e
e
ntire
un
it.
Clamp
the
valve
housing in a
vise
fitted
with
s
oft
jaws.
Pla
ce
the
v
alve
spring
on the v
alve
h
ousin
g. Inse
rt
th
e by-p
ass
valve
in
the
housi
ng and
com
pres
s val
ve and
spri
ng
un
til
the
snap rin
g
ca
n
be
inse
rted
on
the end
of th
e val
ve
ste
m
at
the
hou
sing
cap
en
d.
Inst
all th
e sna
p rin
g valve
c
ap an
d
a
new cap
ga
sket.
Secu
re th
e
cap
to
h
ousin
g w
ith
lock
ing wi
re.
Th
e o
il coole
r
b
y-pas
s
va
lve re
quire
s no
ad
justm
ent.
85
Oil
Coo ler
Therm o s taJ i c
B y Pass
Valve
Assem b ly
W,
fig. 86
)
Th
is va
lv e i
s f
actory
adjus
ted
to
cont
rol oil flow
at
185
°
F.
t
ope
ns to
by
-pass
oil at
a
di
fferen
tial
of 60
psi.
The v
alve can
no
t b
e dis
assem
ble d
an
d
cle an
ed in
the
field
. f the
re
is d
oubt
as to
the rel
iabili
ty o
f the
unit, i
nstall
a
ma
ster
tem
pera
ture in
di
c
ating
u
nit in
the
oil
line
and c
heck
the un
it.
t
is also po
ssibl
e
to check
the va
lv e
ope
ration
by pu
tting
the u
nit
in
a
hot
w
ater
bath and
slowly
bringing the
water
temperature
up
to
the
de
sired
poin
t.
f the
re is
n
o valve
trave
l,
t
he
un
it is de
fectiv
e an
d
m
ust be
rep
laced
.
86
Cra
nk cas
e Oil P
an a
nd A
ccess
o ry C
ase
Oil
Sump
fig . 80
)
f t
Eemo
ve the
lo c
king w
ire
fro
m the o
il pan
baffl
e stu
ds,
r
emov
e slotte
d nu
ts
E)
a
nd l
ift
out
th
e
o
il pan
b
affles
D
). Dis
card
the
baff
le-to-o
il pan
g
asket
C).
The
oil
pa
n drain
p
lug J)
and
the
su
mp magn
etic
dr
ain plug
R
)
for
t
he
a
ccess
ory
c
ase
sum
p
w
ere
rem
oved
at
eng
ine disa
ssemb
ly .
Wa
sh
the
sum
p, oil p
an, and
ba
ffle tho
roug
hly
with
dry
-clea
ning solv
ent
or
vola
tile min
eral
spir
its.
1) Exa
mine
the
oil p
an and
s
ump f
or crack
s wi
th t
he ai
d
o
f a s
trong
li
ght
or o
ther
ava
ila ble
m
ethod
.
Any cra ck
s
are
cause
for
rejection.
Small
cracks
will
probably
lead
to l
arger
one
s durin
g
s
ubseq
uent
op
erati
on of
the eng
ine.
2) Exam
ine
the fl
ange
surf
aces f
or any
dam
age cau
sed
by
ca
reless
ha
ndlin
g.
Look
for
disco
lorati
on of
the finis
hed
surfa
ces
as ev
idenc
e of
oil lea
kage.
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(3)
Inspect th
e threads of t
he drain
plugs and
dra
in
plu
g
openings for torn
o
r damaged
threads which m
ay
allo
w
oil leakag
e.
(4)
Inspect t
he baffles for warpage
and cracks.
R eplace
defe
ctive
ba
ffles.
(5)
Inspe
ct
all
studs.
Mark
for
repla
cement all loose
or
be
nt
studs,
or studs
with
d
amaged
thread
s.
(6
) Inspec
t Rosan
inserts. L
ook for pulled insert
s
an
d dam
aged
threads.
(1) R eplac
e
loose or defectiv
e studs (par
. 57) .
(2)
Use
a
fin
e mill file or
an
oi
l sto ne to remove an
y raised
metal at
dent
s or scratches.
(3)
R eplace
defective Rosan
inserts (par
.
57).
(fig.
80). Install oil
pan baffle (D)
on the oil pan,
using
a new baffle-to
-o il pan gasket
(C). S e
cure with slotted nu
ts
(E) a
nd lo cking wire.
Install
the
o
il pan and the
accessory case
oil sump magne
tic
drain plug (R) and
pan dra
in
plug
(J), using
new pan
drain plug
annular gas
ket (H) and sump
drain
plug
annular
gas
ket (Q).
87.
F lyw hee l G r o u p
(f
ig .
24)
See
paragraph
53 for removal and
disas
sembly
of
the
flywheel.
Clean
all p
arts
with
dry-cl
eaning solvent or vola
tile
mineral
spirits.
(1)
Inspect
the
to
rsion damp
er fricti
on
disks
(F
),
dam
per
pressure plate
(E),
and
damper spa
cer plate (J) f
or
imperfections
or signs o
f failure. T
here are n
o
definite
limits established
fo
r these
parts and
good jud
gment
must decid
e i
f
parts
are to be replaced.
Examine
the
torsio
n
damper
ring (D).
Replace
the ring if cracks
are evident
or
if a
perm
anent set or
distortion
is
noticed.
Examine the
damper hub (B
)
for
worn or
damaged
splines. Rep
lace the hub
if such defects
are
noted.
Examine
the
flywheel
cover
plate (C),
damper
spring driven p
late
(G
), and damper
hub plat
e
(H) for
we
ar
or
damage
which m
ay lead
to a
fut
ure failu
re.
(2)
I
nspect drive
springs (M ) for cracks and
breaks
.
When
these
springs are
assembled with their seats
, they
sh
ould
fit
snugly
in the flywheel
recesses. A ny
looseness
is
an
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PD
55
95
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indication of
de
fective sprin
g.
Replace
loos
e
spring
s
a
nd
test
other springs
to th
e
li
mits
specif
ied
in
repair
and rebuild
standa
rds
(par.
162) .
(3) Chec
k
the
fit of
the cran
kshaft-to-fly
w h
eel
dowel pins
in
the
holes of
the
flywheel
hub
to
th
e
limits specified
in
repair
and rebuild
standards (par.
162).
Replace
them
if any looseness
is
evident or
if the in
spection of
the
crankshaft
indicates
the
need
for o
versize
dowel
pins
.
Exa
mine
the
flyw heel
f
or any wear or damage
which may lead
to
a
failur
e.
88.
F
lywhee Repair
(1)
D owel
pins
are
secured in
the
crankshaft
flange
by
small
hex-socket set
screws (A M , fig
.
65
) in th
e
oute
r
surface of
cranksh
aft flange.
L oosen
these set screw
s
and extract
the
dowel
pins.
(2
)
T
w o sizes of
dowel pins
are stocked
fo
r replaceme
nt.
Fi
xture set
41-F-2
997-185 (fig .
8)
is
provided for
dowel pin
replacement.
(1)
Pilot
the
reaming
fixture
in
the
flywheel
and bolt
it
in
place.
With
the
s
pecial double-
end ream
er, ream
the
flyw
heel holes
for
the
dowel p
in selected.
(2)
With same
fixture
and re
amer, repeat
the
rea
ming oper
ation on
the
cranksha
ft fla
nge.
(3)
D rive new dowel
pi
ns
in
the
c
rankshaft
flange
until
the grooves
in the pins lin
e
up
exactl
y with the set
scre
w
holes. Tigh
ten
the
set screw
s.
89.
Valve Ro
ckers
(fig. 81)
Clean a
ssembled
parts by w
ashing
in
dry-cleaning
so
lvent or volatil
e mineral
spirits.
(1)
See
that the
ad
justing
screws turn freely.
Insp
ect the
assembly for
cracks
. Inspect th
e valve
rocke
r bearings.
If they
are
loo
se or damage
d, replace
the entire v
alve
rocker a
ssembly. See
that the valv
e rocker
ro
ller turns
freely and is
free of scuff
or score ma
rks. Replace
the
a
ssembly for
any of
these
reasons
.
See that th
e oil
tube passage is
clear
in each valve rocke
r.
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(2
) Check assemblies
to
limits
spec
ified in repair
and r
e
build st
andards (par.
1
63).
Only clearance
dim
ensions
can be checked.
The valve ro
cker rol
ler and roller hu
b
clearance can be
check
ed
by mou
nting a dial
indicator
against
the
ro
ller with
the entire ass
embly
posit
ioned
securely.
M ove
the roller to the extre
mes o
f
its trave
l.
Total
ind
icator reading
is
the
clearance.
(1) Po
lish minor
scr
atches
and scores
from
the valve rocker
shafts (S, fig
.
60
) with crocus clo
th. R
eplace
shaft
s
with lo
ose oil
tu
bes or heav
y scoring.
(2 ) If t
he adjusting
screw does
not
turn
free
ly, clean up
any damag
ed threads. R
eplace the screw
if thre
ads can
not
be
cleaned
up.
Defects
in
the
valve
rocker
assem
bly
are not repa
irable. R
eplace
any de
fective
assembli
es.
9
0. Ign i t i o n Harn
es s
C l
ean the ign
ition harness wit
h a
cloth
dampened with
a
m
ild soap
a
nd water.
Pay par
ticular atte
ntion to the
spark cable
ins
ulators and
conta
cts.
A
SSY
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Caution
Never use so lven t
o n
electrical parts, as
it
decom
poses
rubber.
Inspect
all
harness
cables
and
con n e c t i o n s for looseness ,
burned
or damaged cond i t ion , and frayed
insulation
or
shield
ing.
Repair any
defects or replace
the
defect ive part.
c.
Check
all cables
for
electrical continuity.
With
a
high
ten
s i on ignition
tester, test
leads
for electrical
leakage. Replace
any defect ive cables .
91. In take
Manifold
(fig.
106)
Each manifold consists of three castings
which are attached to the cylinders, a
connector which
is attached
to
the
supercharger
hous ing ,
and manifold
balance
tube fittings
which are connec t ed by
the balance
tube extending
through the
crankcase. Air aspirators are attached to the s ides
o f
No. 1 and
No. 2
cylinder
manifold sec t ions , and are connec t ed by l ines to
the
carburetors and the
carburetor elbow.
All manifold s e c t i on s
are joined together with short hose c o n ne c t io n s and secured
with
clamps. Loosen the
c lamps and
separate
and
r emove the s e c t i on s .
Wash metal
parts
with dry-cleaning so lven t or
volati le
mineral
spirits.
S e e
that
carbon
deposits
are
removed
from inner surfaces. Clean hose con n e c t i o n s
with
water.
Dis
card
hard or unserviceable hoses .
(1) Inspect the
intake manifold castings
for cracks
and
f laws.
Replace
unserviceable parts.
Check
for
n icks and
burrs o n the
machined
surface
which
mates with
cyl
inder
mounting pad. Check to see
if
faces
are
flat, not
warped, and
that
there are
n o
signs
o f leakage
at the
gaskets. Examine the
intake manifold
balance
tube
f langes (L) for cracks and defec t s .
(2) Inspect R o s a n
inserts
in castings and replace any which
are defect ive (par. 57).
(3)
Disassemble and
inspect the ori f ice
o f
the air aspirator
assembly
(GG). The
body must be free
o f
dirt.
(4) Hose
clamps should
be examined and damaged
c lamps
replaced.
(5) Inspect
pipe
plugs and threaded
open ings for
damage
o r any
s ign s o f
leakage.
(1) Install pipe plugs in manifold sec t i o n s for No. 1, 2, and
6 cyl inders .
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(2)
Assemble right (1-3-5) side an
d left (2-4-6) side mani
fold
sections.
Use n
ew
manifold
section
hoses
(D ) and
new
or
serviceable hose cla
mps. Tighten
c
lamps
only
enough
to keep sections
from turning
in the hoses.
92. Cyl inder
ead Oil Drain
Manifold
(fig. 107)
Each
m
anifold consists o
f three individually
cast
sections
an
d
two
oil
drain
line
a
ssemblies. All
sections
ex
cept
the
e
nd
ones
at cylinders
No. 5 and
6
manifold
sections
(B)
and (P)
are identical
and are interchangeable on the
engine.
Each line assembly is
different and must
be
returned
to its
ori
ginal position
. All oil
drain
manifold section
bolts
(N)
which
hold
the
sections to
the
cylinder heads
are
alike.
All
oil
drain
ma
nifold section hoses (A)
and
hose
clamps
(L)
are
ali
ke. Loosen
the hose clamps a
nd separate sections.
Wash all
metal
parts
with
dr
y-cleaning
solvent
or
volatile mineral
spirits. See that all
carbon,
sludge,
and foreign
material
is removed f
rom inner
surfaces.
Th
e
hollow
bolts con
tain
drain holes whic
h must be thoroughly cleaned.
Use probes,
if
nec
essary, to remove
dirt
from
bolt
holes.
Clean hoses
with
water.
Replace
hard or unserv
iceable
hoses.
Inspect sections
and lines
for
cracks and flaws.
Replace unserviceable part
s. Inspect the
machined surfaces for
nicks and burrs.
Look for signs
of
leakage at the gaskets. R e
move
minor nicks and burrs wi
th
an
oil stone. Dress nicked
or
warped su
rfaces on a surfac
e
plate or
replace the manifold
s
ection. Examine
hose
clam
ps and replac
e
damaged
or unservice
able clamp
s.
93.
E x h a u s t
Manifold
Sect io n s
and
H o t
S p o t
Manifolds
(f i
g . 112)
The
exhaust manifold
sections are supplied as a
unit for
each
side
or
bank
of cylinders. A weld
ed
bellows
between
the sections allows for therm
al
exp
ansion and mo
vement of
indi
vidual
cylinders.
Wash parts in dry-cleaning
solven
t
or vo
latile
mineral sp
irits.
Inspect the mating
flanges
for flaws,
nicks, and
bu
rrs. Look for
signs
of war
page and leakage
at the flanges.
Inspect for cracks at flanges,
bellows, and a
t areas around
welded
joints
. Weld
mi
nor crack
s.
Remove minor
nicks and burrs. R e
plac
e
sec
tions wh
ich cannot
be r
epaired.
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94
Eng ine
Sh r
o u d an
Ro to r Ho u s i n g
and Cool ing
an
Out
le t Van
e Hou s ing
(fig
. 17)
a
The
shroud is fab
ricated as
a unit ex
cept
for
sma
ll
f
it-in
pieces
.
The
fan
rotor housin
g
is
fastene
d to
the shroud
and
need
not be disas
sembled un
less defectiv
e parts
are found.
6.
Clean al
l
p
arts with
dry-cleani
ng solvent or
vola
tile
mineral
spirits.
(1) Ins
pect
the shroud
,
fan
rotor housin
g, a
nd
fan
outlet
vane housin
g for crack
s,
warped o
r
ben
t pieces,
and for
dam
aged or
im
properly fitting p
ieces. Straig
hten, re
pair,
or replace
any warped
or
damaged
pieces.
The
rubb
er
s
eal of the
shroud
is
im
portant f
or prop
er engine
cooling
and mu
st be in
good conditi
on.
(2)
Chec
k
a
ll housing
studs
and
repl
ace an
y th
at
are miss
ing or
damag
ed.
C
heck
all
nu
ts th
at
are
welded
to the
shro
ud and re
place any
that
are
miss
ing. Ins
pect the
speed grip
reta
ining nuts
which
are
u
sed for
s
ecuring
th
e
co
vers at the
fly wheel
and accessory
ends of
the
shroud.
To remove
the nuts,
compress
the spring
clip
and p
ush
the
nuts thro
ugh
th
e
shro
ud holes. Instal
l the
nu
ts
in
the same
mann
er.
(3)
Check the separato
rs of
the
fan
ou
tlet vane housi
ng
to be
sure air flo
w
is
not
restricted.
95
Cool in g
an Dr iv e
(fig. 82)
(1
)
The fan
d
rive
vertic
al shaft
bearing housing
(F), oi
l
seal housin
g (K
),
and
vertica
l
fan
drive
shaft (C)
were
disasse
mbled as they w
ere
removed from
the
eng
ine
(par. 54).
(2) Rem
ove
th
e fa
n
drive
vertical
sh
aft
ball
bearing
(G )
from t
he bearing h
ousing.
Clean
all
p
arts in
dry-clean
ing solve
nt
o
r
vola
tile mineral
spirits.
Use
probes
if
necessary
to
clean
out
holes
in
the bearing housing
.
(1 )
Insp
ect t
he gears and
drive
s
hafts by magn
aflux or
any other suita
ble method
. Any
crack
s are
cause for
rej
ection of a
part. Ex
amine
the g
ears
f
or abrasio
ns
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A—BEARING,
VERTICAL S
HAFT 7351157
B — G E A R , B
EVEL,
V
ERTICAL SHAFT 7351158
C—SHAFT.
FAN
DRIVE
, VERTICA
L
7346599
D—SLINGER, OIL 7346506
E—GASKE
T, O
RING
546884
F—HOUSING,
VERTICAL SHAFT
BEARING
7346 53 9
G—BEARING, BALL,
VERTICAL SHAFT 7539700
H—GA
SKET,
O
RING
546878
J—SEAL,
OIL, VERTICAL SHAFT 7376044
K—HOUSING,
SEAL 7376051
L—WASHE
R, PLAIN
502245
M —
NUT,
SLTD
225869
N—PIN
, COTTER 137214
P—NUT, SLTD 7767728
Q — S CR E W ,
FL-HD
120697
R—RING
, SNAP 7725549
S—G E AR ,
BEVEL, HORIZONTAL SHAFT 7351190
T—BEARING,
FAN
DRIVE
HORIZONTAL
SHAFT
BEVEL
GEAR
7351189
U
—GASKET,
ANNULAR
7346727
V—
NIPPLE, HOSE 7346497
W — C L A
M P, HOSE
502
91 9
X—HOSE, H
ORIZONTAL SHAF
T
7403383
Y—SHAFT,
FAN
DRIVE, HORIZONTAL
7346 49 8
Continue
d
on tooth faces and
for buns on tooth
c
orners. Minor
defects
can
be correc
ted with an oil sto
ne.
(2) Carefully
check the condition
of
the
ball
bearing.
Spin
the
bearing outer race to detect any u
ndue roughness
or sti
cking. Roughness or
sticking is
cause for
replace
ment.
(3)
E
xamine the vertical
shaft and fan drive horizontal
shaft bevel gear bearings.
Note
condition
of
thrust
faces
at
contact
surface with
the
bevel
gears.
Discolored
surfaces a
re an indication
of insufficient lubrication.
Exami
ne
passages
in the crankcase
flange.
(
4) The brass
ho
usings
should be
checke
d for warpag
e
and
distortion. The
mating
faces
must be
free of nicks
and
burrs.
Minor defects can
be
removed
with
a
fine
mill
f
ile.
(5) The perman
ently
incl
osed fan drive ve
rtical shaft
oil
sea
l
(J) has a tight press
fit in its housing. Rem
oval
from
the housing
will
ruin the
seal. If
th
ere is
an
y
evidence of leakage, replace the
seal.
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(6) Check
all
parts
to the limi
ts specified in
repair
and
rebu
ild standard
s
(par.
164).
(1) Install
a new or
serviceable fa
n drive vertical
shaft ball
be
aring (G
)
in vertical
shaft bea
ring housi
ng
(F). In
sert
the
ver
tical fan driv
e shaft
(C) in the
b
earing
and
chec
k
the
freedom of rotation.
(2) If
the fan
drive
vertic
al
shaft oil seal
(J) shows
e
vi
dence of leak
age, press a new
oil seal in
seal housing
(E) with t
he
inne
r sprin
g loade
d retainer to the crank
-
ca
se
si
de of the hou
sing. M
ake
sur
e the
out
er
case is
se
ated properly in the recess
provid
ed in
th
e
top
of
t
he
housin
g.
(3)
See
paragraph
104
for fan
drive horizontal
shaft
as
semb
ly .
96.
Vent
and
F
u el L ines
(fig
s. 110 and
114)
Inspect
all
lin
es for leaks,
cracks, a
nd
gener
al deteri
oration.
Look
for frayed
spots
or
areas
which have
been damaged
by
being
in
contact
with
other
parts.
Examine
all line
connectors
a
nd
fittin
gs
for
damag
ed threads. Defective
or dam
aged
l
ines
must be re
placed to eliminate an
y possibility
of leakage.
Line
co
nnectors and fittin
gs whic
h
are
damaged shou
ld also be re
placed.
97. H o t s p
o t
Outlet H o u s
in g
and
V a c u u m
Heat Co
n t r o l
(1 ) Rem
ove vacuum
heat
con
trol line assembly (KK)
from
its union
el
bow
in t
he vacuum
heat
contro
l housing
(DD).
(2) Sepa
rate the
heat c
ontrol
hous
ing (DD)
from t
he
va
cuum
heat
contr
ol lever housing
(R)
by
removin
g th
e
eight
drilled
-fillister-head screw
s (HH) a
nd
flat
wash
ers.
Remove v
acuum
heat
co
ntrol
spring
(CC).
(3)
Remove
link
check
plain
nut
(B B)
from the
vacuum
he
at cont
rol
li
nk (V)
. Discard special l
ink check nut
tab was
her
(
AA)
which locks the heat
contro
l link^nut.
(4)
Remove the heat
control spring
lower seat (Y),
heat
contro
l .diaphra
gm
(Z )
and the
h
eat
control spring
up
per seat (Y) from
the contro
l
link.
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(5)
R emove
the vac
uum hea
t contro
l
link f
rom the
heat
co
n
trol
lever
(S)
by removing
cotter pin (
T) from the
vacuum
heat control
le
ver drilled
-fillister-head
pin (W).
Rem
ove plain
washer
(U).
R
emove control
lever fro
m
the vac
uum
heat contro
l
shaft lever
(M ) b y
driving out
heat
control
lever
countersunk-head
rivet
(X).
(6 ) R
emove the three
slotted nuts and
plain washers.
Sep
a
rate
the
va
cuum heat con
trol
leve
r
h
ousing
(R) from
the hotspot out
let hou
sing assemb
ly (F)
.
(7) Remove
the leve
r
housi
ng gaskets and
spacer from
hot-
spo
t o
utlet housing
studs. Discard t
he gaskets.
(1) Clean
all parts in
dry-clean
ing solvent
or
volat
ile mi
n
eral
spirits.
(2) Remove c
arbon depos
its
fro
m hotspot
control v
alv e
(B
)
with
wire
brush and scraper.
(1) Use a fin
e mill
fi
le
to
remove a
ny raised
metal on co
n
tact surfaces
.
(2 ) Ins
pect the
c
omponents
for damaged
thread
s,
fl
aws, and
abrasio
ns.
(3 )
Inspect the
con
dition
of
the
vacuum
heat
control
lever
shaft and
its bushing
-type bearings
for wear.
Replace
t
he
a
ssembly
if
parts
are
exce
ssively
worn. Replace
the vacuu
m
heat contr
ol
diap
hragm (Z).
(4)
Check all pa
rts
to
the limits
spec
ified
i
n repair
an
d
rebuild
standards (par. 165).
(1)
M ake certa
in that there is
free move
ment
an
d full
trav
el of
the
hotspot
contro
l
valve
(B)
in
the
hotsp
ot
outlet ho
using
as
sembly
(F).
(2)
Inst
all the vacuum
heat
control l
ever
housing gas
kets
(K
) and s
pacer
(L
) on hotspot outle
t h
ousing stu
ds.
(
3)
Install v
acuum
heat
con
trol lever
housing (R
) to hotspot
outlet
housing assembly
(
F) with thre
e
plain w
ashers
(N) and
thre
e slotted nuts (P). Secu
re
w
ith s
afety
wir
e.
(4) Install vacuum
h
eat control lev
er
(S)
on its shaft
(M),
using
a new
heat
control
lever
countersunk-head
rivet
(X).
(5)
Insta
ll the vacuum
heat control link (V) to
the heat
c
ontrol
lever
(S)
with vacuum
heat control lever
drill
ed-
fillister
-head p
in (W). Secure
w
ith plain
was
her (U)
and cotter pin
(T). Before
procee
ding
furth
er, check
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0
H
2
1
4
5
6
I
N
^
D
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A—PIN,
TAPER
ED, C O N T R O L VALVE 740
3375
B
— V A L V E ,
C O N T R O L ,
HOTS
POT 7410
40 0
C—GASKET,
O
UTLET
HOUSING 7375844
D—WASH
ER,
P
LAIN 502204
E—BO
LT, DLD-HEX-H
D
737670 5
F—HOU
SING, HOTSP
OT OUTLE
T, ASSY 7410401
G — S T U
D
74030
97
H—ST
UD 7403512
J—
STUD 7
403070
K—GASK
ET,
L
EVER HOUSING 7
375855
L—SPACE
R, LEVER
HOUSING 7375854
M
—SHAFT, LEVER
7375853
N—WASHER, PLA
IN 5022
45
P—
NUT, S L T
D 225869
Q—PL U G,
PIPE
7538990
R—HOUSIN
G,
H
EAT C
O N T R O L LEV
ER
73758
45
S—LE
VER, HEAT
C O N TR O
L
7403374
T—PIN, COT
TER 103
361
U—WAS
HER,
PLAIN AIR-AN-960-C51
6
V—LINK, HE
AT C O N T R O
L
7375851
W—PIN,
DLD-FL-HD,
LEVER 7410082
X—
RIVER, CK-HD
, HEAT
CONTROL LEVER 740337
6
Y—SEAT,
HEAT
C O N T R O L SPRING
, UPPER
A N D
LO
WER 737584
6
Z—DIAPHRAGM,
HEAT
C O N T R O L
7376254
AA—WASHER,
T A B , LINK CH
ECK NUT 74
10167
BB
—NUT, PLAIN,
CHECK
,
LI
NK 7414571
C
C—SPRING, HEAT
C O N T R O L 7410093
DD—HOUSIN
G,
HEAT
C O N T
R O L
74033
73
EE—
GASKET,
ANNULAR
119937
FF—BOLT,
STOP
,
LINK
7375852
G G — W A S H E
R , PLAIN 192
588
HH—SCREW,
DLD-F
IL-HEAD 5443 9
6
JJ—ELBOW, FLARED TUBE,
90
DEG
7767517
KK—
LINE,
HEAT
C O N T R O L ,
A
SSY 7376030
LL—ELBOW
,
FL
ARED T
UBE,
90 D
EG 7410039
Continued
freedom o
f
movement
a
nd
components
thus
far
assem
bled.
(6)
Install
the
heat
control
spring
upper seat (Y),
vacuum
he
at
contr
ol diap
hragm (Z),
heat control
spring lo w er
seat (Y)
, and
l
ink check
nut ta
b
w
asher (AA),
on the
contr
ol link in the
order
nam
ed. Secure these
com
p
onents w
ith the
vacuum heat control
link
chec
k
plain
nu
t (BB). S e
cure the nut
with the tab w
asher.
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(7) Install the vacuum
heat
control spring (CC) in the
va c uum heat control housing (DD). Attach this hous
ing to
the vacuum
heat
control lever
housing (R) with
eight drilled-fillister-head
s c r ew s
(HH) and
plain wash
ers (GG). S e c u r e
with
safety wire. Make sure that the
flat
spot
o n
the
outer diameter
of
the
v acu u m con t ro l
housing and
the
f lat spot
o n the outer
diameter o f
the vacuum control lever
housing
correspond. This wil l
locate
the vacuum
heat
control l ine 90° f lared tube e lbow
(JJ)
in the
vacuum control
housing in the proper posi
t ion .
Install the vacuum heat control
link
s top bo l t (FF)
and
a
n e w
annular gasket
(EE).
(8) Assemble the
vacuum heat control
l ine assembly. In
stall
e lbow
o n
heat
control
hous ing .
98.
Oil
Fue l
and Pr imer
Fil ters
a. (fig. 84).
(1 ) Remove the oil filter head
(E)
from the
center
filter element
tube
(A).
R e m o v e
the drilled-hex-
head bolt
(J) and
its
gasket. Discard the gasket. R e
m ov e e l emen t
nut
(C). R e m o v e the fil ter element tube
disks (B)
and
disk
spacers
(N).
(2)
Clean
the disks in dry-cleaning so lven t or
volat i le
mineral
spirits.
Use
compre s s ed
air to assist
in cleaning
deposits from disks . New
disks are
fur
nished to replace any disks which are
defect ive .
(3 ) Assemble the disks and spacers in order on
the tube and install the
filter
head. Secure with annular
gasket
(H),
drilled
hex-head bolt
(J), and safety wire.
6. (fig. 114) .
(1) Drain the
filter
body by o pen i ng the drain
cock in the
bottom o f
the hous ing .
Separate
the upper
and l owe r halves of
housing by loosen ing
the
%-inch
nut
o n
the top
o f
the hous ing .
(2) Clean all
parts
in dry-cleaning solvent o r
volat i le
mineral
spirits.
(3)
Install
the filter
core
in
the
l ow e r
half
o f
the hous ing . Install these c o m p o n e n t s to the upper half
of the hous ing , using new gaskets.
(fig. 108).
(1) Disassemble the primer filter assembly
by loosen ing the nut of the
filter
bail assembly (M) (5 )
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R
A
P
D
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and
se
parating
the filter head
M )
(1)
an
d
the filter
bowl ass
embly
(M) 4).
R
emove gas
ket and el
ement.
(2 )
Clean all parts
in
dry-cleani
ng
s
olvent or
volatil
e mineral
spi
rits.
(3)
Install the filter e
lement
M )
(3) in th
e
filter
head.
Install
the filter
bowl an
d bail t
o the h
ead,
usin
g a new gasket
.
99
C
arbure tor
Elb
ow
fig. 85
)
Remo
ve
air-met
ering
valve
asse
mbly T) and
90
degree
tube
elb
ow (
U, fi
g.
113).
L
eave al
l
other inspection
plugs,
elbows, etc .,
installed
in
the
carburetor
elbow,
unless
there
is
an indi
cation they
should be
rem
oved for add
itional insp
ec
ti
on and
cleaning.
1) Clea
n all e
xternal and
inter
nal surfaces
wit
h
dry-cl
ean
ing
solvent o
r volatile m
ineral
spirits.
(2)
Use
air
press
ure
h
ose to re
move loo
se
carbo
n
deposits
from
in
ternal surfa
ces of
hotspo
t
man
ifold
(1
) Inspect
the
c
omponents
for
thread dam
age, flaws, an
d
abr
asions. Loo
k for
casting
defects. F
lange faces
must
be
free of nicks
and b
urrs. Insp
ect a
ir-meterin
g
va
lve
for
signs of
sticking or da
maged plun
ger.
(2) Use a
fine
mill
f
ile to remove
any
raised metal
at de
nts
or scr
atches on
contac
t surfaces.
In
stall air-m
etering
valv e
assemb
ly T) and
90
°
tube
elbow U,
fig.
113).
100 Oi l
Coolers
and
L i ne
s
fig.
86)
(1)
R
emove
the oil cooler
screen
assembl
y
G)
and sc
reen
su
pport assemb
ly
F) from
oil
coole
r assembly
D,
fig. 87
).
(2)
Remove
transmission
cooler
inlet
and
outlet
line
assem
b
lies
C
an
d D) and
engine
cooler ou
tlet and inle
t line
a
ssemblies F
and J),
tra
nsmission cooler
inlet
and
c
ontrol
housing ou
tlet conn
ector
B), transmiss
ion
co
oler and engi
ne cooler
ou
tlet connector G
), and
en
gine
cooler
inlet conn
ector H).
Discard
gaskets
.
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3
)
R
em
o
ve
oil
c
oo
le
r
t
he
rm
o
s
tat
ic
by
-p
as
s
va
lv
e
as
se
m
bly
W
)
f
ro
m
t
he
by
-p
as
s v
a
lve
h
o
us
in
g
(X
).
R
em
o
ve
t
he
h
ou
si
ng
fr
om
t
he
o
il
co
o
ler
.
4)
Remove
oil
coolers
from
the
eng ine
shroud
by remov
in
g
th
e
fo
ur
ja
m
nu
ts
(
P
, f
ig
.
86
)
an
d
fo
ur
d
ri
lle
d
-h
ex
-
h
ea
d
b
ol
ts
N
,
fig
. 87
).
5
)
D
is
c
ard
al
l
g
as
ke
ts
.
1)
C
le
an
all
p
ar
ts
in
dr
y-
cl
ea
ni
ng
s
olv
e
nt
o
r v
ol
ati
le
m
in
e
ra
l
s
pi
rit
s.
1
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A—COOLER,
OIL, ASSY 73
76040
B—CONNEC
TOR,
T
RANSMISSION
COOLER
INL
ET
AND CONTRO
L
HOUSING O
UT
LET 7376009
C—LINE,
INL
ET,
TRANSMISSION
COOLER, AS
SY
73 76839
D—LINE, OUTLET,
TRANSMISSION C
OOLER, ASSY 7410080
E—ELBOW
, TRANSMISSION 7410081
F—LI
NE, OUTLET, ENGINE
COOLER, ASSY 7376127
G—CONNECTOR,
OUTLET, TRANSMISSION
COOLER
AND
ENGINE
COOLER
73 76012
H—CON
NECTOR,
INLET,
ENGINE
COOLER 7376013
J—
LINE,
IN
LET, ENGINE
COOLER,
ASSY
73 7
5861
K—NU
T, BALL SLEEVE,
COMPRESSION T
UBE FITTING 7372660
L—SLEEVE, BALL, C
OMPRESSION TUBE
FITTING
1934B7
M—NUT, PLAIN
225854
N—
CONNECTOR,
INLE
T, OIL
CONTRO
L
HOUSING
7346
635
P—NUT,
JAM 107823
Q—WASHER, PLAIN 50220
4
R—BOLT,
DLD-HEX-HD 7376759
S—BOLT, D
LD-HEX-HD 73467
18
T—GASKET, C
ONNECTOR 7346579
TJ—GASKET,
BY-PASS
VALVE
HOUSING
7375878
V—GASKE
T, ANNULA
R, BY-PASS
VA
LVE
7403580
W
—VALVE, BY-PAS
S,
THERM
OSTATIC, ASS
Y
7346573
X—HOUSING,
BY-PASS
V
ALVE 737587
7
Y—BO
LT, DLD-HEX-HD 73 4
6713
Z—
WASHER,
PLAIN
502245
AA—BOLT,
DLD-HEX-HD 7346710
—
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(2 ) Clean
the lines,
elbows,
and co
olers internall
y b
y flush
ing
w
ith
dry-cleani
ng so
lvent or
vo
latile
minera
l spirits.
(3
) Use
stiff
br
ush (
bristle)
and pressure
air to r
emove dirt
an
d foreign ma
tter from
external
surfaces
of oil
cooler
radiators
.
(4 )
Refe
r
to
para
graph
85
for
serv
icing
of
oil
cooler
by-pass
valve
(thermo
static).
(1 ) Use
a fine
mill file to remo
ve an
y raised
metal
at
den
ts
or scr
atches on
gasket contact
s
urfaces.
(2
) Inspect
woven s
hielding
of oil lines
and
discard if
there
is any
evid
ence
of
br
eaks
or abrasi
ons.
(3)
With the
aid of a
strong
light, or
better
method
if
avail
able
, ch
eck
for
cracks
in
t
he oil cooler
by-pass
valve,
v
alve housing,
and all connector
s. Any
crack
s
are
cause
for
rejecti
on.
(
4)
Seal op
enings
of
o
il coole
rs
and
apply
int
ernal a
ir pres
sure (n
ot
to
exc
eed 60 ps
i). Put in
clear w
ater a
nd
exa
mine for
leaks.
Replace leaky
coolers.
Leaky oil cool
ers cann
ot
be
sol
dered as hot oil
unde
r
pressure
will
dissolve
solder
and
force
it
out.
(
5) See para
graph 57 for
replacem
ent
of studs
and
Rosan
inserts.
(
1) Assem
ble oil cooler
by-pass
valve housin
g
t
o
o
il coo
ler.
Use new ho
using ga
sket. Use
pla
in
w
ashers (Z)
and
drilled-he
x-head
bolts (Y)
and
(
AA). Secur
e with
safe
ty w ire.
(2)
A ssem
ble transmis
sion
a
nd engin
e
coole
r outlet con
n
ector
(G) and tran
smission
co
oler inlet
and control
housin
g
o
utlet connec
tor
(B) to the tra
nsmission
o
il
cooler
assemb
ly
(A). Use a
new c
onnector gas
ket (T
).
Use
plain wash
ers an
d drilled-he
x-head
bolt
s
and se
cure
wit
h safety
wire.
(3)
Assembl
e
engine
cooler
in
let connector (H
) an
d trans
mission
and
engine
cooler
outlet
connector
(G) to
the
engine
oil cooler. U
se a
new conne
ctor gasket
(T),
plain
wa
shers, a
nd dr
illed-hex-h
ead
bolts
. Secure
with safet
y
w i
re.
(4) A
ssemble oil c
ooler thermosta
tic
by-pass
valve as
sembly
(W) in oil
cooler by-pass
valve housin
g
(X).
Use a
193
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new
by-pas
s
valve housi
ng
gasket
(
U)
and
securewith
safety
wire.
(5) Ass
emble
the oil
coolers to the engine shroud assemb
ly,
using
plain washers, plain nuts, and
jam
nuts
on the
upper
studs. Use plain
washers and drilled-hex-head
bolts
and
secure
with safety
wire
at
the
bottom mount
ing holes.
A—SHROUD,
MAIN,
ENGINE,
ASSY
73 7586 8
B—NUT, JAM
107823
C—NUT,
PLAIN 2 2 5854
D—C
OOLER,
OIL,
ASSY
7376040
E—STUD
F—SUPPORT, SCREEN,
ASSY 7403 3 66
G—SCREEN,
COOLER, ASSY
7376041
H
—WASHER, LOCK 13 853
0
J—SCREW, RD-HD 22111
5
K—NUT,
JAM 107822
L—NUT,
PLAIN
2 2 5853
M—BOLT,
H
EX-HD
W
/INT-TEETH
LOCK WASHER 7414584
N—B
OLT, DLD-HEX-HD
7410038
P—W
ASHER,
PLAIN 502204
Q—STUD
194
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(6 )
Ass
em
ble
t
he
oil
co
ole
r s
cre
en
su
pp
ort
a
sse
mb
ly
F,
fig
.
87)
to
th
e o
il
coo
ler
s,
us
ing
p
lain
wa
she
rs
, p
lai
n
nu
ts,
a
nd
jam
n
uts
on the
bo
tto
m .
U
se
d
ril
led
-he
x-h
ea
d b
olt
s
(N
) o
n
t
he
to p
.
(7)
S
ecu
re t
he o
il
coo
le r
sc
re e
n
as
sem
bl
y (G
, f
ig .
87
) to
th
e
oi
l co
ol
er
s
cre
en su
pp
ort
w
ith
rou
nd
-he
ad
s
cre
ws
(J
)
and
i
nte
rn
al
tee
th
l
ock
wa
sh
ers
(
H,
fi
g. 87
).
8
)
A
sse
mb
le tra
ns
mi
ssio
n
co
ole
r
ou
tlet
l
ine
as
sem
b
ly (D
)
to
tra
ns
mi
ssio
n
a
nd
e
ng
ine
c
oo
le r
ou
tle
t c
onn
ec
tor
G ,
fi
g .
86
),
an
d
sec
ure
to
sh
rou
d as
sem
bl
y
w
ith
oil
c
ool
er
an
d o
utle
t l
ine
s tr
ans
mi
ssi
on
an
d e
ngi
ne
c
lip
(W
, f
ig .
1
7).
(9) A ssem
ble
e
ng
ine
oi
l
coo
ler
ou
tlet
l
ine
a
sse
mb
ly F
,
fig.
86
)
to
i
ts on
ne
to
r
a
nd
sec
ure
t
o the
sh
rou
d a
sse
mb
ly
w
ith
oi
l c
oo
ler
out
let
li
nes
t
ran
sm
iss
ion
an
d en
gin
e
cl
ip
(W
, fig
.
17
).
95
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RA P
D
15
596
1
96
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9
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198
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101
St u d
Da
ta
Note
that stu
ds a
re
t
hreade
d NC
na
tional coarse
)
on
one end
and
NF
nation
al fine
)
on the other.
The
NC
e
nd i
s th
readed
into the
casti
ng.
Part
nu
mbers
for
ove
rsize
stu
ds
h
ave a
lett
er
suffix
to indic
ate
the
siz
e. O
versize
stud
s
are
m
arked
on the
coarse
thread
end
as
shown
in
figure
94.
R
PD 1559
64
1
99
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Fig
.
No.
17
-
IT
-
41
43
_
4
3
44_
_ _
_
44
_
_ _
44 _
4
4 _
44
.̂ _
R
ef. L
tr.
F
G
U
B
M
N
Q
u
z
Le
ngth
from
boss t
o end
of
s
tud
(in
ch)
0.4 4
0.66
1 ,00
0.97
1 .46
0.8
2
2.0
2
1 .0
6
0
.88
0
.77
N
o.
r
eqd.
4
14
6
6
4
5
3
2
4
2
M
fg.
No.
CO-401881
C
O-
4018
81-
H
CO
40
188
1 S
C
O-
401
881
-J
C
O-
4018
85
C
O-
401
885
-H
C
O 4
018
85 S
CO
-40
188
5-J
CO-401861
CO
-40
186
1-H
CO
401
861
S
C
O-
4018
61-
J
CO-
401
861
C
O-4
018
61-
H
C
O-4
018
61-
S
CO
-40
186
1-J
C
O-40
193
1
CO-401931-H
CO
40
1931
S
C
O-4
019
31-J
C
O-
401
836
CO
-40
183
6-H
CO
-40
183
6-S
C
O-4
018
36-J
C
O-4
018
83
CO-401883-H
C
O 4
018
83 S
CO
-40
188
3-J
C
O-4
0181
3
CO
-40
181
3-H
CO
40
181
3 S
C
O-4
018
13-
J
C
O-4
018
24
C
O-
401
824
-H
CO-401824-S
CO
-40
182
4-J
CO
-40
1823
C
O-
4018
23-
H
CO
-401
823
-S
CO
-40
182
3-J
Or
d.
No.
7403066
706
576
6
70
6576
7
7
065
768
740
306
7
776
780
4
776
780
5
7767
920
7403097
7
7445
72
77
4457
3
77
445
74
740
309
7
7744
572
774
457
3
7
744
574
74
030
75
7767348
7
767
361
7
7673
62
74
0350
3
7
41 03
95
73
485
96
7
348
597
740
307
3
7744654
774
465
6
77
4465
5
740
307
1
774
480
3
774
455
5
774
455
6
7403
501
734
8668
7348669
734
867
0
74
0306
8
774
4855
77
4473
2
7
744
731
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Fig. No.
44_
45_
45
_
_
_
45_
45
45 __
46
53
53_ _ _
54-
Eef. Ltr.
KK
L
R
W
z
cc
N
KK
LL
CC
Length
from
boss to
en d o f
stud (inch)
1.00
1
QA
2.53
0.88
3
fid
0.97
ft
Q7
0.88
0.81
0.75
No .
reqd.
1
2
4
6
4
Mfg. No.
CO-401813
CO-401813-H
CO-401813-S
CO-401813-J
PO 4H1899
CO-401822-H
CO-401822-S
CO-401822-J
CO 401831
CO-401831-H
CO-401831-S
CO-401831-J
CO
401809
CO-401809-H
CO-401809-S
CO-401809-J
CO
401873
CO-401873-H
CO-401873-S
CO-401873-J
CO-401824
CO-401824-H
CO-401824-S
CO-401824-J
CO 401945
CO-401945-H
CO-401945-S
CO-401945-J
CO
401824
CO-401824-H
CO-401824-S
CO-401824-J
CO-401824
CO-401824-H
CO-401824-S
CO-401824-J
CO 401808
CO-401808-H
CO-401808-S
CO-401808-J
Ord. No.
7403071
7744803
7744555
7744556
7403500
7348665
7348666
7348667
7403502
7369955
7369956
7369957
7403507
7348659
7348663
7348664
7403101
7744795
7744605
7744604
7403501
7348668
7348669
7348670
7403519
7348812
7348813
7348814
7403501
7348668
7348669
7348670
7 A n Q K A i
7348668
7348669
7348670
7J.n*>91 o
7338646
7348651
7348656
201
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Fig. N o.
54
_
_ _
54- _
__
6 0—
60. -
60—
_
65 __
71
71 _
71-
_
71__ —
Eef.
Ltr.
Q Q
RR
K
LL
MM
A
R
T
CC
D D
FF
Length from
boss to end
of
stud
(inch)
0.85
0.91
0.97
0.71
0.94
0.97
0.68
0.95
1.52
0
No. reqd.
6
4
16
6
24
1
2
2
3
1
M
fg.
No.
CO-401824
CO-40182
4-H
CO 401824 S
CO-401824-J
CO
-401824
CO-40182
4-H
CO-40
1824-S
CO-401824-J
CO -401813
CO-401813-H
CO
401813 S
C
O-401813-J
CO - 40 1 867
C
O-401867-H
CO 401867 S
CO-401867-
J
CO - 40 1 861
CO-401
861-H
CO 401861 S
CO-401861-J
CO-401812
CO-
401812-H
CO 401812
S
CO-401812-J
CO-401823
CO-401823-H
CO 401823 S
CO-40 1823-J
CO-401812
CO-401812-H
CO 401812 S
CO-401812-J
CO 401931
CO-401931-H
CO
401931 S
CO-401931-J
CO-40186 9
CO-401869-H
CO-401869-S
CO-401869-
J
O
rd.
No.
7403501
7348668
734866 9
73
48670
7403501
734866 8
7
348669
7348670
7403071
7744803
7744555
7744556
7403515
7348779
73
48780
7348781
7403097
7744572
7744573
7744574
7403070
7744801
7744630
7744629
7403068
7744855
7744732
7744731
740
3070
7744801
7744630
7744629
7403075
7767348
7767361
77
67362
7350204
7348785
7
348786
7348787
202
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—
Fi
g.
No
71
72
__
__
___
72
8
0
_
__
__
8
0
8
3
83
_
_
oq
8
5
85
_
_
R
ef.
Ltr
.
GG
G
Y
G
H
J
C
N
L
en
gth
fr
om
bos
s
to
e
nd of
stu
d
inc
h)
0.57
0 5
6
0 8
2
0 4
6
1
3 7
0 9
4
0
.54
1
12
1
6
2
0
53
N
o
r
eqd
.
1
1
6
3 2
2
2
4
1
3
8
2
Mf
g. N
o
CO-401882
CO
-4
01
88
2-
H
C
O
-40
18
82
-S
C
O
-4
0
1
88
2-J
CO
-4
01
88
2
CO
-4
01
88
2-H
C
O
-40
18
82
-S
C
O
-40
18
82
-J
C
O-4
01
82
3
CO
-4
01
82
3-H
C
O
-40
18
23
-S
C
O
-40
18
23
-J
C
O-
40
18
69
C
O
-4
018
69
-H
C
O
-4
018
69
-S
C
O
-4
01
86
9-J
C
O
-40
18
71
CO-401871-H
C
O-
401
87
1-
S
CO
-4
01
87
1-
J
CO
-4
01
86
7
CO
-4
01
86
7-H
C
O
-40
18
67
-S
CO
-4
01
86
7-
J
C
O-
40
18
82
C
O-
40
18
82
-H
CO-401
88
2-
S
C
O
-40
18
82
-J
CO
-4
01
812
C
O-
40
18
12
-H
C
O-
40
18
12
-S
C
O
-40
18
12
-J
C
O-
40
19
46
CO
-4
01
94
6-H
CO-401946-S
CO
-
941
94
6-
J
CO
-4
01
881
C
O
-40
18
81
-H
CO
-4
01
88
1-
S
C
O-
40
18
81
-J
Or
d. N
o.
7403 512
7
3 48
78
2
73 4
87
8 3
73
48
78
4
7
40
3 5
12
73
48
78
2
73
487
83
7
3 48
78
4
7
40
3 06
8
7
74
485
5
7
74
47
3 2
77
44
73
1
73
50
20
4
7
3 4
878
5
7
3 48
78
6
73
48
787
7
40
3 0
99
7744661
77
446
63
77
44
66
2
74
03
515
7
3 4
87
79
73
48
780
73
48
78
1
74
03
51
2
73
48
78
2
73 487
83
73
48
78
4
7
403
07
0
7
744
80
1
77
44
63 0
77
44
62
9
740
3 5
20
7
41
00
3 3
74100 3 4
74
100
3 5
740
3 0
66
7
06
57
66
70
65
767
70
65
768
3
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Fig.
N o .
85-
_
—
87_ _ __
87_ _
89.
89-
89_ _
____
89 _
89
89
89 _____
Kef. Ltr.
E
E
Q
A
B
C
D
E
F
G
Length
from
boss to end
o f
stud (inch)
0.84
0.62
0.47
0.84
1.34
0.88
0.94
5.31
1.46
1.09
No. reqd.
9
2
8
4
2
i
ID
Mfg. N o .
CO-401824
CO-401824-H
CO-40
1824-S
CO-401824-J
CO 401937
CO-401937-H
CO-401937-S
CO-401937-J
CO-401819
CO-401819-H
CO-401819-S
CO-401819-J
CO-401811
CO-401811-H
CO-401811-S
CO-401811-J
CO-401879
CO-401879-H
CO-401879-S
CO-401879-J
CO-401942
CO-401942-H
CO-401942-S
CO-401942-J
CO-401889
CO-401889-H
CO-401889-S
CO-401889-J
CO-401819
CO-401819-H
CO-401819-S
CO-401819-J
Ord. No .
7403501
7348668
7348669
7348670
7403508
7348797
7348798
7348799
7403098
7744813
7744564
7744563
7403069
7767333
7767334
7767335
7403141
7767342
7767343
7767344
7403518
7348806
7348807
7348808
7403509
7348788
7348789
7348790
7403098
7744813
7744564
7744563
204
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Fi
g.
No.
90_
__
_
9
0__ _
__
90_
9
1 __
_
__
91
91
_
9
1_
9
1
_
_
_
91
91
__
_..
Ref
.
Ltr
.
A
B
C
A
B
C
D
E
F
G
Len
gth
from
b
oss to
en
d of
stu
d
inch
)
1 .38
0 .4
8
1 .00
1
.0 6
0.97
0 .
97
0
.70
0 .8
4
0.8 9
0.8
8
No.
r
eqd.
17
2
4
6
5
4
4
3
2
6
Mf
g.
No
.
C O-4 0 1 83 0
CO
-40
1830
-H
CO
-401
830-
S
CO-4
0183
0-J
C O-4
01 8 8
2
CO-
4018
82-H
CO
-401
882-
S
CO
-401
882-
J
C O-4 01 9 41
C
O-40
1941
-H
CO-4
0194
1-S
CO-
4019
41-J
C
O-4 0
1 8 61
CO
-401
861-
H
C
O-4
0186
1-S
CO-
4018
61-J
C O
401
861
CO-401861-H
CO-
4018
61-S
CO
-401
861-
J
C O-4
0 1 8 6
1
C
O-4
0186
1-H
CO
-4018
61-S
CO
-401
861-
J
C O
-40 1
82 3
CO
-401
823-H
C
O-4
0182
3-S
CO-4
018
23-J
C O-4
0 1 86
7
CO
-401
867-
H
CO-4
0186
7-S
CO-
4018
67-J
C O-
401 8
1 1
C
O-40
1811
-H
CO-401811-S
C
O-40
181
1-J
C O-
40 1 8
2 4
CO-
4018
24-H
C
O-40
1824
-S
CO-
4018
24-J
Ord.
No.
7403504
734
8671
73
48672
7348
673
7403
51 2
7
3487
82
734
8783
734
8784
740351 7
73
4880
3
7348
804
734
8805
74
0309
7
7744
572
7
7445
73
7
7445
74
74
03097
7744572
774
4573
7744
574
74030
97
77
4457
2
7744
573
7
7445
74
74030
68
7
7448
55
7744
732
7
74473
1
7403
51 5
7
34877
9
73
4878
0
73487
81
7403
069
7
7673
33
7767334
7767
335
7403
501
7348
668
73
4866
9
73486
70
5
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N o.
91
91 _
_
__
91
__
91 __
91
92 _
9
2
92
_
__.
9
2
92
Re
f. L
tr.
H
J
K
L
M
A
B
C
D
E
Lengt
h from
boss
to
end of
stud inch
)
0.70
0
.8 3
1 .2 8
0
.5 7
1 .0 6
1 .
95
0
97
1 .
56
3
.37
0
.88
N
o.
re
qd.
1
6
17
2
6
6
4
6
3
M
fg .
N o.
C O-4 0 1 82 3
CO-
4018
23-H
CO
-401
823-
S
CO
-401
823-J
C O
-4 01
82 3
CO
-401
823-
H
CO
-401
823-S
CO
-4018
23-J
C O-4 0 1 82 2
CO-
4018
22-H
CO
4018
22 S
CO
-4018
22-J
C
O -40
1 8 2 2
C
O-40
1822
-H
C
O-40
1822
-S
CO
-401
822
-J
C O
-401
861
CO-401861-H
C
O-4
0186
1-S
C
O-40
1861
-J
C O -
40 1 9
39
CO-
4019
39-H
CO
-401
939-
S
CO
-4019
39-J
C
O 4
0 18 6
1
CO-401861-H
C
O-40
1861
-S
CO
-401
861
-J
C O-
40 1 8
89
CO-4
0188
9-H
C
O-4
0188
9-S
CO
-40
1889
-J
C
O -4
0 1 9 2
6
CO-
4019
26-H
CO
-401
926-
S
C
O-4
0192
6-J
C O 40 1
82 4
C
O-40
1824
-H
CO
-401
824-
S
CO-
4018
24-J
O
rd. N
o.
7403068
7744
855
774
4732
77
44731
7
4030
68
77
4485
5
7
7447
32
774
4731
7403500
73
4866
5
734
8666
7348
667
7
4035
00
7
3486
65
73
4866
6
734
8667
740
3097
7744572
77
44573
7744
574
74035
1 6
734
8800
7
3488
01
73
48802
7
40309
7
7744572
7
7445
73
7744
574
740
3509
7
3487
88
734
8789
734
8790
740
351 0
7348
791
7348
792
7348
793
7403
501
7
3486
68
734
8669
73486
70
6
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F
ig.
No.
92-
_ _
9
2 _
_ _
_
92
_
_
9
2
9 2 _
_
_
92 __
_
9
2
93 _
_
93 _
93
_
__ _
Ref.
L
tr.
F
G
H
J
K
L
M
A
B
C
L
ength
from
boss to
e
nd
of
stud
inch
)
1 .34
0.88
1 .91
1.57
1
.6 0
0 .
83
0 .88
2 .86
4 .22
0 .69
N o.
reqd.
1
2
1
2
3
3
1
2
2
2
1
M
fg.
No.
CO-401819
CO
-401
819-H
CO
-401
819-
S
CO-
4018
19-J
C
O 40 1
9 45
CO-4
0194
5-H
CO-
4019
45-S
C
O-40
1945
-J
C
O 40 1
89 5
CO
-4018
95-H
CO
-401
895-
S
CO
-401
895-J
CO
-401
931
CO
-40
1931
-H
C
O-40
1931
-S
CO
-401
931-J
C
O-40
1873
CO-401873-H
C
O-40
1873
-S
C
O-40
1873
-J
C O 40
1 8 1 1
CO-4
0181
1-H
CO-
4018
11-S
CO-
4018
11-J
C O
40 1
8 2 4
CO
-401
824-H
CO-401824-S
CO
-401
824-
J
C
O-40
1927
CO
-401
927-
H
C
O-4
1092
7-S
C
O-40
1927
-J
CO
-401
874
CO
-401
874-
H
CO-401874-S
C O-4
01874
-^ T
C
O-40
1885
C
O-40
1885
-H
C
O-4
0188
5-S
C
O-40
1885
-J
O rd .
No
.
7 40 3 0 9 8
7
7 448
1 3
77 4
4564
7
74456
3
7403
51 9
73 4
8 8 1 2
73
48 8 1
3
7 3
48 8 1
4
740
3 51 1
74
1 0 0 3
0
74
1 0 0 3
1
7
41 0 0
3 2
7 40 3
0 75
776
7 3 48
77 6
7 3 6 1
7
7673
6 2
74
0 3 0 7 2
7 7 67 3 7 8
77 6
7446
7
7674
47
7 40 3
0 69
776
7 3 3 3
776
7334
7 7
6 7 3 3
5
7
40 3 50
1
73 4
8 6 68
73 48 6 69
7 3 48
67 0
7
40 3 51
3
73
4879
4
7 3 48 7
9 5
7 3 48
79 6
74
0 3 5 1 4
741 0 1
63
7 41 0 1 62
74
1 0 1 6
4
7
40 3 0 6
7
77 6
78 0 4
7
7678
0 5
7
76 7 9 2
0
7
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Fig.
No.
93
93
__
Ref. Ltr.
D
E
Length
from
boss
to
en
d of
stud
(inch)
1.00
1.50
No. reqd.
2
2
Mfg.
No.
CO-401861
CO-401
861-H
CO-401861-S
CO-4
01861-J
C
O-401837
CO-401837-H
CO-4
01837-S
CO-401837-J
Ord. No.
7403097
7744572
7 7 4 4 5 7
3
7744574
7403072
7767378
7 7 6 7 4 4 6
7
7674 4 7
Sec
t ion
XIV
.
ASSEM B LY O F EN
GINE F R O M S
UB ASSEMBLIES
102.
To r
q u e T igh tness
During engine assem
bly, nu
merous
refe
rences
are
made to
torque
specifications.
Torque wrenches with
in
dicating
scales
are prov
ided
for tightening
nuts
to speci f ied
limits. Readings
on
thes
e scales
are
worthless
unless
the
wrenches
are
used properly.
It should be
understood
that it
is
not
th
e force required to tu
rn
t
he
nut
that
is imp
ortant,
but
th
e
resu
ltant pull
on t
he stud
itself.
There
fore, resistance of
the nut to turning
must be reduce
d to
a
minimum.
Threads must be u
ndamaged and clean and
,
they must
be
lubricated
with
mica-base antiseize
compound
to reduce
un
avoidabl
e friction.
Whe
n using a torque wrench, the final reading must
be
tak
en while
the nut is
turning.
If the
torque reading
is close
to
that specified
when
the
wrench
is at the
end of
its
swing, back
off
the
nut
s
lightly and chan
ge
the
w
rench position; then pull to
the
desired reading w
hile the
nut is turning. To
start a partially
tightened nut will require
a
much
higher
torque
than
that
required
to
keep
it
turning.
Do
not
ex
ceed the
t
orque spe
cif ied. Refer to torque spe
cif ications
(
par. 167
). The
ratio
of pounds-torque to pounds-pull on
the
s
tud is
no
t an even ratio, and
excess
to
rque
may
easily overstr
ess
the stud
.
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103.
Asse m
b ly
o f
Crankc as
e Cranksh
af t
a n d Main
B e
ar ings
(fig. 65 )
Lay the crankcas
e
halves
o
n
a suitable ta
ble or
b
ench wit
h the bearing ha
lves up. Install
the
main
bearing
shells
in
their
respective bores
and
coat them
with
engine oil. The
t
hrust
main
bearing
in No. 3
loc
ation must
have
a
minimum
clearance of 0.002
inch between
the
beari
ng web
a
nd the unde
rface of
the
th
rust fla
nge.
Lift
the
cranks
haft as
sembly,
consi
sting
o
f the crank
shaft, connecting
rods
, vibration
damper,
and crankshaf
t
oil
seal, with
crankshaft
lifting sling
41-S
-3829-720 (fig. 28),
and
lower
it
gently into the left
(2-4-6)
side
crankcase
half, guiding th
e
conne
cting r
ods through the cy
l
inder
mounting
holes.
Lift
the
right (1-3-5)
side crankcase
half
with
crankcase lifting e
ye 41-E-615-35
0 (fig. 27) high
enough
to clear the
ends of
the connecting rod
s, and lower
it
gen
tly over
the cra
nkshaft, gu
iding the
connec
ting
r
ods t
hrough the
cylinder
mounting
holes
. Install
connecting rod prote
ctors 41-P-2
839-535
(fig. 23).
Install the
two spec
ial
crankcase
alinement
dow
el-type bolts (AD)
with
plai
n
washers
(AC)
in
the
fly wheel
end flange
and
the
one
crankcase
ali
nement dowel-type
bolt (SS)
with plai
n
washer
(RR)
in acces
sory
end flang
e,
by tappin
g
gently with
a
so
ft hamm
er.
A
dd
washers, plain
nuts,
an
d
jam
nuts. Install th
e 12
crankcase
cr
oss
bolts (H).
Use
the
large cross bolt
spacers (G) and
cro
ss bolt
slotted
nuts (F)
for locations
other than throu
gh the
cylinder
pad
s. Use pr
otectors or s
traps 41-S-5906
-300 (fig. 23)
under
the
eight
slotted nut
s o
n
the
cylinder mo
unting pads to p
revent
imprintin
g of the finish-ma
chined
surfaces. Install
the cran
k-
case top flange h
ex-head bolts
(AB),
wash
ers, and
nuts. Tighten
a
ll nuts.
Do not
torque
at
this time.
(f i
g. 95). Install a dial
indi
cator to th
e
f
ly wheel flange.
Insert
a
pinch ba
r
or large
scre
w
driver
be
tween
the crankshaft
counterweight a
nd the mai
n bear
ing web. Pry
the
cra
nkshaft throu
gh its limits of
end
play. End
play should b
e 0.008
to 0.012
i
nch for ne
w p
arts
and
0.008 to 0.01
7
inch
for recondition
ed parts. If end
p
lay
is not
within
these
limits, disa
ssemble the
crankcase and
install
a new
thrust
main
bearin
g.
T
he crankshaft
oil seal with
spring
asse
mbly
(CC) should be
inserte
d
in the
recess
in the crank-
case,
with the
parting line of
the seal st
aggered so it will not
b
e on the
split
line
of
the crankca
se
(t
he flat face is
away from
209
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the crankcase). Ins
tall
the
lower an
d
upper
oil seal
ret
aining
plate
(DD)
to the crankca
se
with drilled
head b
olts (FF),
p
lain
washer
(EE),
and
safety
wire.
Install the fan
drive horizontal shaf
t
bevel gear bearin
g
(PP)
in the cra
nkcase
opening
so
the
lock pin
hole
wi l l
be in
position to receive its
fan
drive
horizontal shaft bear
ing locking bolt (XX). Install
the
locking
bolt and safety wire. Install
th
e fan
driv
e
ver
tical shaft
b
earing (UU
)
in the
crankcase opening with the
dow
el
pin hol
e
in line
with the pin
hole
in the
crankcase.
Insert
the
bronze
fan
drive
vertical
shaft
bearing
dowel
pin
(TT).
/.
(1) Locate
the f lywheel with
dowel pin assembly (AE)
on
the
crankshaft hub
dowels . One
dowel
is 3°
off
center
l
ine
to
assure proper insta
llation
in
reference to timing
mark
s. Install
the
f lywheel
bolt
locks
(AF)
and fly-
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w heel to c
rankshaft drilled-h
ead
bolts (AG).
Torque
to
1,000
Ib-in.
Bend
up the tabs
of the bolt
locks.
Install
the transmissio
n shaft pilot ball bearing (AH) in
the
crankshaft hub.
(2
)
Ins
tall drive springs (
M , fig. 24 ) and
drive
spring
seats
(N) in
the
f lywheel
recesses.
Install
damper spacer
plate (J), d
amper
fricti
on disk (F), dam
per hub plate
(H), damper spring
driven
plate (G
),
a
nd damper
hub
(B).
Secure
with drilled
hex-head
bolts (A) and
torque
to
400 t
o 500 Ib-in.
Install
th
e
ot
her
damper
friction
disk
(F) damper
pre
ssure plate
(E), torsion damper
ring
(D), f lyw
heel cover
plate (C),
and its
holding
bolts.
Inser
t
transm
ission drive
quill
for alining hub. Torque
flyw heel
cover
plate bolts
to
300
Ib-in.
Place crankcas
e assembly on
kit
assemb
ly
(engine
stand) 7083741
(fig. 9). Secure with all
nuts for safety.
104. In
sta l la t io n
o f
Fan D r i v e H o u s i n g Fan D r i ve Shaf ts
and
Beve l Gears
(fig. 82 )
Through the
opening
of
the
fan
drive
housing
in
the
crank-
cas
e,
insert
the fan drive horizontal
shaft
beve
l
gear (S
) into
fan drive hor
izontal
shaft bevel
gear bearing
(T). Install
the
internal
snap ring (R
)
in p
lace
in
the
groove in
the
splines
of
the
bevel
gear.
In
th
e s ide
opening of
the fan
drive
ho
using
on
the
crank
-
case, facing
the f lywheel
end,
assemble
the fan
to
wer plug
(V,
fig.
65 ) with a new copper
annular gasket (W ) on the
inside.
Secure
with the
slotted
nut
(Y)
fan
tower
plug plain
washer
(X),
and cott
er
pin
(Z) on the outside.
Through the same opening,
place the fan drive vertical sh
aft
bevel
gear
(B) against its t
hrust
f
ace.
Me s h
it
with
the
mating
horizontal shaft
bevel gear (S). With a new
0
ring
gasket,
seal in the
recess of the
ver
tical
shaft
bearing
housing (F). In
stall
the
housing
over
the stud
s.
Install
the vertical
fan drive
s
haft
(
C), oil sl
inger
(D),
and vertical
shaft ball
bearing (G
)
on
the
shaft. Install
the
fan
drive
vertical
shaft
in
vertical
shaft
bearing (A), meshing the
sp
lines
of
the
shaft in the gear.
Insta
ll
the
ball bearing
in
the
ho
using. Tap gently with a soft
hammer.
Install fan drive oil
seal housing
(K) and
vertical
shaft
oil
seal (J)
(par.
95
c) and
secur
e with
flat-head
screws
(Q
),
plain
washers
(L), and
slotted
nuts
(M).
211
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R A
P
D 1
5596
6
2 2
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Install
the long
fan
drive horiz
ontal shaft hose nipple (V)
with
a new
copper
annular gasket
(U) in the opening, facin
g
th
e
accessor
y
end.
Screw
it tightly into
th
e
end of
the
fan
drive
horizontal
shaft
bevel gea
r
bearing (T).
Install the
hose
and
clamps
and
insert
horizont
al
fan dri
ve shaft (Y) into ho
rizontal
shaft
bevel
gear
(S).
105
Insta l la t ion of
Pis tons
C y l i n de r s
and Air
Def lec tors
Lubricate cylind
er bores and
pisto
n
rin
gs
with
engine
oil at assembly
. Insert
the piston assem
bly in large
end
of
piston ring gage and com
pressor 41-G-534-50
(fig. 96). Guide
the
assembly
into its cylin
der
until
the
ring
s
have
entered the cylinder bore. Be sure that
the piston is assem
bled
in the
correct
cylinder and
is
positioned
according to
mark
in
g
o
n the bottom of
the
piston pin bo
ss. Cylinders are marked
on the rocker
box
contact
flange, intake s ide.
Slip
off
the
gage
and
compressor and leave the
piston pin partially inserted
in the
piston pin
boss.
A
ssemble all
pistons to
their
cylinders in this
m
anner. Inst
all new cylinder
b
ase 0 ring
gaskets (A, fig. 6
0).
(fig.
97). Remove nuts fro
m
cylin
der
pad
cross
bolts an
d lift
off
straps
41-S-5906-300 (fig.
23).
Install
engine
turning
wrench
41-W-906-130
(fig .
7).
Turn
engine
to
bring
the connecting
rod of No. 5
or 6 cylinder
as
far
out of
the
crankcase
as possible.
Place the
piston a
nd
cylin
der
assembly
over the connecting ro
d, aline the piston bore
s,
and
insert
the p
iston
pin . Check
the po
sition
identification
marking.
Marking on
the boss
goes
to
the
accessory case end.
Install the cylinder hold-down
hex
nuts
(E,
fig.
6 0 ) and
torque
to 400 Ib-in at
assembly. While
c
rankshaft is
in same position,
install
the
opposing
cylinder.
Install
other
cylinders
in
the
same
manner.
Install the 12 slotted cra
nkcase cross
bo
lts (H, fig. 6 5 )
and nuts. Torque all
crankcase c
ross
bolt nuts by progressively
tightening
to
300,
600,
a
nd 750 Ib-in, star
ting
with
bolts i
n the
center cylinder and wo
rking
toward
each end. The
top flange
crankcase
bolts
and the do wel bolts
are
to
rqued to 17
5
Ib-in after
the cross
bolts
have
been properly t
orqued.
Install jam
nuts on
th
e
cylinder
hold-down nuts. Install cotter
pins
in
cross bolt
nuts. W hile
installing cylinders
to
the
crankcase,
it somet
imes
becomes
necessary to
keep
the
crankcase
cross
bolt
nuts
tight
to
preve
nt
bind
ing of
the
crankshaft
in its
bear
ings. Replace
and tig
hten nuts,
using straps
41-S-5906-300 just
enough to free
the
crankshaft.
After all cylinders
are installed, tighten all cross
bolt nuts to 750 Ib-in.
Line up cotter pin holes and secure
pins.
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776752
7
ROD
7403006
fig. 1
8).
(1
) Insta
ll the four i
nter-cylind
er baf
fles G, fig. 60
), us
ing
hex-he
ad bolts (H)
and lo
ck
wash
ers
(J).
(2
)
In
stall
the six
cylinde
r head air deflec
tors (KK,
fig.
60) over
their studs
and slide
into
place
ove
r the cy
linder
hea
d
fins.
(3) Lay
the eight
No. 1 a
nd 6 cyli
nders air
deflectors (A)
.intermedi
ate
cy
linder air deflec
tors
(F) a
nd
No.
2 and
cylin
der air def
lectors (G
) fig
. 98) in positio
n
o
n the
cylinder
s and
secu
re them with
th
e
deflecto
r bolt
s
and
lock
washers, sp
rings, hooks cla
mps,
and plain
nuts.
Connect
the defle
ctors with
the
a
ir defl
ector
spacers
drilled
hex
-head bolts (D
), slotted nu
ts
(
C),
and
cotter
p
ins (B).
106
ns tal lat ion
o f
Scavenger
and
P res s u r e
Oil
Pum p
In
stall
the scaven
ger and pressure
o
il pump fig.
11) assem
bly
to the c
rankcase mount
ing
studs and s
ecure with fo
ur
plain
wash
ers (S, fi
g. 71),
slotted
nuts
(R), and safety
wire
.
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A—DEFLECTOR, AIR, CYLINDERS NO.
1 AND 6 7375871
B—PIN,
COTTER 121223
C—NUT
, SLTD
225838
D—BOL
T, DLD,
HEX-HD 583752
E—SPACER,
AIR DEFLECTOR 7744
730
F—DEFL
ECTOR, AIR, INTERM
EDIATE
CYLIN
DERS 7345414
G—DEFLECTOR, AIR
CYLINDERS NO
.
2
and
5
7375873
H—WASHER, LOCK
120380
J—BOLT, DLD
-HEX-HD 7376018
K—SPRING, AIR DEF
LECTOR END
L—
HOOK,
AIR DEFLEC
TOR 7744720
M
—CLAMP, AIR
DEFLECT
OR 7744861
N—WASHER,
LOC
K
120217
P—NUT, PLAIN 225850
Install
scavenger
pump
suction
line
(W,
fig.
71)
with
a
new
suctio
n line gas
ket
(X
). S
ecure
to
the
crankcase
w
ith two
slotted
nu
ts (A) an
d
safety
wire.
107 In
s ta l l a t i on o
f Accesso r y Case
to
C
r ankc as e
a. Insert the ma
in accessory
drive shaf
t
(
Z, fig. 39) in the
c
rankshaft
vibration
dam
per
hu
b. Install three "0"
ring gaskets
(fi
g.
35) on
the acce
ssory-case-to-cr
ankcase oil
transfer tubes.
Install
the
accessory-case-to-crankcase
gasket
(T,
fig.
35).
Install
the fan
drive horizonta
l shaft
hose nipple (V,
fig.
82)
in the
accessory
case with a new
gas
ket.
I
nstall
the
pressure
oil pump
drive
shaft
(Z , fig.
71).
M esh
the
splines of
the
shaft in the
splines
of the pressure
pump
drive bevel
gear.
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6.
In
st
al
l th
e
ac
ce
ss
or
y
ca
se
to
th
e c
ra
n
kc
as
e,
s
li
din
g
th
e ca
se
on
t
he
s
tu
ds
, a
nd
en
te
ri
ng
th
e m
a
in
a
cc
es
so
ry
dr
iv
e
s
ha
ft
, p
r
es
su
re
p
um
p
d
ri
ve
sh
a
ft
Z ,
f
ig
.
71
),
a
nd
th
e h
or
izo
n
ta
l
fa
n
dr
iv
e
sh
af
t
Y
,
fig
.
8
2) i
n
t
he
ir
re
sp
ec
tiv
e
po
s
iti
on
s
in
t
he
a
cc
es
so
ry
ca
se.
It
ma
y
b
e ne
ce
ss
ar
y
to
tu
rn
e
ng
in
e
w
ith
tu
rn
in
g
wr
en
c
h
to
mate
splines
of
gears in
accessory
case.
Secure
the
accessory
ca
se
to
t
he
cr
an
k
ca
se
,
us
in
g
1
2 p
la
in
w
a
sh
er
s,
p
la
in
n
ut
s,
ja
m
n
ut
s,
six
p
la
in w
a
sh
e
rs,
slo
tt
ed
n
u
ts,
an
d
sa
fe
ty
w
ir
e.
1
08
In
st
al
la
tio
n
of
Ca
m
sh
a
f ts
an
d
V
al
ve
R
o
c k
er
s
In
sta
ll
t
he
l
ef
t
c
am
s
ha
ft
d
riv
e
sh
a
ft
ho
u
sin
g
n
ut
s
D
D
,
fig
. 3
5
)
ov
e
r
th
e d
riv
e
sh
af
t h
o
us
in
g
(
E
E
).
In
st
al
l n
ew
0
ri
ng
ga
sk
e
ts
V
)
o
n
th
e
ho
u
sin
g
an
d
in
se
rt t
he
ho
u
sin
g
in
t
he
camshaft drive housing (Z). Tighten
the
drive
shaft
housing
nu
t
fm
g
e
rti
gh
t o
n
t
he
dr
ive
ho
us
in
g.
6.
R
em
o
ve
th
e
l
ef
t (2
-4
-6
)
s
ide
va
lv
e
ro
ck
er
sh
af
t
b
ra
ck
e
ts
21
6
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U ,
fi
g .
60
) f
ro
m
the
c
yl
ind
er
s. I
ns
tal
l
th
e
ca
ms
ha
ft
a
nd
c
am
sh
af
t g
ea
r
h
ou
si
ng
as
se
mb
ly
fig
. 2
1),
en
te
rin
g
th
e c
am
s
ha
ft
dr
ive
s
ha
ft
h
ou
sin
g E
E,
f
ig .
5
3)
in
the
ca
ms
ha
ft
dr
iv
e
sh
af
t
s
up
po
rt
F
F,
f
ig .
53
).
Po
si
tio
n
th
e i
nte
r-
cy
lin
de
r
c
on
nec
to
rs
U
,
fig
.
53
)
in
the
cy
lin
de
r
h
ea
d
co
un
te
rb
ore
s.
K
e
pla
ce
t
he
val
ve
rocker
shaft
brackets
in
their
original
positions.
Torque
shaft
br
ack
et
b
ol
ts
f
ig .
10
2)
pr
og
re
ssi
ve
ly t
o
175
Ib
-in
a
nd
se
cu
re w
ith
sa
fet
y
w
ire
.
Th
e l
ong
dri
ve
sha
ft h
ous
ing
E
E
, fig
.
53
) go
es
on
th
e lef
t 2
-4-
6)
si d
e a
nd
t
he
sh
ort
dri
ve sh
aft
ho
us
ing
V
V,
f
ig . 54
)
o
n th
e
rig
ht
1
-3-
5)
sid
e.
S
et v
alv
es
. S
et
al
l
i
nt
ak
e
va
lve
r
oc
ke
r c
lea
ra
nc
es e
x
ep
t
No
.
t
o
0.
007
in
ch a
nd
se
cu
re
the
a
dj
us
tin
g
sc
re
w ja
m
nu
ts
. S
et
N
o.
int
ak
e
va
lv
e
ro
cke
r
cle
ar
an
ce
to
0.
10
0 i
nc
h
pa
r.
1
09
, f
ig .
101). Set
exhaust
valve
rocker
clearance
with
g age
41-G-415-375
fig
. 99
)
to
0.
01
4
in
ch
b
etw
ee
n
th
e c
am
lo
be
an
d
th
e
va
lve
r
ock
er
rol
ler
and
se
cu
re
w
ith
th
e
a
dju
st
in
g sc
rew
jam
n
uts
. I
t
is
n
ece
s
s
ary
t
o s
et
th
e e
xh
au
st
v
al
ve
c
lea
ra
nc
e in
t
hi
s
m
an
ne
r
as
t
he
en
d
o
f
the
v
alv
e i
s
in
it
s s
pr
in
g
re
ta
in
er
re
ces
s a
nd
a
fee
le
r g
ag
e
c
an
no
t
be
us
ed
a
t
th
e
val
ve
.
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I
nstal
l the
ca
msha
ft ge
ar
hous
ing to
the N
o.
2 cyl
inder
wit
h
hex-h
ead
bolt
s
P)
and t
ab
wash
ers Q),
figur
e
53
.
Tigh
ten the
c
amsh
aft
drive sha
ft
hous
ing nuts
, usin
g
crow
fo
ot wr
ench 7
0837
92
fig. 10
0).
Sec
ure with
safet
y
wire.
D o
not
install camshaft
drive
shaft
M , fig. 53)
until
engine
timing
is
d
one
par
.
1
09).
/. Insta
ll
the
cam
shaft
ass
embly
fo
r t
he rig
ht
1-3-
5) sid e
fig . 54)
a
s out
line
in
and abo
ve.
Set
N
o.
1 intak
e v
alve
r
ocker
c
learan
ce to
0.100 in
ch
and
all othe
r
intak
e v
alves
to
0.0
07 inc
h cl
earan
ce. E
xhau
st val
ves
wi
ll
b
e s
et
a
t 0.014
inch
at
rolle
r and c
amsh
aft.
109
Valve
and
Magneto
Tim in g
1)
S
et N o.
1
cyli
nder in
take
val
ve clea
rance
to
0.1
00 inc
h
using
ga
ge 41
-G-4
15-37
5 f
ig. 101)
. Ro
tate
the c
rank
shaf
t
c
lockw
ise, as
v
iewe
d
f
rom the
acc
essor
y
end, with
en
gine
tur
ning
wre
nch 4
1-W-
906-1
30
fig. 7),
until
2
8
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R A P D
180569;
_J
timing mark OP
P
ENG 1
& 2
INT
100
C
L is
alined
with the timing
pointer. Turn right (1-3-5) side cam
shaft counterclockwise as vie
wed from the accessory end
until No.
1 intake valve
has
j
ust closed
.
The
clos
ing
point is precis
ely determined
by rotating the intake
valve
rocker roller
by
hand
as
the
camshaft
is
being
turn
ed.
The valve
is closed
at
the
instant
the roll
er be
comes free
. Insert the camshaft drive
shaf
t, using
re
mover a
nd replacer 41-R-2378-575 (fig. 19).
If the
shaft
will
not
enter the
splines,
withdraw it
and turn
slightly.
It
may
be necessary to turn the
shaft a num
ber o
f
time
s until mating splines
are
fou
nd.
Caution
D o
not
dri
ve it
in.
The
camshaft
drive
shaft
is
machined
with
a 21-tooth
spline
on
th
e inner end an
d a
25-tooth
sp
line
on the
outer
end. This
differential
number
of
teeth
in the
splines
gives the
dr
ive shaft a
vernier effec
t.
It is
there
fore
possi
ble to i
ndex
the
shaft so it w ill engage the
matin
g
splines
of its gears, without
changing
the rela-
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tionsh
ip of the
cam
shaft
to
the crank
shaft,
there
by pro
v
iding a
n accu
rate
settin
g.
(
2) Chec
k th
e
t
iming
as fo
llows:
Rota
te th
e
c
ranks
haft o
ne-eig
hth
turn
cou
nterclo
ck
wis
e, as
vie
wed from
th
e a
ccesso
ry end, to
remov
e
g
ear back
lash.
Slow
ly ro
tate the
cra
nksha
ft clock
wise,
turnin
g
the
No. 1
inta
ke valve
roc
ker
roll
er
at
the
s
ame
tim
e.
Sto
p tur
ning at
the
inst
ant the
rol
ler
be
comes
free.
c
) O
bserv
e pos
ition
of
th
e timi
ng m
ark
and p
ointer
.
If
they
are a
lined,
eng
ine
is
time
d
c
orrect
ly.
If the
y
are m
isalin
ed by mo
re th
an
one
-fourt
h
of
an
inch,
w
ithdraw
the cam
shaft
drive
sh
aft a
nd
r
epeat
the
timing
procedure.
If corre
ct timin
g cann
ot
be
do
ne as
outline
d ab
ove, it
may b
e ne
cessary
to insta
ll
the cam
shaft wh
en the ti
ming
m
ark
is one
-eighth
to
on
e-quart
er
o
f
an inch
out
of
line w
ith the
timing
poi
nter.
3)
Install
t
he camsh
aft
oute
r
oi
l-trans
fer
p
lug R, fig.
54)
,
usin
g rep
lacer
41-R-
2378-
575 fig
. 19).
Secu
re the
plug
w
ith
an inter
nal sn
ap rin
g (S
,
f
ig. 5
4). I
nstall
gear
housing
cover
(U),
using
a new
gasket.
Secure
with
pla
in w
ashers
(V
),
dril
led-he
ad b
olts (W
), and
s
afety
w
ire.
I
nstall
t
he ta
chom
eter
transm
itter
driv
e sh
aft
R I T
1-3 -
5)
SIDE
CA M S H A
FT
ROT
A TION
L E
FT
2-4-6)
SIDE
C
A M S H A F
T
ROT
ATION
VIE
WED FROM
A C
CESSOR Y
END
RA P
D 18
0570
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TIMING
H O L E
IN TRANSMISSIO
N
TIMING NOTCH
ON
TRANSMISSION
ADAP
TER PILOT
CENTERLINE
OF
FLYWHEEL
AS
VIEWED
FR O M
FLYWHEEL
END
OF EN
GINE
CYL INDERS.LEFT
2-4-6) SIDE
TIMING
M A R K S
R
A
PD 180571
(Z)
and
tachometer
transmitter
drive
adapter
(BB)
with new oil se
al
(DD). Secure
w
ith
plain
washer
s
(V), pla
in
nuts
(LL),
and
jam
nuts
(KK).
(1) Af
ter timing
the right
side
va
lv es, rota
te the crank
shaft cloc
kwise, as viewed
from
the
accessory e
nd, u
ntil
the
timi
ng
m
ark
OPP EN
G
IN
is alined with
the
pointe
r.
If
magneto
timing
is performed independently
of
valve
timing
,
line up
the flywheel timing mark
and pointer with
the
N o
. 1
cylinder
on
its com
pression stroke.
Install new magneto
gaskets (E,
fig. 44). Remove
the
magneto
cover a
nd
ali
ne
the magneto timing
m
arks
(fig. 1 0
5), using timing mark
L on the magnet
o hou
s-
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i
ng.
Inst
all th
e
ma
gne
tos
wit
h m
oun
tin
g stu
ds
cen
tere
d
in
t
he
adju
sti
ng
slo t
s.
U
se
the
ti
min
g line
m
arke
d L
o
n t
he mag
net
o ho
usin
g.
The
timi
ng li
ne
m
arke
d R
is f
or
ro
tatio
n in
t
he opp
osite
dir
ec
tion
.
Secure
the
magnetos
with plain washers
(NN),
plain
nu
ts (Z
),
an
d
jam
nu
ts
Y
, fig. 11
0).
2)
S
ync
hro
niz
e th
e m
agn
eto
s, u
sing
tim
in
g li
ght
41
L 1
43
9
fig
. 7
).
(
a) S
ecu
re
the
ti
min
g
lig
ht gro
und
c
abl
e cli
p to
o
ne m a
g
ne
to h
ous
ing
.
Cl
ip the
tw o
re
mai
nin
g lea
ds to
th
e
bre
ake
r ppst
of
eac
h
ma
gne
to .
c)
Ro
tate
t
he
cr
ank
sha
ft cou
nte
rclo
ckw
ise
,
as
v
iew
ed
fr
om
the
a
cce
sso
ry en
d
o
ne
eigh
th t
urn
; t
hen
s
low
ly
ro
tate
c
loc
kwi
se u
ntil
tim
ing
lig
hts
com
e on
.
B
oth
li
ghts
sho
uld
com
e on
at th
e
t
ime
th
e
flyw
he
el
tim
ing
m
ark
al
ine
s
w
ith th
e po
int
er.
If
th
ey
d
o not
,
loo
sen
th
e m
agn
eto
f
ast
eni
ng
n
uts
a
nd
adj
ust
m
ag
net
os
unt
il b
oth
lig
hts
com
e o
n.
Tig
hte
n f
aste
nin
g
222
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nu
ts.
When
magnetos a
re synchroniz
ed and timed
,
o
bserve
w
hether
magneto timing mar
ks are
alined. If
they are not,
it
me
ans
that
th
e
bre
aker
point adjust
men
t
is
inco
rrect.
Adjust
breaker
p
oints (TM
9-1825E). Install
and
time the magne
tos.
In
stall the magne
to
ada
pter
and secure
w
ith lock
washers
(E)
and drilled fillist
er-head screws (D, fi
g.
110).
After timing m
ag
neto
s,
rota
te
the
cranks
haft clockw
ise, as
viewed from accessory
end,
until
the
f
lywheel timing
mark
OPP ENG 1
&
2
INT 100
C
L alines
with
timing
pointer. Set and
check
left
(2-4-6)
side
valve
timing
in
the
same
manner
as
right
(1-3-5)
side
above).
Install the ou
ter oil-transfer
plug (L) and
snap ring
(K , fig. 53).
Install the g
ear housing c
over
(H
) with new ga
sket and se
cure
with plain w
ashers, plain
nuts, and
jam
n
uts.
Remove en
gine
turni
ng wrench 41-W
-906-130
(fig.
7).
1
10. Ins tal la
t i o n o f Valve
Rocker Cov er
s
Install
all va
lve
rocker
covers. Position
ignition harness
clam
p
assembly (T,
fig. 110) over
bolt
holes
on
flywheel side
of No. 1
and No. 2 an
d the
a
ccessory
side of No. 5
and
No.
6 rocker
covers.
Install
plain w
ashers
(Y), lock
washe
rs
(X),
and hex-
head
b
olts
(W ,
fig. 60). I
nstall valve
ro
cker box
covering
pl
ates
(T, fig. 53)
and (L,
fig. 54) on N
o. 5 and No. 6
cylinders with
new gaskets.
Secure
with tab w
asher and bolts.
Fasten No. 1
and
No.
2 valve
rocker
covers to
their
camshaft
housings
with
tab
washers
and
b
olts.
1
11.
In
s ta l l a t i on o
f Fuel P u m p G o v e
r n o r A s s em
b ly and G o
v
e r n o r
Co n t ro l Sha f
t Brac ke t
I
nstall gove
rnor assembly with ne
w governor gasket
(F).
Secure
with
plain
washer (G),
plain
nut (H),
and
jam nut
(J).
Install the control
shaft support b
racket (E, fig.
74). Secure
with
p
lain washers, p
lain nuts, and
jam
nuts
.
Install fuel pump
assembly (Y,
fig. 45 ) with
a new fuel
p
ump gasket (X).
Secure with pla
in
wa
shers
(M), pla
in
nuts
(N),
and jam nut
(P).
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11
2.
I
n s
ta
l la
t i
o n
o
f
Ca
rb
u
r e
to
r El
bo
w
C
ar
bu
re
to
rs
As
p
ir a
to
r
L i
n e
s a
n
d B
r e
at
h e
r
L
in
es
In
sta
ll
th
e
ca
rb
u
ret
or
e
lb
ow
(
D,
fig
.
4
9 )
to
su
pe
rc
ha
rg
er
ho
us
in
g ,
us
in
g a
n
ew
0
r
in
g g
as
ke
t
(E
).
S
ec
ur
e w
it
h
pla
in
washers (C),
plain
nuts (B),
and
jam nuts (A).
6 .
In
st
al
l
ac
ce
sso
ry
cas
e
l
ef
t
a
nd
r
ig
ht
b
re
a
the
r
li
ne
s
(V
)
a
nd
(W
)
,
(fi
g.
11
3)
.
Ti
gh
te
n
th
e
li
ne
n
u
ts
a
nd
s
ec
ur
e w
ith
br
ea
th
er
lin
e c
la
m
p
p
lat
e
A
A
)
a
nd
cl
am
p
s
(B
B
),
(fi
g.
1
13
).
In
st
al
l
ca
rb
u
re
tor
-e
lb
ow
-
to-
as
pi
ra
to
r
lin
e (
E
E,
fig
.
10
6)
.
Pla
ce
t
he
ca
rb
ur
et
or
s
on
th
e
el
bo
w
st
ud
s,
us
in
g
c
ar
bu
re
to
r-
to-
el
bo
w
g
as
ke
t
(K
)
a
nd
c
ar
bu
re
to
r
m
ou
n
tin
g
sp
ac
er
(L
, f
ig .
8
5
).
Se
cu
re
w
it
h
p
la
in
w
a
sh
er
s (
F)
,
p
la
in
nu
ts
(
G
), a
nd
jam
nu
ts
(H). Install
the
carburetor-air-inlet-to-aspirator
lines
(DD,
fig.
10
6 )
.
11
3.
In
s t
al l
at
io
n
o f
A c
ce
s
so
ry
C
as
e
S c
av
en
g
er
O
il
P u
m
p
In
st
all
th
e a
cc
es
so
ry
ca
se
sc
av
en
ge
r
o
il
pu
m
p
a
ss
em
b
ly
t
o
t
he
m
o
un
tin
g
f
lan
g
e
o
f
ac
ce
ss
or
y c
as
e.
P
o
sit
io
n
the
sc
av
e
ng
er
oil
p
um
p
\be
ve
l ge
ar
(A
,
fi
g .
7
2 )
an
d
s
ec
ur
e
p
um
p
w
it
h
f
iv
e p
la
in
washers
(C),
slotted
nuts (B),
and
safety
wire .
Install
crank-
c
as
e
s
ca
ve
ng
e
r p
um
p
ou
tl
et
li
ne
(
V
,
fi
g.
7 1
)
an
d
ac
ce
sso
ry
ca
se
sc
av
e
ng
er
o
il
p
u
mp
ou
tle
t
lin
e (V
,
f
ig
.
35
) a
nd
se
cu
re
w
i
th
o
ne
d
ri
lle
d-
he
ad
b
ol
t
a
n
d
sa
fe
ty
w
ir
e.
11
4
. I
ns
ta
l la
t i
o n
o f C
r
an
k c
as
e
O
il
P a
n
In
se
rt
th
e i
nt
ak
e
m
a
ni
fo
ld
b
al
an
ce
tub
e
(
A
,
fi
g.
65
)
in
t
he
crankcase.
Install
balance tube
flange
s
C
) w
ith
ne
w
0
ri
ng
ga
sk
et
s
B)
an
d
s
ec
ur
e
w
it
h
dr
ille
d
h
ex
-h
ea
d
bo
lts
D
)
a
nd
sa
fe
ty
w
ir
e.
In
sta
ll
t
he
e
ra
nk
c
as
e
o
il
pa
n
a
ss
em
b
ly
w
it
h
a ne
w
o
il
pa
n
to
c
ra
nk
ca
se
ga
sk
et
(
B
, f
ig .
8
0)
. S
ec
ur
e
w
ith
4
0
pla
in
wa
sh
er
s
(M
, f
ig .
8
0) pla
in
nu
ts
(L
)
, an
d
jam
nu
ts
(
K
).
1
15
ns
ta
l la
t io
n
o
f
A
c c
es
so
ry
C a
se
O
il
S u
m
p
In
st
al
l
th
e
oi
l pr
es
su
re
re
gu
la
to
r
sp
il l
lin
e
(
X
, fig
.
3
5
)
a
nd
s
na
p
r
in
g
(W
)
in
p
os
iti
on
.
In
s
tal
l
th
e
ac
ce
ss
or
y c
ase
o
il
sump
assem
bl
y
(
P,
fi
g.
80
) w
it
h
n
e
w s
um
p
-t
o-
ac
ce
sso
ry
c
ase
g
as
k
ets
A
)
an
d
su
m
p-t
o-
pa
n
ga
sk
et
(N
)
.
S
ec
ure
th
e
su
mp
t
o
th
e s
id
e
of
th
e
o
il
p
an
wi
th
fo
u
r d
ril
led
-h
ex
-h
e
ad
bo
lt
s (V
)
, p
lai
n
w
as
he
rs
M
)
,
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lock washers (W ) and safety
wire .
Install
the
16 plain washers
(U), plain
nuts (T),
and jam
nuts
(S ) which hold the s u m p to
the
accessory case .
116. Ins ta l la t ion of In take
Manifolds
Connec to rs
and
Bal
ance
T u be
Connector
Tubes
(fig.
106)
With eng in e turned
upside down ,
install the
right (1-3-5)
side
and
left
(2-4-6)
side manifold assembl ies (par. 91) on
cyl inders,
using n e w
gaskets. Se cu r e
sec t i ons t o
cylinders
with
plain washers (S), plain
nuts
(T),
and
jam nuts (U).
Install
left
(2-4-6)
side
intake
manifold
connectors
(C)
and
right (1-3-5) side
intake manifold connectors
(X), using
n e w
intake manifold connector
to supercharger
housing
gaskets
(AA).
Install
mani fo ld sec t i on hoses
(D)
a n d n e w or serviceable hose
c lamps
(E).
Se cu r e
c on n e c t o r f lange to the supercharger
hous
i ng f lange with lock washers (Z)
and
hex-head bol ts (Y).
Install
the intake manifold balance tube c on n e c t o r tubes
(J) with connec t o r
tube
hoses (K)
and
hose c lamps (P), inserting
the
intake
manifold
balance
tube
(N)
in
the
hoses
as
the
c o n
nector tube
assembl ies
are
pos i t i oned . Secure
the connector tubes
to the mani fo ld sec t i ons with dril led hex-head bol t s
(JJ)
and
safety wire .
Position
all
hoses
o n
attaching parts. Center them
so
c lamps
get a posi t ive grip
o n
the manifold sec t i ons to avoid leakage.
Tighten all c lamps .
S c r e w aspirator
assembl ies
(GG) to the
intake manifold
sec t ion s
o f No .
1
and
No.
2
cyl inders.
Attach
90°
tube
e lbow
(B) and carburetor-elbow-to-aspirator l ine flared tube connector
(FF) to the aspirator and
c o n n e c t
the
carburetor-elbow-to-aspira
tor
flexible l ine
assembly (EE)
and
left
and
right
carburetor-
air-inlet-to-aspirator flexible l ine
assembly (DD)
to the
aspirators
from the carburetor and
90°
f lared tube
e lbow
(P,
fig.
85).
117.
Ins ta l la t ion o f C y l i n d e r H e a d
Oil
Dra in
Manifold
(fig.
107)
a.
Attach oil
drain cylinders N os .
5, 1,
2,
3,
4, and
6
manifold
sec t i ons (B),
(C),
and
(P)
to
their
cylinder head mounting pads,
using n e w
manifold-section-to-cylinder head
gaskets
(K) and
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RA
PD
1805
72
a
nnular
gask
et
M
)
on
the ma
nifold
secti
on
b
olts (N
). U
se new
manif
old sect
ion ho
ses
(A) a
nd n
ew o
r serv
iceabl
e hose clam
ps
(L
).
Tight
en the
bol
ts and
secu
re t
hem with s
afety
wi
re.
6.
I
nstall
th
e cylin
der-he
ad-oil-
drain-
manifo
ld-to-
oil-pan
adap
t
er (S)
to the
cran
kcase oil
pan,
usin
g
a n
ew g
asket.
Secu
re wi
th
drilled
hex-head
bolts
(U) and
(V),
plain
wa
shers (T),
and
sa
fety
wire
.
Inst
all
cylind
ers N
os. 5, 1,
2, a
nd
6
o
il
dra
in
l
ine assem
blies
(Y
), (
E), (
F),
and
Q
) in th
eir
respec
tive
positio
ns, us
ing new
gask
ets.
Secure
th
em with
he
x-head
bolt
s
(X) and
l
ock washe
rs
(W
).
Positio
n
the hoses
and c
lamps
,
maki
ng
cer
tain
t
he clamp
s
get
a
positive
grip
in
the
hoses
of
the manifold
sections
to
avoid
leak
age. Tig
hten
th
e
c
lamps
.
In
stall le
ft and
rig
ht
ca
mshaf
t gear
ho
using
oil dra
in hoses
G)
and
(D), with
clamp
s on
th
e conn
ection
s of th
e cylind
ers N
o.
1
and
No. 2
oil
dr
ain
line
as
sembl
ies (E) a
nd (F)
, to
the
cam
shaf
t
gea
r
hou
sings.
Ti
ghten
th
e clamp
s.
226
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A—ELBOW , TUBE,
90
DEC, AIR INL
ET-TO-ASPIRATOR,
LEFT
(2-4-6)
SIDE
7376777
B—ELBOW, TUBE,
90
DEG 7376 1 2 2
C—CONNECTOR,
INTA
KE MANIFOLD,
LEFT
(2-4-6) SI
DE 7346616
D—HOSE, MANIFOLD
SECT
IONS 7375237
E—CLAMP, HOSE 502948
F—MANIFOLD SECTION,
CYLINDER NO. 2 7346554
G—MANIFOLD SECTION, C
YLINDER
NO.
3 and NO.
4
7767246
H—
MANIFOLD
SE
CTION, CYLINDE
R
NO.
6
734
8832
J—TUBE,
CONNECTOR, INTAKE MANIFOLD
BALA
NCE TUBE
7348830
K—HOSE,
CONNECTOR TUBE 7403382
L—
FLANGE, BALANCE TUBE 73488
15
M—GASKET,
0
RING 501
232
N—TUBE, BAL
ANCE, INTAKE MANIFOLD 7348816
P—CLAMP
,
HOSE
502919
Q—GASKE
T,
CONNECTOR-TUBE-TO-MAN
IFOLD SECTION 73465
10
R— P
LUG,
PIPE 75
38990
S—WASHER,
PLAIN 502245
T—NUT, PLAI
N
225853
U—NUT, JAM
107822
V—MANIF
OLD
SECTION,
CYLINDER
NO.
5, ASSY
7348831
W—MANIFOLD SECTION,
CYLINDER
NO .
1,
A
SSY 7346553
X—CON
NECTOR, INTAKE MANIFOLD, RIG
HT (1-3-5) SIDE 7346615
Y
—B OLT ,
HEX-H
D 58374
9
Z—WASH
ER,
LO
CK 120214
AA—GASKET
,
INTAKE MANIFOLD
CONNECTOR
TO SUPER
CHARGER HOUSING
7744566
BB—ELBOW,
STREET,
90
DEG,
AIR
INLET-TO-ASPIRATOR,
RIGHT
(1-3-5) SIDE 7410046
CC—CON
NECTOR,
FLARED
TUBE,
AIR
INLET-TO-ASPIRATOR
LINE
74
10040
DD—LINE, FLEXIB
LE, CARBURETOR-AIR-INLET
-TO-ASPIRATOR,
LEFT AND
RIGHT,
ASSY
7376
000
EE—LINE, FLEXIBLE, CARBURETOR-ELBOW
-TO-ASPIRATORS,
ASSY 7744710
FF—CON
NECTOR, FLARED TUB
E,
CARBURETOR
-ELBOW-TO-ASPI
RATOR
LINE
7376 1 2 1
GG—ASPIRATOR,
AS
SY
7376
128
HH—BOLT, DLD-HEX-HD 7403158
JJ—BOLT,
HEX-HD
583749
KK—GASKET,
M
ANIFOLD
S
ECTIONS 7744566
Continued
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A—
HOSE
, MA
NIFOLD
SECTIO
NS
740338
2
B — -M
ANIFOL
D SECTIO
N, CYL
INDER
N
O . 5 734
6 583
C—
MANIF
OLD SE
CTION
, CYLIN
DERS N
OS.
1, 2 , 3
AND
4
73
46582
D— HO
SE, OIL
DRA
IN, RIG
HT CA
MSHA
FT GE
AR HO
USING
74033
84
E—
LINE
,
OIL DRA
IN, CYL
INDER
N
O. 1, ASSY
73
48751
F—LINE,
OIL
DRAIN, CYLINDER
NO.
2,
ASSY
7375433
G
— .H OSE
,
O
IL D
RAIN,
LE
FT CAM
SHAFT
GEA
R HOU
SING,
74034
6 6
H
—ELBO
W , H
OSE,
45
DE
G, MALE
PIPE
END
7346
711
J—C
LAMP
, HOSE
502912
K
—GAS
KET, MAN
IFOLD S
ECTION
-TO-C
YLIND
ER H
EAD 776
7933
L— CLA
MP,
HOSE
502919
M — G
ASKET
,
A
NNUL
AR
105
452
N— BO
LT, M
ANIFO
LD SECTI
ON 7
76 7928
P—
MANIF
OLD SECT
ION, C
YLIND
ER
N O.
6
7375430
Q—LI
NE, OIL D
RAIN,
CYLIN
DER
N O . 6
,
AS
SY
737542
4
R
—GAS
KET, OIL D
RAIN LI
NES
AND
ADAP
TER
734651
0
S—A
DAPTE
R, MANIF
OLD-T
O-OIL-
PAN 737
5423
T
—WAS
HER, PLAI
N
50224
5
U— BO
LT, DL
D-HEX
-HD
7346710
V
— BOLT
,
DLD-H
EX-HD
73487
70
W—
WASH
ER, LOC
K 102
2 14
X—
BOLT,
HEX-H
D
583749
Y—
LINE,
OIL
DRAI
N, CYLIN
DER
NO . 5, A
SSY
737542
5
—Con
tinued
118 In
sta l lat i
o n
of P
r im e r
L
ines and F
i l ter
fig. 108)
Ins
tall p
rimer-
fuel-fi
lter mo
unting
brack
et
(
N)
t
o
t
he
super
charger
housing. Secure
with
lock
washer
(K)
and
hex-head
b
olt (L
). Sc
rew
th
e
pri
mer filter
a
ssembl
y
M
)
to th
e
bracke
t.
Instal
l th
e pri
mer
filter
brack
et
tu
be
conne
ctors
(J) in the
brack
et.
In each
c
ylinde
r p
rimer
line nozzle
instal
l
t
he
inter-
cylinde
r
pri
mer lin
e
tube
tees
(G
), a
nd secu
re them
w
ith the co
mpress
ion
tube fitti
ng s
afety
ball s
leeves (E
) and
c
ompres
sion
tub
e fittin
g
sl
eeve
ball nu
ts (F
).
Install
primer
lines
and
primer
filter
to
cylinder
No.
1
line
(H
) on
t
he
rig
ht (1-3
-5)
side cyl
inders
. Ins
tall
prim
er
l
ines
and prim
er
filt
er t
o
cy
linder N
o.
2 line
(P) on th
e
left
(2
-4-6)
side
cylinde
rs.
Install
primer
lin
e
t
ee plu
g (A) i
n t
he inte
r-
cylind
er prim
er li
nes tube
tees
G) o
n cylin
ders
No.
5 and No
. 6
.
229
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RA
PD
180574
A—PLUG,
PRIMER
LINE TEE
7744647
B—LINE, PRIMER, CYLIN
DERS NO.
3 TO 5 AND NO. 4
TO 6
7372620
C—LINE, PRIMER, CYLINDER
S
NO. TO 3 and NO. 2
TO 4
7
372618
D—NOZZLE. PRIMER LIN
E, ASSY 7410158
E—SLEEV
E,
BALL,
SAFE
TY, COMP
RESSION TUBE FITTING
189911
F—NUT, BAL
L
SLE
EVE, COMPRESSION
TUBE FITTING 18
9894
G—TE
E,
TUBE, IN
TER-CYLINDER
PRIMER LINE
S
774464
8
H—LINE
,
PR
IMER
FILTER TO CYLINDE
R NO. 7376037
J—CONNECTOR, TU
BE, PRIMER
FILTER BRACKET
501105
K—WASHER,
LOCK 120214
L
—BOLT, HEX-HD 58
3749
M—FILTER, PRIMER,
ASSY
7346703
1—HEAD,
FILTER
Z-F7
X
130
2—GASKET,
BOWL Z-F1 X 38
3—ELEMENT
Z-F2
X
1T2
4—BO
WL, FILTER,
ASSY
Z-F
8 X
71
5—BA
IL,
FILTER
, ASSY Z-F10
X
9
N—BRAC
KET, FILTER MOUNTING 7375416
P—LINE, PR
IMER
FILTER TO CYLINDER
NO. 2 73 76038
119 . I ns ta l l
a t i o n of T
h r o t t l e
L i n k a g e
(fig. 1). Po
sition
three cross
shaft
sup
port brac
kets
(M
, f
ig.
75) on
the carburetor
e
lbow .
S e
cure wit
h plain washers
(T),
pla
in nuts (W), and
jam n
uts (V).
230
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fig. 74).
I
nstall the gov
ernor-to
-car
buret
or co
ntrol linkag
e assemb
ly. Sec
ure the
contro
l shaft
sup
port
bracket (
E) with
plain washe
rs, plai
n
nuts, and
jam nu
ts.
c.
fig.
76).
Inst
all the
control lever
support
assembly to
the
to p
right
(1-3-5)
side of
the access
ory
c
ase
and
secure
with sl
o tted n
uts and safety
wire.
C
onnect t
he
right-
hand-thr
ead-
ro d
-end ball
be
aring K, fig. 76
) to
the govern
or-contr
ol-shaft-
to-
v
ehicle lev
er Q).
Secure
wi
th dri
lled hex-
head bolt (J
), plain
washe
r (P
), slotte
d nut
(N)
, and cotte
r pi
n
M
). Con
nect
the
lef
t-hand
thread
ro
d-end-ba
ll bearing
Q , fig. 74) t
o the
g
overnor.
C
onnect
the
ri
ght- and left-h
and
thre
ad rod-en
d ball bearin
gs
(E)
and
(J)
to
the
carburetors
fig.
75).
Connect
the right-hand
thre
ad
rod
-end ball
be
arings
Q ) to the
center
cross
shaft
le
ver
A , fig.
75 ).
The ri
ght- and
left-hand
th
read ball bea
rings may
be
r
eversed
on
the turnbuck
les and
ro d
s.
231
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R Q
RA
PD 180576
120 I
ns ta l l a t i o n
of
S p a
rk Plug
Boos te r Co i l and
Ig n i t i o n
Har
n e s s
I
nsert
spark
plugs
in
their
holes with
inserting
w
rench 41-W-3306-5
00 (fig. 109
), using a
new spark
plug gasket.
With a deep
socket wrench, tighte
n t
o
200
to 225
Ib-in
torque (par.
167).
(fig.
110).
Install the
ignition
harn
ess
assembly. Secur
e
to
cylinder heads
Nos.
1,
2,
5,
and 6.
Fasten
t
he ignitio
n
harn
ess c
lamps (W) to the
c
arburetor
e
lbow
in
four
place
s. Secur
e
with
plain nuts
(Z)
and
j
am nuts (Y )
.
Place the
igni
tion harness adapters
on
t
he magnetos,
using new
ign
ition
harness-to-m
agneto
gask
ets (
F).
S
ecure
wit
h
lock wash
ers (E) and drilled
fillister-h
ead
scr
ews
(D). Install spark plug
cable with
terminal
s to
t
he spark plu g
s, using crowfoot wre
nch
41_W-871-65
(fig.
13).
(fig. 110)
.
Insta
ll
boo
ster coil with
filter
ass
embly (HH)
on its boost
er coil
a
nd filt
er
brack
et
assembly
(PP
). Secure with
lock
w
ashers (L) and
r
ound-head s
crews (N). Install short le
ft magneto
gro
und
c
able
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A—ELBOW, FLARED
TUBE, 90 DEG
7767517
B—LINE, FLEXIBLE, I
GNITION-HARNESS-TO-CARBUR
ETOR-
ELBOW,
LEFT
(2-4-6)
SIDE 7376059
C
—HARNESS, IGNITION, A
SSY 7346609
D—SCR
EW, DLD-FIL-HD
7338612
E—WASHER,
LOCK
131183
F—G
ASKET,
IGNI
TION-HARNESS-TO-MAGNETO
7338655
G—GASKET, ANNULAR
,
SPAR
K
PLUG
H—PLUG, SP
ARK,
14 M M
7 5 2 5 5 5 0
J—LEAD
, DETACHABLE, IGNITIO
N-MANIFOLD-TO-SPARK-PLUG
,
ASSY 7324
011
K — N U
T, PLAIN 225850
L—WASHE
R, L O C K
1
20217
M—CLIP ,
LOOP-TYPE, IGNITION-HARNESS-TO-CARBURETOR-
ELBOW-LINE 7403914
N—SCR
EW, RD-HD
132903
P—CLIP, L O O P
TYPE,
IGNITION-HARNESS-TO-CARBU
RETOR-
ELBOW-LINE
572914
Q— B
OLT, HEX-HD
7350199
R—WASHER, LOCK
120214
S—WAS
HER,
PLAIN
502245
T—CLAMP,
IGNITION
HA
RNESS, ASSY
7371917
U—LINE,
FLEXIBLE,
IGNITION-HARNESS-TO-CARBURETOR-
ELBOW, RIGH
T (1-3-5) SIDE 7348532
V—
ELBOW, FLARED
TUBE,
4
5 DEG 7767516
W—CLAMP, IGNITION
HARNESS
7403577
X—BRACKE
T,
CLAMP, IGNIT
ION HA
RNESS 7403579
Y — N UT,
JAM 107822
Z
—NUT, PLAIN
2 2 5 8 5 3
AA—NUT, HEX-HD 50320
9
BB—NUT,
PLAIN
2 2 5 8 54
CC—NU
T,
JAM
107
823
DD—BRACKET, CLAMP, IGNITION
H
ARNESS 7403578
EE—ELBOW,
P
IPE, STREET, 90 DEG 7410046
FF—NIPPL
E, TUBE
732 4013
GG—LINE,
FLEXIBL
E,
CARBURETOR-TO-MAGNETO, ASSY
74100
~49
H
H—COIL BOOST
ER, W/FILTER, ASSY 7725157
JJ_CABLE, GROUN
D, MAGNETO, LEFT SHORT
7353259
KK—CABLE,
GROUND,
MAGNETO, RIGHT,
LONG
7353260
LL—
LINE, FLEXIBLE, MAGN
ETO-TO-MAGNETO,
ASSY
77447
09
MM—MAGNE
TO,
ASSY 7539854
NN—W
ASHER,
PL
AIN
7744766
PP
—BRACKET, BOOSTER COIL
AND
FILTER, ASS
Y 7375434
Continued
233
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(JJ)
fr
om outer co
nnector of booster
to
outer magneto.
Install
long
right magneto
ground cable
(KK) from
inner connector of
booster coil
to inner magneto.
(fig. 110) .
Install the
carbu
retor-to-magne
to flexible line
assembly (GG),
the longe
r
m agneto-to-magneto
flexible
line
assembly
(LL), left
(2-4-6)
side
ignition-harn
ess-to-carburet
or-elbow flexible
line
(B), and
the ignition
harness to the
right
(
1-3-5) side
ignition-harn
ess-to-
carb
uretor-elbow
flexible line
(U)
.
Posit
ion and secure line
s in
the
ignition-h
arness-to-carbur
etor-elbow line loop-t
ype clips
(P)
on both sides of
engine
with screws,
lock
washe
rs,
an
d nuts
.
121. I n s t al l a t i on o f
G e n era to r
and Star t e
r
(fig.
47)
Insta
ll generato
r
and star
ter drive assem
blies (par
. 59).
A ssemble
the
generator
a
ssembly to
generator
drive
assembly
with a new
generator
and
starter
gaske
t
(E).
S e
cure
with
p
lain
washers (D),plai
n nuts (C), and
jam nuts
(B).
Note
position of g
enerator termina
l in figure
3.
Position start
er assembly
(Jack and
Heintz) as
shown
in
figure
3.
Install
starter
mounting
adapter
(L)
to
the
start
er drive assembly
(K)
using new
gen
erator
and
starter
ga
sket (E) and
special adapter
self-locking
nuts
(M)
.
P
osition
the
sta
rter to the starter d
rive assembly and tu
rn pinion to
secure
starter.
Note position of
starter pinion.
122. In s ta l l a t i on o f
Ex h a u s t
Manifold Sec t i on
s and
H o t s p o t
Manifolds
(figs.
16
and
112)
Install six
ne
w e
xhaust
man
ifold
gaskets on the cylind
ers
an
d
position the exhaust manifo
ld sect
ions on the right and
left
side
cylinder mount
ing
studs
. Secure
with
plain
washer
s
and
self-loc
king nut.
Install
hotspot manifold
assemblies to
t
he exha
ust
mani
folds
and ca
rburetor elbow with n
ew
g
askets.
S ecure with drille
d
hex
-
head
bo
lts and safet
y wire.
1 23
.
I ns ta l la t i
o n o f
E n g i n e Sh r
o u d and Oil Co
o le r
A s s e
m b ly
(figs.
16
and
17)
Position the
assembl
y on the accessory
case s
tuds
an
d on the
two c
rankcase locating
studs.
Install the four fan
rotor housing
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s
uppor
ts
C) w
ith plai
n wash
ers (B)
and dr
illed
hex
-head bolts
A
, fig
. 17).
Instal
l the p
lain was
hers
an
d self-l
ocking
n
uts to
the lo
cating
studs.
Instal
l plain w
asher
s
(B) and
slotted
n
uts (L
), secur
ing
the
s
hroud t
o
c
ylinde
rs.
Install
cotte
r
pin
s.
Install the
hotspot
inlet
and
exhaust
manifold
outlet
slot
c
overs
securi
ng w
ith hex-h
ead
bolts.
In
stall right
(1-3-
5)
and left
(2-4-
6) side
ex
haust
manif
old
cooling
a
ir
inl
et e
lbows
(H
)
and Z
) a
nd secu
re wit
h he
x-head
bolt
(
J).
Insta
ll
e
ngine
lifti
ng-eye
bracke
t (GG)
. Secu
re
with tw
o
plai
n n
uts (FF
), jam
nuts (EE
), and
two dr
illed
hex
-head
bol
ts
(JJ).
Inst
all
e
ngine
lift
ing
eye (K K
) into b
racke
t
throu
gh
the
shroud
slo t.
Insert
lifting
eye
drilled flat-head
pin (HH) and
e
ngine
lif
ting
eye spr
ing
(
DD)
w
ith its
washe
r
a
nd
cotter
p
in .
Insta
ll oil co
ntrol
housin
g i
nlet con
nector
s (N
) and t
rans
m
ission
c
ooler inlet
and con
trol hou
sing
outle
t connec
tor
B , fig .
86 ) o
n
the
oil
c
ontrol
ho
using, u
sing
new con
nector
gas
kets
(T)
.
Secure
with
their
plai
n was
hers,
plain
n
uts, an
d jam
nu
ts.
C
on
n
ect eng
ine oil
co
oler inlet
a
nd outl
et li
ne as
sembli
es (J
and
F,
fig
. 86), using
wr
ench 7
08373
8 fig
. 6).
124
In s
tal lat i
o n o f
Coo l in
g Fan
Ro to
r F
an C lu t
c h A s
s e m b l
y
and
Fan Ou
tlet Va
ne
H o u
s in g
Place
f
an rotor
and
fa
n cl
utch
assemb
ly fig.
7
3) on vertica
l
fan driv
e sh
aft
C
of fig . 82
).
S
ecure
wi
th slotte
d n
ut (P)
a
nd
cotte
r
p
in (N
). C
learanc
e betwe
en f
an roto
r b
lade
tips and
fan
roto
r
hou
sing
must
be 0.070-
inch m
inim u
m. Ins
tall
coo lin
g fan
driv
e ve
rtical
shaft co
ver
Q , f
ig.
7
3).
Secur
e with
its lo
ck wash
ers
and
screws.
Install
cooling-fan-outlet-vane
housing
Q ,
fig.
17) and se
cure
with
14 se
lf-lock
ing nu
ts (
R).
1
25 In
sta l la
t ion o
f
Cran
k c a s e Oi
l Fi l ler
P i pe a
nd
Brea t
h er
Tu b
es
( .
113)
Install
cra
nkcas
e
o
il fille
r pipe
ass
embly
(J) w
ith
a
n
ew
oil
fi ller p
ipe gask
et
(B).
Secure
to oil p
an
wit
h
dril
led
hex-
head
bolts
D )
and
safe
ty
w
ire. S
ecure
th
e filler
pip
e
bracke
t to the
shrou
d with
tw o hex-
head
w
ith inte
rnal-t
eeth lock
w
asher
b
olts
(
K). Ins
tall
the cr
ankcas
e breath
er tu
be (
E) with
new
hose
s and
n
ew or
serv i
ceable
hose
clamps
.
Instal
l the
breat
her tube
flam
e
arrest
or
assem
bly
M )
with
c
arbure
tor-to-
oil-fille
r
breath
er tube
23
7
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RA PD
(N),
us
ing new
carburetor
b
reather tube connec
tion hose
s (Q)
and
hose
clamps
(P). Fasten
the
tube
to
the
shroud.
Install
hose
and clamps
from breathe
r
tube to
the 90°
h
ose elbow
(R) on th e
carburetor. Install
oil control housin
g cover (P)
and rubber
oil con
trol
h
ousing cover
grommet (N)
(fig.
1
7). S
ecure with
hex-head
bolts
(J
of
fig.
17).
1 26.
I ns ta l la t
i o n of
H o t s p o t Outlet
H o u s i n g and Vacu
u m
Heat C o n t r o
l Valve
Inst
all housing
assem bly an
d
vacuum
heat
control
valve on
to p mounting pad
of th
e carbure
tor
elbow, using
a
ne
w
outlet
hou
sing gasket
(C). S ecure
with plain washer
s (D) and drilled
hex-head
bolts (E).
Install the top and bottom
hotspot outle
t
8
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A — E L B O W
, HOSE, 45 D E G 2088
03F
B—GASKET,
O I L FILLER
PI
PE 77
67802
C — GA G E ,
BAYONE
T
TYPE, OIL
LEVEL 7403
356
D — B O L T ,
DLD-HEX
-HD 7346710
E—TUBE, BREATHE
R,
CRANKCASE
7376005
F—ADAPTER,
HOSE 7
403524
G— HO S E , BREATHER
, OIL-FILLER-TO-T
RANSMISSION
7403389
H— C L A M P ,
HOSE 502
91 4
J—
PIPE, O I L
FILLER, CRANK
CASE, A
SSY
7376024
K — B O
L T, H
EX-HD, W/INT-TEETH
L O C K WASH
ER 7416584
L — B O L T, HEX-
HD, W
/INT-TEETH
L O C K
WASHER
7414584
M — A
R R E S TO R , FLAME
, BREATHE
R
TUBE
, A
SSY 7376056
N
—TUBE,
B
REATHER, CAR
BURETOR-TO-O
IL-FILLER
7376126
P — C L A M P
,
HOSE 502915
Q— H
O S E , CAR
BURETOR BREATHER
TUBE
CONNECTIO
NS
7403387
R — E L B O W
, HOSE
, 90
D E G
7376136
S — E L B
OW, PIPE, 90 D E G
7521299
T—VALVE,
AIR METERING, A S
S Y
7767922
U — -ELB OW, TU
BE, 90 D E G
7346726
V—LINE, BREATH
ER,
ACCESSORY
C A S E ,
RIGH
T (1-3-5)
SIDE
73760
33
W
—LINE, BREATHER,
ACCESSO
RY CASE, LE
FT
(2-4-6)
SIDE 73 7
6034
X — S C R E W ,
DLD-FIL-HD
7376062
Y—NUT, J A M 107822
Z—NUT,
PL
AIN 225853
AA—PLA
CE,
C L A M P ,
ACCESSORY
C A S E
BREATHER
LINE
S
7376031
BB—CLIP, A C C E S S O
R Y
CASE
BR
EATHER LINES
572904
C C — G A S K E T ,
BREATHER
LINE
ADAPT
ER
7410066
DD—NUT,
S L T D 77
03684
EE—PIN,
COTTE
R
13718
5
FF—W
ASHER,
PLAIN 73
76080
GG — S P R I N G ,
LIFTING EY
E 7376035
HH— -EYE, LI
FTING, A
CCESSORY
C
A S E
7376026
JJ—PIN, O L D ,
FL-HD, LIFTIN
G EYE 73 7
6019
KK—ADAPTER,
BREATHER
LINE,
ACCESSORY CASE
7376017
L L —
C O N N E C T O R ,
BREATHER LINE
75 2129
6
Continued
slot covers
(U and V, fig
. 17) and ho
tspot outlet housing bra
cket
(T).
S ec
ure
with their plain
washers
and hex-hea
d bolts. Secure
hotsp
ot outlet
housi
ng
bracket (T)
to the hotspot
outlet
h
ousing
with
its
p
lain was
her,
slo
tted
nut, and
safety
wire.
Inst
all
hots
pot
ou
tlet housing bracket (
M M). Secure to shr
oud w
ith its drilled-
head bolt
s, a
nd
to h
otspot housi
ng with its
self-locking n
ut. Con
n
ect vacuum he
at control lines
assembly (KK)
to the super
charge
r
hous
ing.
239
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t
s
s
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A—CA
RBURE
TOR, AS
SY 73
46 585
B—
ELBO
W, TUBE,
45 DEG
741004
1
C—LIN
E,
FL
EXIBL
E, CA
RBUR
ETOR-
TO-CAR
BURE
TOR
741004
5
D
— ELB
OW, ST
REET,
90
DEG, CAR
BURET
OR-TO
-MAGN
ETO-L
INE
7410
046
E—EL
BOW, FL
ARED
TUBE
, 90
D
EG 7767
517
F—LINE,
FLEXIBLE,
VENT, FUEL-PUMP-TO-CARBURETOR
7744710
G
—CON
NECTO
R, T
UBE 7
376 121
H
—ELBO
W,
P
IPE, 90
DEG
7521
2 99
J—
ELBO
W, FLA
RED
TUBE,
90 D
EG 776751
6
K—
NUT, JA
M 107823
L
—NUT
,
P
LAIN
2 2
5854
M —
WASHE
R,
PL
AIN
502204
N—B
RACKE
T, F
UEL FIL
TER 74
10083
P— E
LBOW
,
PIP
E, 90
DEG
77447
13
Q—CO
NNECT
OR, TUB
E
7
521296
R— BOLT,
DLD-HEX-HD
7346 718
S—FI
LTER,
FUEL,
ASSY
7
346 6 20
T
—LIN
E,
FLEX
IBLE, F
UEL-F
ILTER-
TO-FU
EL-PU
MP 7
410398
U
— CON
NECTO
R, TUBE
774471
5
V
—LINE
, FL
EXIBL
E, FUE
L-PUM
P-TO-
CARBU
RETO
R
734669
4
W—
GASK
ET FU
EL PUM
P 7
006868
X—P
UMP,
FUEL
, ASSY
74
10094
Y— E
LBOW,
FLA
RED
TUBE,
15 D
EG 7
539274
Z—
ELBO
W, FLA
RED T
UBE, 90
D
EG
734672
6
Conti
nued
12
7 Insta
l lat io n
o f
Fu e
l Fi l t
er
a
n d L in
es an
d Oil F
i l ter A
s s em
b
ly
I
nstall
fuel filte
r
bra
cket (N , fi
g . 11
4) to
the access
ory
case.
S
ecure w
ith plain
wa
shers (
M), pla
in n
uts
(L), and
jam
nu
ts
(K). Inst
all fuel
fil
ter asse
mbly
(S
) to t
he brack
et.
Secure
with
p
lain w
asher
(
M),
drilled
hex
-head bo
lt
(R), and
safe
ty wire.
Install
fuel-fi lter-to-fuel-pump
flex ible
line
(T).
I
nstall
fuel-
pump-
to-car
buretor
fle
xible line
(V
). Instal
l
ca
rbureto
r-to-c
arbure
tor f
lexible
lin
e (C).
Ins
tall
the oi
l filter
assem
bly
A ,
fig
. 35)
in its
housin
g in
t
he acce
ssory
cas
e, using
a
new
gas
ket.
Secure
w
ith pla
in
w
ash
ers, plai
n n
uts, a
nd j
am nut
s. In
stall the
ma
gnetic dr
ain plug
C,
fig. 35
)
wi
th a
new
drain
plu
g
gask
et
(D
) i
n the
acce
ssory
case
belo
w
the
oil
filte
r.
128
In s tal l
at ion o
f Ta
chom e
ter Trans
m i t ter
s
semb l
y
fi
g . 1)
Inst
all
t
he t
achom
eter t
ransm
itter a
ssemb
ly (FF
, f
ig . 54)
rig
ht
(1
-3-5)
side,
on the
cam
shaft g
ear housi
ng
tachom
eter tra
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m
itter drive adapter (BB
). Replace gasket. Secure with
plain
washers (JJ), pla
in
nuts
(HH), and jam nuts (GG).
Sect ion
XV
TE
STS A
ND
A D J U S T M E N T S
129 Oil
Pre
s s u r e
Oil pressure
can
be raised
(par. 82), but not
lowered, with the
t
ype
of
control valve used . If the oil pressure
at operating
tem
peratur
e is
to
o high at 2,000 rpm,
install a new oi
l
pressure con
trol
valv
e.
If
pressure is too low,
adjust it to 60 to 70
psi,
SAE
oil
at 180°
F.,
by
adding
up to three
plai
n
washers 7372030 in
the cap.
13
0.
T h
r o t t l e L i n k ag e
The adjustment of
the
t
hrottle
con
trol link
age
is
acco
mplished
to
a great extent in t
he
manufac
ture of the en
gine.
The
governor
co
ntrol-shaft-to-vehicle-lever rod (R,
fig. 76)
a
nd
the
cross-shaf
t-to-control-shaft rod (X, fig. 74), are
set
a
t pre
determined lengths at
the factory and
are
secured with pins
. The
adjustments n
ecessary for
the
effective operat
ion of
the
governor
an
d
carburetors
are outli
ned
b
elow and
in the
paragraph on gov
ernor adjustment
in the
pertinent
op
erators manual
.
6
. Adjust
for full travel
of
the
carburetor throt
tle plates in
the
foll
owing mann
er:
Disconnect
the
r
ight-hand
t
hread
rod-
end ball bearin
g
(L,
fig. 74) from
the control shaft-to-
governor
lever
(K, fig. 74). Lengthen
or shorten the cross-shaft-
to-carb
uretor-control-rod turnbuckles (G,
fig. 75)
as ne
cessary
to accomplish
full
tr
avel from the
full open stops on
the
carbure
tors
to
the
full
idle
stops
on
the carburetors.
Adjust
for
full
travel of the
governor
in the followi
ng manner: Make
certain
t
he
governor is extended to the
full
limit of
its
travel. Advance the
carburetor thr
ottle plates to
the full
open position
.
Next,
adjust
the length
of
the right- and
left-hand thread control-shaft-to-gov
ernor rod
(N, fig. 7
4 )
until
the
gove
rnor rocker arm (Y,
fig. 117)
clears the rocker
arm
stop p
in (H, fig.
117)
by
0
.010
inch.
Secure
all jam nuts on
the
throttle control
rods
a
nd on
the
control
shaft-
to-governor
rod .
131 A ccessor ies
Tests
and
adjustments
on accessories are outlined
in the
perti
nent operators
manual an
d
pertinent
technical manuals.
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S e
c t i o n X
VI. RU
N IN
T
EST
132
Pr
eparat
ion
f
o r R
u n i n
Install
th
e
engin
e to a dy
namom
eter o
r tr
ansmi
ssion.
Pre-
oil
the
engin
e by f
orcing
oil,
under pre
ssure,
into
the
oil syste
m.
T
his i
nsures
ad
equate
lubrica
tion
to the e
ngine pa
rts
until
th
e
en
gine
pu
m p
s
upply
reaches
th
em.
If no pre-o
iling
equi
pment is
availa
ble
fill all e
xterna
l
oi
l lines
and o
il coole
rs w
ith
the pro
per
grade
oil. See
that
an
a
dequat
e su
pply of
oil is
in
the oil
pan
.
A
djust th
rottle
linkage
as
outlin
ed in para
graph
130.
With
t
he
igniti
on switc
h
i
n th
e
OFF
positi
on r
otate the
cran
kshaf
t a
few
revo
lutions
with t
he
starte
r to mak
e cert
ain
that th
e engine
t
urns o
ver fr
eely,
wi
th
n
o pos
sibility
o
f
hydr
ostatic
lock—
engin
e
cylinders containing
liquid
gasoline).
The slip
clutch
in the
starter
is
design
ed so
no da
mage
to engi
ne parts
can oc
cur
under
th
is conditi
on. If
the
engin e
will
not tur
n
over with
the starte
r,
r
emove
one
spark
plu
g
fro
m each
cylind
er and
note
any
evide
nce
of
gasoli
ne.
R e
m ove liquid
from
the
cylin
ders by
rotat
ing
the
cr
anksha
ft
w
ith th
e e
ngine
turnin
g wre
nch 41
-W-90
6-130
fig .
7) or
the sta
rter.
133
E n g i n e R un in
A
rebuilt
en
gine
shou
ld
be
start
ed
and
run-in
in acc
ordanc
e with
one of the
follow
ing
s
chedul
es. If
any
pist
on
rings o
r cy
linders
on the
engi
ne have
be
en chang
ed or the
cyli
nders
honed
use t
he long run
-in.
If th
e pisto
n r
ings a
nd cyl
inder
bores
are
unchan
ged,
u
se the
s
hort run-i
n.
Per
iod
2
3
4
6
7
8
1
1 1
1 2
1 3
1 4
Minu
tes
3 0
3 0
3 0
3 0
3 0
3
3
3 0
3
0
3 0
1 5
1 5
1 5
1 5
E
PM
1
1
1 2
1 4
1
6
1 8
2
2
2
2
4
2 6
2
8
2 4
2
1 6
HP
a p r x
46
5 7
1 0 7
1 4 9
1 8 4
2 4 4
2 9 3
3
7 8
max
ma
x
max
max
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Period
1
2
3
4
5
6
7
8
M
inutes
15
15
15
15
15
1
5
15
15
R
PM
1,000
1,2
00
1,600
2,0
00
2
,200
2,400
2
,6 00
2,800
BH
P
(a
prx)
0
46
107
184
244
293
37
8
max
Oi
l c
onsu
m p
tion
m a
y
be
m
eas
ured
i
n t
he fo
llow
ing
m
ann
er:
(1)
Repair
all
oil
leaks.
(2
) R
un t
he
eng
ine
an
d sh
ut
it
do
w n
wh
en th
e
oil is
a
t
op
erat
ing te
mp
erat
ure.
(
3)
A
llo
w
1
0 mi
nute
s fo
r
fo
am on
the
oi
l
to set
tle.
eas
ure
the
oil le
vel.
(4) R
un
the
e
ngin
e for
h
our
s at
2
,800
rp
m a
nd
m
axi
m u
m h
orse
pow
er.
(5)
Sh
ut
do
w n
a
nd allo
w
10
m
inut
es f
or fo
am o
n
the
oi l
to
settle.
(6
) M
eas
ure t
he
amo
unt
o
f oi
l req
uire
d to ra
ise
the
oil to
its
ori
gina
l leve
l.
(7)
M ax
im u
m
allow
ab
le
o
il co
nsu
mpt
ion
is
g
allo
ns
in
1 1 / 2
ho
urs.
If it
ex
cee
ds th
at,
find
th
e caus
e. R
efe
r t
o
par
agr
aph
1
4Z(
2).
1
34.
Go
ve rn
o r
A
dju
stm
ent
fig .
116)
U
po
n
c
om p
le ti
on
of
e
ngi
ne
run-
in,
adj
ust g
over
nor
in
the f
ol
low
ing m
ann
er:
Wi
th t
he
thro
ttle
in
the
w
ide
ope
n pos
itio
n, a
nd th
e en
gin
e
o
per
atin
g at
f
ull lo
ad,
re
mov
e d
ust
ca
p (F
F) and
turn
th
e spee
d
ad
just
ing
scre
w (D
D)
un
til
the e
ngin
e
oper
ates
at
2,8
00 r
pm .
(C l
ock
w ise
ro
tatio
n
of
th
is sc
rew
inc
rea
ses
the
eng
ine
spe
ed.)
R
epla
ce th
e dus
t
cap a
nd ins
tall
s
afet
y w
ire.
W
ith
th
e t
hro
ttle in
th
e
w ide
open
position,
and
the
engine
op
era
ting
at
no
lo
ad,
adju
st th
e me
teri
ng
scr
ew
(K)
unt
il
the
en
gin
e
sp
eed is 2
,950
rpm
(c
lock
w is
e
ro
tati
on
of thi
s
scre
w d
e
crea
ses
the
engi
ne
spe
ed).
Ins
tall
t
he me
teri
ng
scre
w plug
(H)
and
a
ne
w w
ash
er (
J).
2
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S
A
U
N
S
W
A
M
O
H
C
P
M
E
U
H
G
H
P
S
A
U
N
S
W
A
M
O
S
C
P
F
G
1
D
D
E
S
O
N
T
N
L
O
A
A
U
N
H
|
G
H
P
V
V
S
A
U
N
S
W
-
A
M
O
S
C
P
F
G
2
2
R
F
U
L
O
A
•
U
O
l
R
P
1
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C H A P T E R
5
HYDRAULI
C GOVERNO
R
135. D e sc r i p t i
o n and
Data
The
mechanical hydr
aulic
typ
e governor is
mounted on
the right
(1-3
-5) side
camshaft gear housing
and
is
gear driven
from the camshaft drive
fuel pump and governor
drive bevel gear (BB, fig
.
4
5).
Its
function is to ma
intain
engine
speed
below
predetermined
limits,
regardless
of
engine
load.
The
governor
is
comprised of three basi
c systems. The
first
system
is
a
fly-ball
and race-type mech
anism, consisting of
four balls riding
between a
flat disk and a
conical
cover. Ax
ial movement of the
cover, c
aused
by
the centrifugal force
of
t
he rotating balls, actu
ates
the
secon
d or pilot valve
system. The pilot valve m
oves
back and forth over oil
passage ori fices, as gover
ned
by t
he
fly-
ball
system, thereby controlling
the
flow of
oil to the third or oil
pressure
system.
Oil
pressure,
supplied
from
the main
oil
gal
lery of the
engine,
produ
ces th
e
ampl
ified
energy
required to
actuate the
hyd
raulic piston, which
is turn controls the governor-
to-carburetor control
linkage. Desired engine speed
at
fu
ll
load
is obtained by adjustment
of
the metering screw
w
hich controls
the oil p
ressure in the
hydraulic system. Refer to
p
aragraph
134.
M
ake _________
______________
__ ovi
Type
______________________________-centrifugal
Rotatio
n
(mechanic
al)
________
______counterclockwise
Novi
part number
_______
______________NI-538
55D
136. D i s a s s e m b l y
of
Hydrau l i c G o v e r n o r
(fig.
1 1 6 )
Lift
parts
from
the
governor
bod
y with plug and sleeve
assembly
(G).
Remove
snap rings
and
separate
the remaining
parts.
The drive
shaft with lower race
assembly (V)
is
not dis
assemble
d .
R emove s
top
scr
ew and its washer from the
body and
with
draw oil distributing
valve (P), with
its
spring
and retaining
washer.
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e.
R e mo ve
the adjusting
screw dust cap (FF) from the body,
u n s c r e w
the
adjusting
s c r e w
safety
nut (EE)
holding
the speed
adjusting s c r ew (DD). R e m o v e the
nut
and screw and lift off
the dust
cap
washer (AA). R e m o v e the
t w o
cover fillister head
s c r ews (CC) and lock
washers
(BB) wh ich
hold adjusting screw
cover (Z)
to the
body.
Discard the
gasket.
R e mo ve the plug w hich covers metering screw
(K) from
the
body. Remove plug washer (J).
Turn
the metering s c r e w out
and
lift out the spring
and
s c r ew .
R e m o v e
the four dril led hex-head cap s c r ews (B) and lock
washers holding cylinder head
with
rocker arm and piston as s em
bly (D) to
the body.
Lift
out
the
cylinder head assembly and
r emove the
piston
spring
(F). Discard
the
cylinder
head gasket
(E).
/. Disassemble the cylinder head assembly (fig. 117) as follows:
(1) Drive
out
the grooved
pin
(W )
holding
the piston rod
clevis (X) to the piston
rod (G).
Pull the clevis
from
the
rod.
R e m o v e
the
piston
rod dust
seal
diaphragm
(E)
and the
piston
rod compre s s i on spring
(F). R e m o v e
the
rocker arm c levis expansion plug
(D)
from piston rod
c levis (X) and r emove rocker
arm shaft (C)
and its
bearing.
R e m o v e governor
rocket
arm
(Y)
and its
lubricating fitting.
(2) Pul l the piston rod
from
the
cylinder head
(J). R e m o v e
the
piston rod packing
l owe r gland retaining
ring
(P),
pi s ton rod
packing
l owe r
gland
(N),
piston
rod packing
(M), piston rod
packing upper gland
(L),
and
piston
rod packing compre s s i on spring (K). Discard packing.
R e mo ve cylinder head
bearing (V).
Do not
attempt to
r emove
rocker arm stop pin (H).
(3) Drive
out
the
grooved
pin holding
the
piston
assembly
(R)
to the piston rod. Pull
the
piston from
the
rod.
Do
not disassemble the piston guide pin (Q) unless obvious
damage makes replacement necessary.
137.
Clean ing Inspect ion
and
Repa i r o f
H y d r a u l i c
Gove rno r
a.
(1)
Clean
the
dust
seal
diaphragm with a c lo th dampened
with
soapy
water.
(2) W as h
all other
parts in
dry-cleaning so lven t
or
volatile
mineral spirits. Clean
all
ports
and open i ng s
with
probes, if necessary, and
b low
out
with air
to make sure
all
dirt
has been rem oved .
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t
o
4
A
—
T
N
L
U
H
C
T
Y
5
B
—
C
W
C
D
D
H
H
4
C
—
H
L
O
1
D
—
A
C
N
W
R
A
M
A
P
S
A
Y
7
E
—
K
C
N
H
A
7
F
—
N
P
S
7
G
—
W
P
U
A
S
V
A
Y
N
5
C
H
—
U
M
N
S
C
W
7
J
—
H
7
K
—
C
W
M
N
7
L
—
N
M
N
S
C
W
7
M
—
H
R
A
N
N
V
V
S
N
7
N
—
N
C
M
O
V
V
7
P
—
V
O
L
D
S
B
N
7
Q
—
N
S
N
B
R
5
R
P
1
R
—
N
S
N
T
H
B
A
N
7
S
—
A
N
B
T
H
7
T
—
B
U
7
U
—
A
N
1
V
—
H
D
V
W
L
O
W
R
A
Y
7
W
—
C
W
S
N
5
X
—
H
S
S
C
W
N
5
Y
—
K
C
7
Z
—
A
U
N
S
C
W
7
A
—
H
D
C
7
B
—
H
L
O
1
C
—
C
W
F
L
H
C
1
D
—
C
W
S
A
U
N
7
E
—
S
A
Y
7
F
—
D
7
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7
1
2
2
1
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(1) Check
the
castings for cracks
and
see that the mating
surfaces are smooth and free o f f laws .
(2) Check
the piston
rod for
scoring and wear.
(3) Check
the cylinder wal l s
for
s co re s and
abrasions.
(4)
Check
the
m o v e m e n t
of the piston
in
the cylinder
and
oil distributing valve
in the
bore.
(5)
Check springs
for
signs
of failure.
(6) Check
the dust
seal
diaphragm
for cracks,
deteriora
t ion , and obvious damage which
wou ld
make
it
unserv
iceable.
(7) Check
the thrust
ball bearing for
wear and defec t s .
(8)
Check
parts
to limits in
repair
and rebuild standards
(par.
166).
(1) Replace
all
worn or
defec t ive parts.
(2) If piston
rod
is scored, pull .pis ton
and
rod
from
head
and replace
packing
in cylinder head.
S m o o t h
pis ton
rod with c rocus c l o th .
(3)
Clean up al l scratches or abrasions o n cylinder w all s and
piston
with
crocus
clo th.
(4)
R e m o v e
all
burrs
from
oil
passage
open ings . The
edges
o f
these openings
should be smooth. Clean
them care
fully with
a scraper,
if necessary, and b low out with
air.
138. A s s e m b l y o f
Hydraulic
Gove rno r
Install the
rocker
arm
hydraulic
type
lubricating
fitting
(A,
fig. 117) in
the governor
rocker
arm.
Install the rocker arm
shaft
bearing (B)
in the piston rod
c levis
(X) and install the
rocker arm and shaft to the clevis. Install rocker
arm
clevis
ex
pansion
plug
(D).
Place a new or serviceable piston with guide pin assembly
(R, fig. 117) o n
the piston
rod
and secure with
grooved p in .
Install the cylinder head
bearing
(V,
fig.
117) in the
head.
Using new packing,
assemble piston rod
packing compres s ion
spring (K), piston rod packing upper gland
(L),
n e w
pis ton
rod
packing (M),
piston
rod
packing
l owe r gland
(N),
and pis ton
rod
packing
l owe r
gland
retaining
ring (P)
in
the
cylinder
head.
Install
piston and
rod
in
the cylinder head. Install pis ton
rod
compre s s i on
spring (F, fig. 117) and a
n e w
or serviceable
piston rod
dust
seal diaphragm
(E) o n the piston rod.
Place
piston rod
clevis
(X) o n the rod and secure with
grooved
pin
( W ) .
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See
that
the
ends
o f the
diaphragm are
seated
in grooves in
the
cylinder head and clevis.
Place
the piston
spring
(F, fig.
116)
in the
governor
body
and install the
cylinder head
with
rocker
arm
and
piston assembly
(D)
with
a n e w gasket i n pos i t i on as s h o w n in f igure
116.
Se cu r e
wi th
lock
washers (C),
drilled
hex-head
cap
screws
(B),
and
l ocking
wire .
/.
Install
the upper ball race (T, fig.
116)
o n the drive shaft
with l owe r
race
assembly
(V), placing
the
four actuating balls
(U)
in
their
recesses,
and
install the
ball
race
snap ring (Q).
Install the thrust ball
bearings
(S), thrust bearing snap
ring
(R),
and
oil
distributing
valve
(P) o n
the upper race.
Insert spring
in
valve and place valve
spring retaining washer (M) o n the end
o f
the
valve
compre s s i on
spring (N).
Then
insert
the
comple t e
assembly i n to the
governor
body and secure it
with
stop
s c r ew
(W ) ,
washer,
and lock ing
wire .
Install
speed adjusting screw (DD) in its cover. Place the
dust
cap washer
(AA)
over the
s c rew. Install
the
safety
nut
(EE) but do
no t
tighten
it.
Place a
n e w c ov e r
gasket
(Y)
o n
hous i ng
and
install cover assembly. Be sure the
dog
point on
end of speed
adjusting
screw (DD) seats
in
valve
spring retain
i ng
washer
(M).
Se cu r e the
cover
with two cove r
fi l l is ter-head
s c r ews (CC) and
lock
washers (BB). Install l o ck ing wire. Install
dust cap
(FF).
Dust
cap
is
lock-wired after adjustments are made
o n
engine.
Insert the metering screw
spring
(L)
and
the
metering
s c r e w
(K).
Do not try to adjust
setting
at this t ime. Install
metering
s c r e w plug
(H) with a
n e w plug
washer
(J).
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CHAPTER 6
R
EPAIR
AND R EB U I L D
STAND
ARDS
139 General
The
repair and rebuild stan
dards included
herein
give the
minim
um,
maxim
um, and key
clearances of new
or
rebuilt
parts
.
They also give
wear limits which
indicate tha
t point to
which a
part
or
parts
ma
y
be worn
before replacemen
t,
in
order
to
rece
ive
maximu
m service with
minimum
r
eplacement.
Normally, all
parts
which
have
not
been
worn
beyond
the
dimensions
shown
in the
Wear limits
column
or damaged
from
corrosion
w
ill
be
appro
ved
for s
ervice. An aste
risk (*) in
the
Wea
r
limits
column
indicates that
the part or
parts should
be
replace
d
w hen
w
orn
b
eyond the
limit
s
g
iven in
the
Size
s and
fits
o
f new
parts
col
umn.
In th
e
S
izes
and fits
of
new par
ts
column, the
l
etter
L indicates a
loose fit (cle
arance)
a
nd
the
l
etter
T
indicates
a
tigh
t fit (interf
erence).
14
0
A c c e s s o r y
Case
and S u b a s s e m
bl ies
Mating
Bo res and
Pi lo ts
(pars
. 57 and 58
)
Fig.
No.
118__
Eef.
Itr.
M
P
M
-P
Point
of
me
asurement
ID of pilot
bore in ac
c
essory case.
Pilot O D
of drive a
s
sembly.
Fit
of drive assem
bly
in
case
.
Sizes
a
nd fits of
new parts
5.6 8 6 5
to 5.6885
_ _ _ _
5.6875 to 5.68 9 5
_ _ _ _
0.0010T
to 0,0030
T_.
W
ear
limi
ts
5 . 6900
5.6860
0.0045L
Fig.
No.
118
R
ef. Itr.
J
G
G-J
Point of
measur
ement
cessory case.
Pilot
O D
of
adapter
Fit
of ada
pter in case_
Sizes
and
fits of
new par
ts
4
.8125 to 4.81 6 5
_
4.806 0
to 4.8100
0.0025L
to
0.0105L
Wea
r
limits
5
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c .
S
No
.
18
Ref.
H r.
D
D
TT
Point of m
easur
ement
ces
sory
case
.
Sizes
an
d fits
o
f
n
ew
par
ts
4.2
500
to
4.25
10
4.2
485 to
4.249
5
0.0
005L
to 0.0
025L
Wear
limits
Fig
.
No.
118
12 5
R
ef.
Itr.
C
p
C
-p
Poin
t of m
easure
ment
ce
ssory
case.
Pil
ot O D
of a
dapte
r
Fit
o
f a
dapte
r
in
case
Siz
es a
nd fits
o
f
new p
arts
2
.8 750
to 2
.8 760
_
2 .873
5 to
2
.8745
0.0
005L
to 0
0025L
We
ar
limits
Fig.
N
o.
118
Ref.
It
r.
N
Q
N-Q
Poin
t of
measur
ement
I
D o
f
pilo
t
bo
re in
ac
ces
sory
case
.
Pi
lot
O
D of h
ousin
g___
Fit
of hous
ing
in
case_
S
izes an
d
f
its
of
new
parts
2
.1250
to
2.12
60 ___
_
2 .1
237 t
o 2 .124
7
0
.0003
L to 0.0
023L
We
ar
limit
s
2
.1 272
2
.1225
0 00
35L
/.
Fig
.
No.
118
Ref.
Itr
.
H
F-H
Poi
nt of m
easur
ement
ID
of pilot
bo
re in
ac
cess
ory case
.
Pil
ot
O D o
f
h
ousin
g.
Fit
o
f
hou
sing
in
case-
Sizes
and fi
ts o
f
new
parts
2 .1
250 to
2
.1260
2
.1237
t
o 2
.1247
__
__
0.0
003L
to 0.00
23L
W
ear
limits
2 .127
2
2.12
25
0.0
035L
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Fig.
No.
ft
Ref.
Itr.
B
A-B
Poin
t of measu
rement
sory case.
Pilot
O D
of filterhea
d
Sizes
and
fits
of
new
parts
1.5000
to 1.5
02 0
1.4950
to 1.4990
0 0010L
to
0 0
070L
Wear
limits
Fig.
No.
11
8_
_
Eef
. Itr.
K
L
K-L
Point of
measurement
sory
case.
O D
of
line
Sizes and
fits of
new par
ts
0.8745 to 0.8755
_
0.870
0
t
o
0
.8740 _
0.0005L
to
0 0055L
W
ear
limits
FiK.
N
o.
119 _
127
_
Ref. Itr.
Q
F
F-Q
Point
of measurement
Pilot ID of accessory
ca
se flange.
Pilot
O D
of
diffuser
f
lange.
Sizes and fits
of
new parts
16.375
to
16.37
8 _
16.371
to
16.374
_
0.001L to 0.007L
Wear
lim
its
Fig.
No.
119
Ref. Itr.
P
K
K-P
Point of
measurem
ent
ID of
pilot
bore
i
n
ac
cessory case.
Pilot O D
of
liner_
Fit of liner in case
Sizes and f
its of
new parts
3.3750
to 3.3760 _
3.3735 to 3
.3745
0 0005
L
to
0 0025L
W
ear
limits
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Fig.
No.
11
Eef. Itr.
E
Q Q
R Q Q
Point of measurement
sory case.
Small O D
of
housing__
Sizes
and
fits of
n
ew parts
2.4375
to
2.4385
2.4395
to 2.4410
0.0010T
to
0.0035T
Wear
limits
Fig
.
No.
119
Ref. Itr.
T
X
T-X
Point of
measurement
cessory case.
Pilot
O D
of
adapter
Sizes and
fits
of
new parts
4.62
50
to
4.6270
4.6
230
to
4.6240
0.0010L to 0.0040L
Wear
limits
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m.
Fig
.
N
o.
11
Ref. I
tr.
D
n Q
Point
of
measuremen
t
acces
sory case.
OD
o
f dowel pin
Fit of
pin
in c
ase_
Sizes a
nd
fits
of
new parts
0.3125
to
0.3135
0.3
126
to
0.3128
0.0009L to
0.0003T
Wear
limi
ts
14
1.
Ac c
esso r y
C
as e D
r i v e Gearing
(pars.
57
and
5 8)
Fig.
No .
11Q
119
Ref.
Itr.
H
J
H-J
ER
H-ER
Point of
measurement
OD of bearing
s _ _
ID of fan
drive gear
outer
b
earing
liner.
Fi
t
of
bearings in
out
er
bearing
liner.
ID
of
liner
in acces
so
ry case.
Fi
t of b
earing
in
ac
cessory
case liner.
Siz es and fits
of
new p
arts
2.834 1
to
2.8346
2.8345
to
2.8353 _ _ _ _
0.0012L
to
0.0001T
2.8345 to
2.8353
_
_ _ _
0.0012L to
0.0001T
Wear
limits
2.8333
2.
8361
0.0020L
2.83
61
0.0
020L
6
.
Fig.
No.
119
_
_
Eef.
Itr.
M
L
L-M
Point of m
easurement
Large OD
of
shaft o
n
fan drive gea
r.
ID
of
fan
drive
gear
bearings
.
Fit of shaft
in
be
ar
ings.
Sizes and
fits
of
new parts
1.3
779 to 1.37
84
_ _ _ _
1.3775
to
1.3780 _ _ _ _
0.0001L to 0.0
009T
Wear
limits
1.37
75
1.3784
0.0
005L
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Fig.
No.
119
Eef. Itr.
N
RR
N-RR
Point
o
f measurement
Large O D
housing
inner bearing liner
in accesso
ry case.
Fit
of
housing in
liner
Sizes and
fits
of
new parts
2.8070
to 2.8
170 _
2.8345 to 2.835
3 _
0 0175L
to 0 0283L
Wear
limits
Fig.
No.
120 _ _ _
Ref.
Itr.
u
w
u w
Point
of
measurement
O D of
large drive
gear
r
oller bearing.
Large
ID
of
lin
er
in
accessory
case.
Fit
of
bearing
in case_
Sizes
and
fits of
new parts
3.9364 to
3 .9370 ___ _
3.9365
to
3.9375 _ _ _ _
0 0011L to
0 0005T
Wear
l
imits
3.935
5
3.9384
0.0020L
Fig.
No.
119
Eef.
Itr.
M
M
NN
MM
-NN
Poin
t
of
measurement
O D of
bearing
Small ID of
liner in
accessory
case.
Fit of bearing
in
liner
Size
s and
fits
of
new parts
3.
5427
to 3.5433
_
3.5428
to
3.5438
_ _ _ _
0 0011L to 0 0005T
W
ear
limits
3.5423
3.5442
0 0015L
/.
Fig.
No.
120
_ _ _
119
Ref.
Itr.
X
LL
X-
LL
Point
of
measurement
Small .OD
of
shaft
on
gear.
I
D of
small
drive
gear
roller bearing
.
Fit
of
g
ear
in bearing.
Sizes
and
fit
s
of
new parts
1.967
8
to
1.9684
1.9680
to
1.9685__. ._
0 0007L
to
0 0004T
Wear
limits
1.9675
1 .9
688
0.0010L
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R
P
1
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/.
Fig.
No.
120.
19 (
1
Kef. Itr.
c-x
Y
T
T-Y
Point
of mea
surement
ID
of drive
gear
bea
r
in
g space
r.
Large
OD of
shaf
t on
gear.
rolle
r bea
ring.
Sizes and fits
of
new parts
1.9690
to
1.9750-
—
0.0006
L to 0
.0 072 L
2 .1660
to
2.1666
—
2 .1
6 49 to
2 .1 6
54 __
0.0006 T
to
0.0017T
We
ar
limits
Fig
.
No.
120
120
__ _
120_
120-
121
Be
f. Itr.
M
N
M-N
Q
E
p
N
N-
P
M
N
Point of
measu
rement.
Small
ID
of ge
ar
OD
of
starter
driven
bevel
gear ball bear
in
g.
Fit o
f gear on
shaft
P
ilot
OD on
ge
ar _
driv
e
gear.
Fit
of
starter
gear
in
power ta
ke-off g
ear.
La
rge ID
of
g
ear_
_
bev
el gear bal
l
be
ar
ing.
Fit of be
aring i
n ge
ar
Desired backlash
(at
m
e n
di
m ension
)
with
starter
driv
e
be
vel gear.
To
tal back
lash
_
_
Sizes and fi
ts
of
ne
w parts
1.53
10 to 1.53
2 0 _
1.5300
to
1.5306
_ _ _ _
0.00
04L to
0
.0020L
4.62
35 to
4.6
245
_ _
4.6250
to
4.6
26 0
_ _
0.0 005T
to
0.0 02 5L
2.67
74
to
2
.6784 __
2.67
6 7 to
2 .6
772
_
0.000
2 L t
o 0.001
7L
0.0 080
to
0.012 0
_
I
0
.0048 to 0
.0152
Wear
limi
ts
1.5
32 6
1.5294
0
.0 020L
0.0191
259
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Fig.
No.
1
1Q
Ref. Itr.
KK
PP
K
K-PP
Point of
mea
surement
O D
of bearing
-
ID
of
liner
in
acce
s
sory
ca
se .
Fit
of
bearing
in l
iner_
Sizes and
fits
of
n
ew parts
1 8502 to
1 8504_
1 8502 to 1 8
507 ____
0.0005
L
to
0.0002T
Wear
limits
1
8497
1 8512
0.0010L
Fig.
No.
120__
120 _
121
Ref.
I
tr.
G
H
G-
H
E
F
E F
U
-V
Po
int
of measurem
ent
O D of
shaft on gear__
ID
of
ac
cessory driv
e
idler gear.
Fit of
magneto
gear in
idler
gear.
ID
o
f gear __
b
evel gea
r bearing.
Fit
of
bearing
in gear_
Desir
ed backlash
at
mea
n dim
ension)
with mag
neto driven
bevel gear
.
Total
b
acklash _
Sizes and
fits
of
new par
ts
1 6240
to
1
6 250 ____
1 6250
to 1 62
60 ____
O O O O O L
to
0.
0020L
1 1562
to
1 157
2—
1 1580
t
o 1 1590_ ._
0.0008T
to 0.00
28T
0 0080
to
0
0 120_
0
0060
to
0.
0140-
We
ar
limits
1 6230
1 6270
0.0030L
0 0179
Fig
.
No
.
120
-
120-
Eef.
Itr.
D
D
-J
A
A-
J
Point
of
measur
ement
O D
of shaft
ID
of magneto drive
bevel ge
ar
b
earing.
Fit
of
shaft
in
bearing.
ID
of shaft be
aring in
acce
ssory
ca
se.
Fit o
f shaft
in
bearing.
Sizes
and fits of
new parts
0
9988 to 0 999
3—
1 0020
to
1
0030
0.0027L to 0.0042L
0 9995
to
1 0005_
-
0.
0002L
to
0.0
017L
Wear
limits
0 99
70
1
0048
0 0060L
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Fig.
No
120_
Ref. Itr.
S
B
B
-S
Point of measurement
ID of liner
in acces
sory
case.
Fit of gear in liner __
Sizes and
fits
of
new parts
1.6220 to 1.6230 _
1.6 250 to
1.6260
____
0.0020L to
0.0040L
W
ear
limits
1.6200
1.6280
0.0060L
Fig.
N o.
120
Ref. Itr.
L
K
K-L
G H
Point
of measurement
O D
of
bevel
gear
ID of camshaft drive
idler gear.
Fit
of
bevel gear in
idler gear.
mean dimensio
n
with camshaft driv
en idler bevel gear.
Total
backlash
Sizes and fits of
new parts
1.3115
to
1.3120
1.3125 to 1.31
35
____
0
.0005L
to 0.0020L
0.0080 to 0.0120 _
0.0058
to
0.0142
Wear
limi
ts
1.3095
1.3155
0.0040L
0.0181
__. .„..._....
._... _
..___ ._
___ __
RA
PD 8 586:
261
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I
O
R
P
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142. Accesso ry
Cas e Diaphragm and
Impelle
r
S ha f
t
A s s em b l y
(par. 58)
Fig.
N o.
119 ___
119
119 ___
Eef. Itr.
B
F
B-F
C
D
C-D
C C
EE
CC-EE
Point
of
measur
ement
ID o
f
large
liner
in
diaphr
agm.
O D of
impeller driv
e
gear roller
bearing.
F
it
of bear
ing
in liner_
ID
of
dowe
l hole in
di
aphragm.
O D of
dowel pin
Fit of
pin in hole
I
D
of
small liner
in
diaphragm.
O D of
impe
ller driven
gear
uplex
ball
bear
ing.
Fit
of
bearing
in liner_
Sizes
and
fits
of
new
parts
2.83
45 to 2 .8353
2.834
1 to 2.8346 ____
0.0012L
to
0.0001T
0 .3
11 5 to
0 .3125
0.31 2 6 to
0 .3128
0.00
01T
to
0.0013T
1.85
02 to 1.8507
____
1.850
2 to 1
.8504
0.0005L
to
0.0002T
Wear
limits
2
.8361
2.8333
0.00
2 0 L
1.8512
1.8497
0.0010L
Fig.
N o.
1
19
11 9
Ref. Itr.
BB
C C
B B
C C
AA
A
A
AA
Point of measurem
ent
ID
of
small liner
in
diaphragm.
ID
of
housing
O D of
impe
ller drive
oil
seal.
Fit
of
se
al in housing
Sizes and fits of
new par
ts
1.8470
to
1 .8
490
1.8502 to
1.8507
0.0012L
to
0.0037L
1.6240
t
o
1.6250
1.6260
to 1.6280
0.001
0T to
0.0040
T
Wear
limits
263
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Fi
g.
N o
1Q
1 1 Q
127 _
1 1 Q
1 1
9
1 1 9
Ref. I
tr.
G
G F
F
G
G-FF
Z
Z-FF
G G
DD
DD
-GG
HH
GG-HH
Po
int of measu
rement
gear
.
M
inor
ID of splin
e in
impell
er.
i
t of gear
in
im
peller.
gear.
M
ajor ID
of
spline in
impell
er.
Fit
o
f gear i
n im
peller
Fit of space
r on major
O
D
o
f
gear
spl
ine.
O
D
of
bear
ing s
urface
on
gear.
ID o
f impel
ler driven
g
ear uple
x ball
beari
ng.
Fit of bal
l bea
ring o
n
gear.
ID
of imp
eller driv
en
gea
r
roller
bearing.
Fi
t roller b
earing
on
gear.
Sizes
and
fits of
new
parts
0 6140
to
0 6200
0 6365 to
0 6375
0.0165L
to 0 0235
L
0
7570
to
0 7 5
80
0 759 0 to
0
.7600-
0
0010L to
0 0030L
0 7 6 1 0
to
0 7620
0 0030L
to
0 00
50L
0 7 8
7 3 to 0 7
87 5
_
_ _ _
0 7 87 2 to
0 7 874 _ _ _ _
0
0001L
to 0 0003T
0 7 87 2 to
0 7874
_ _ _ _
0 0001L to
0 0003
T
Wear
lim
its
0
.7871
0
7 87 6
0 0003
L
0 7 8
7 6
0 0003L
Fig.
N o
119
Re
f. Itr.
G
E
E-G
Poin
t of measu
rement
O
D
of
bo
th
sha
fts on
gear.
ID
of im
peller driv
e
ge
ar
roller
bearin
gs.
Fit of bearing
s on
gear.
Sizes and fits
of
new
parts
1 3 7 7 9 to
1 3784
1 37
7 5 to 1 37 80
_
_ _ _
0
0001L
to 0 0009T
Wear
limits
1.3775
1 3
7 84
0 0005
L
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143. Sta r te r Drive
Assemb ly
(par. 58)
Fig
.
No.
118 ___
Eef. Itr.
D
n
D
n
P
M
M-P
Point
of
measurement
Small ID of
adapter
Small
O D of
starter
drive
bearing
liner.
Fit
of liner
in
ad
apter.
Pilot ID of adapter
Pilot O D of starter
mounting adapter.
adapter.
Pilot
O D of adapte
r..-
ID of pilot bore
in
ac
ces
sory
case.
Fit of adapter
in case-
sizes and fits of
new
parts
3.500
to 3.502
3.497 to 0.3499-
_
0.001L to
0.005L
4.125
to
4.127
4.120 to
4.122
0.003L to 0.007L
_
5.68
75 to 5.6895
_ _ _ _
5.6865
to 5.6885__
0.0010T to 0.0030L
Wear
limLs
5 .6860
5.69
00
0.0045L
Fig.
No.
122
122
122
_
122
_
_
Ref. 'itr.
c
B
B-C
E
G
E-G
J
E-J
L
E-L
Point of measurement
Small ID
of
liner
O D of
starter jaw
ball
bearing.
Fit
of
ball
bearing
in
liner.
OD of outer starter
jaw bearing
spacer.
Fit
of
spacer i
n
liner
O D
of starter jaw
roller bearing.
Fit
of
roller
bearing
in liner.
Sizes and
fits
of
new parts
3.1235 to
3 .1265
3.128
0 to 3.1320
0.0050T
to
0.0085T
3 .1496
to
3.1 503
3.1491
to 3 .1496__
O . O O O O L
to 0.0012L
3.1380 to
3.1440 _
0.0056L
to
0.0123L
3 .1491 to 3.1496
__
O . O O O O L to
0.0012L
Wear
limits
3.1511
3.1483
0.0020L
3
.1483
0.0020L
265
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R
P
D
8
Q
5
8
8
I
N
R
O
8
5
8
9
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Fig.
No.
122
199
122
Ref. Itr.
F
H
F-H
F
K
M
F-M
Point of
measurement
ID of
starter jaw ball
be
aring.
Fit of bal
l bearing
on
jaw.
jaw bearing spacer.
ID
of
starter jaw
roller bearing.
Fit of roller bearing
on
jaw.
Sizes and fits
of
new
par
ts
1 .5748
to
1 .5753
1
.5743
to 1.5748
_ _ _ _
O
. O O O O T
to 0.0010T
1 .5910 to 1.5970- _
0.0157L
to
0.0222L
1 .574
3
to 1 .5748__
O . O O
O O T to 0.0010T
Wear
limits
1 .5738
1.5758
0.0010L
1.5758
0.0010L
Fig.
No.
12 2
12 1_
12 1_ _
Ref.
Itr.
N
F
F-N
M-N
N-P
Point of
measurement
ID
of
gear
_
O D of
starter jaw_ _ _ _
Fit
of
gear
on
j
aw_ _ _ _
mean d
imension)
with
st
arter
driven
bevel gea
r.
Total bac
klash
Desired backlash (at
mean dim
ension)
w
ith
scave
nger
oil
pump bevel
gear.
Total
backlash
Sizes and fits of
new
p
arts
1 .5755 to 1.5765-
1.57
48
to
1 .5753 ____
0.0002L
to
0.0017L
0.0080
to
0.01 20
_
0.0048
t
o 0.0152-
0.0080 to 0.012
0
0.0060
to
0.0140
Wear
lim
its
1.5775
1.5738
0.0027L
0.0191
0.0179
267
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144 Generator Dr ive
Adapter Assemb l y
(par. 58
Fig.
No.
124
124 _
123
118
Ref. Itr.
B
A
A R
P
Q
P
r >
B
A
A-B
G
J
G-J
Point
of measurement
ID of oil
seal bore in
adapter.
O D
of oil seal
Fit
of
seal
in adapter
adap
ter.
Pi
lot ID
of adapter
Pilot
O D
of flange
on
generat
or assembly.
adapter.
Pilot
O D
of a
dapter
cessory ease.
Size
s and fits of
new
parts
1.999 to
2
.001
2.002
to 2.0 06
0.001T to 0.007T
0.250
0 to 0.2510
0.2501
to 0.2503
0 0009L
to
0.0003T
4.125
to 4.127
4.120
to 4.1 22
0.003L to 0.007L
4.8060 to 4.8100
4.8125
to 4.8165
0.0025L to
0 0105L
W
ear
limits
Fig.
N o.
124
121
Ref. Itr.
D
C
C-D
-p
-K
Point
of measurement
O D of
g
ear
ID
of generator drive
adap
ter.
Fit of
gear in adapter.
mean dimension)
with
generator driv
e
bevel
gear.
Total
backlash___
Sizes and
fits
of
new
parts
1.
8720 to 1.8730
1.8750 t
o
1.8760
____
0 0020L to 0 0
040L
0.0080 to
0.0120
0.0042 to 0 .
0158
Wear
lim
its
1.8700
1.8780
0
.0060L
0.0197
268
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Fig.
No .
124__
121
Ref.
Itr.
J
K
J K
Q-R
Point of measureme
nt
OD
of bevel
gear bear
in
g.
T ^ i t r > f TIPS Tin in P P F I i*
mean
dimension)
with
gene
rator
driv
e
n bevel gear.
T
otal backlash_ _ _
Sizes
a
nd fits of
new parts
1.1875 to
1.1890__
1.1900
to
1.1910
__
0.0010T to 0.0
035T
0.0080 to 0.012 _
0.0042
to 0.015 8 _ _ _ _
Wear
lim
its
0.0
197
Fig.
No .
12
4
__
124
_
R
ef.
Itr.
L
H
H-L
F
E
E F
Point
of measure
ment
I
D
of
bearing (after
assembly)
O
D
of
bearing sur
face
on
gene
rator
drive
bevel gear
shaft.
Fit of
gear in
bearing.
through b
earing.
OD of
dowel
pin _
Fit of t)in in bearin
g
Sizes
a
nd fits of
new
parts
0.
9995
to
1.00
05
0.9980 to 0.9985
0.0010L to 0.0
025L
0.1180 to
0.1230
0.1235 to 0.1265 _
0 .
0005 T to
0.0085T
Wear
limit
s
1.0
025
0
.9960
0.0045
L
Fig.
No .
12 4
124_ _
Ref.
Itr.
M
G
G -M
N
Q
N
-Q
Point of m
easurement
bev
el gear sha
ft.
bracket.
Sizes and fits
of
ne
w
parts
0.6870
to
0
.6880
0.6865
to 0.6870 . .
O . O O O O L to
0.0015L
0.2480 t
o
0.2
4 90
0.2501
to
0
.2503
0.0011T to 0.00
23T
Wear
limit
s
269
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145 Mag
neto Dr ive
Hous ing Assem
b ly
(
par. 58)
Fig.
No.
19^
I9
t;
Ref. Itr.
B
A
A-B
J
T
Point
of measuremen
t
ID
of
ad
apter
O
D of oil seal
a
dapter.
Size
s and fits
of
new
parts
2.1240
to
2
.1260
2 .1
270
to
2.
1310 -
0
.0010T to 0.00
70T
0.2500
to 0.2 5
10 -
0.2501
to 0.2 503
0.0009L to 0.00
03T
Wear
limit
s
Fig.
No.
125 __
1
21
Ref.
Itr.
V
D
D-V
S-T
Point
of measu
rement
O D of
gear _
_
ID of
driven idler
beve
l
g
ear ad
apter.
Fit of gea
r in adapter
-
Desired bac
klash (a
t
m
ean
dimension)
with m
agneto driv
e
idler bevel
gear.
Total back
lash
Sizes and
fits of
new
parts
1.6230 to 1.623
5 _ _ _ _
1.6250
to
1.
6260 _ _ _ _
0.0015L to
0.0030L
0.0080 to
0.1
20
0 .0
065
to C.0135
____
Wear
limit
s
1.62
10
1.6280
0.0050
L
0
.0159
Fig.
No.
125 __
125
Ref. Itr.
G
E
E
G
H
Point of measurement
ID
of bore
in housin
g
O D of ma
gneto drive
n
idler eve
l
g
ear
adapter.
Fit of a
dapter in hou
s
ing.
ID of
bore
i
n
housi
ng
_
Sizes and fi
ts of
new
parts
2.1875
to 2.1885
2
.1860 to 2.1
870 _
0.0005L
to
0.0025L
1.3 7
50 to 1.
3770
_
_
W
ear
limits
1.3
787
271
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c .
Co
nt'd.
Fig
.
N
o.
12
5
__
125
_
11 8
__
Re
f. Itr.
F
H
T
U
T-U
K
J
J
K
D
E
D-E
Poin
t of me
asureme
nt
OD
of
magneto
ge r
Fit
of magne
to
gear
in h
ousing
.
I
D o
f bore
in
ho
using
O
D o
f
ma
gneto
drive
id
ler bevel
gea
r.
Fit
o
f
drive
idler
g
ear
in hou
sing.
ID
of
dowel hole
in
hou
sing.
OD
of
dowel
pin-
Fit
of
pi
n
i
n
housin
g-
Pilot O
D
of
h
ousing
_
ID
of pilot
bore
in
a
c
c
essory
case.
Fit
of
housing in case
Siz
es
and fits of
new parts
1.3720
to
1.3730 ____
0.0020L
to 0
.0050L
1.
7500
to 1.751
0
1.7480
to
1.748
5
0 00
15L
t
o 0
.0030L
0.2 490
to
0
.2500-
0.250
1
t
o
0.25
03
0.00
01T
to 0 0
013T
4.248
5 to 4
.2495
_
4.2500
to
4.
2510
0 0005L
to
0 0025L
W
ear
limits
1.3703
0 00
67L
1.7
530
1
.7460
0.00
50L
Fig.
N
o.
12 5
125
__
Re
f.
I
tr.
L
L-Q
R
M
M -R
Point
of measure
ment
O
D
of spa
rk ad
vance
g
overno
r
coupl
ing
beari
ng on
shaft.
ID
of bearin
g
in spar
k
adv
ance g
overno
r
coupl
ing.
Fit
of c
ouplin
g on
sha
ft.
OD
of
spark
adva
nce
gov
ernor
bearing
on
shaft
.
ID
of
bearing
in
spark
advan
ce go
vernor
assemb
ly.
Fit
of gover
nor on
shaft
.
S
izes an
d
f
its o
f
n
ew p
arts
0.8715 to
0.8
725
0.87
45 to 0.875
5 ___
_
0
0020L
to 0.0
040L
0.8
715 to
0.8725 ___
_
0.8735
to
0.8740
____
0.0010L
to
0 0025
L
Wear
lim
its
0.8695
0.8
775
0
0060L
0.8695
0.8760
0 004
5L
7
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Cont d.
Fi
g.
N
o.
125
121 _
Eef. Itr
.
S
N-S
u-v
Point of
measurement
O D of ada
pter bear
ing
on
shaft.
ID of m
agneto d
riven
b
evel gear a
dapter.
F
it of shaft
in
adapt
er-
Desired
backlash
a
t
mean dim
ension)
with magn
eto drive
bevel gear.
T
otal backlas
h_
_ _
Sizes a
nd fits of
new
parts
1.4975 to 1.49
85_,__
1.5000
to
1 .50 10 _ _ _ _
0 00
15L to 0 003
5L
0.0080 to 0.012
0 _
0.0060
to 0.0140
_ _ _ _
W
ear
limits
1.4955
1 .5 030
0.0055L
0.0179
Fig.
No.
125 _
1 18 _
Ref.
Itr.
P
c
C-P
Point
of
measure
ment
Pilot O D of
adapter
accessory
case.
Fit of adapter
in case
Sizes and fits
of
new
parts
2.8735
to 2.874
5 _
2.8750 to 2
.8760
_
_
0 0005L
to 0
.0025L
Wear
limits
14
6.
Gov
ern o r
Dr ive Fue l
Pump
an
d
Cams
haf t Dr i
ve Hou
s ing
Fig.
No.
1
26_ _
126
_ _
US
_ _ _
Eef. Itr.
A
W
A-
W
N
H
H
-N
N
N-Q
P
oint of
measurement
Pilot ID
of housing
Pilot O D o
f govern
or
body.
Fit of b
ody in
hou
sing
Pilot
ID of housing
_
Pilot O D of
fuel
pump
dri
ve adapte
r.
Fit of
adapter in hous
ing.
Pilot
O D
of
housing
ID of
pi
lot bore
in ac
cessory
case.
Fit o
f housin
g in ca
se-
sizes an
d fits of
new parts
3.000 to 3.0
01
2.9
97 to 2.999
0.001L
to 0.00
4L
_
3.12 5
to
3 .126
3.123 to 3.124
0.001L to
0.003L
2.1 237
to
2.1247
_ _ _ _
2.125
0 to 2.1260
0 0003L
to 0 0023L
Wear
limits
2 . 1 2 2 5
2.1272
0.0035L
27
4
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Fig.
No.
126
___
126
121
Eef. Itr.
T
P
P-T
S
R
R-S
G-H
Point of
measurem
ent
O D of gear.
ID of bearing
in cam
shaft
drive housing.
Fit
of gear
in housin
g.
ID
of oil transfer
in
ner
plug hole in
gear.
O D
o
f
ca
mshaft drive
oil
transfe
r
inne
r
plug.
Fit of
plug in gear___
D
esired ba
cklash (
at
mean dim
ension)
with camshaft drive
idler
bevel
gear.
Total
backlash__l
Sizes
and fits
of
new parts
1.3095 to 1.3 105
1.3125 to 1.3135
____
0 .0020L
to 0.0040L
0.6245 to 0.6255
0.
6260 to 0.6270
____
0.0
005T to 0.00
25T
0.
0080 to 0.0 120
0.00
58 to 0.0142
____
Wear
limits
1.3075
1.31
55
0.0060L
(*)
(*)
(*)
0.0181
Fig.
No.
126
__
Ref.
Itr.
C
Q
C -Q
Point of measureme
nt
ID
o
f inner
end
of
shaft.
S
pherical O D of
cam
sh
aft drive oil tra
ns
fe
r inner p
lug.
Fit
of
plug
in
shaft
_
__
Sizes and
fits
of
new parts
0.4995 to 0.5005
____
0.4970
to 0.4980
____
0 .0015 L to 0.0
035L
Wear
limits
0
.5020
0.4955
0.0050L
Fi
g.
No.
126
Eef. Itr.
D
V
D
-V
Point
of measurement
ID
of
governor drive
s
haft hole in
gear.
O D of d
rive
shaft
on
governor lower race.
Fit
of shaft in
gear
S
izes
and fits
of
new parts
0.6250
to
0.6260 ____
0.6240 to
0.6245
____
0.0005L t
o 0.0020L
Wear
limits
0.628
0
0.6220
0.0040L
275
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Cont d.
Fig.
No.
126
__
126 __
12 1
_
Eef. I
tr.
U
E U
p
B
B-F
J K
Point of measurem
ent
in
s
quare
hole
in
gear
.
of
square end
of
drive shaft on
gov
ernor lower ra
ce.
Pit of sq
uare shaft
in
gear.
O
D o
f gear _ __
ID
of bearing in
cam
shaft
drive
housing.
Fit of g
ear in housing.
Desired backla
sh at
mean dim
ension)
with fuel
pump
beve
l gear.
Tot
al backlash
Size
s
an
d
fits
of
new parts
0.312
to
0.3 14
_
3.304
to
0.3
06 _
0.006L
to
0.
010L__
_
0.9970
to
0.998
0
0.9995
to
1
.0005 ____
0.00
15L to 0.0035L
0.0
080
to
0.012
0.0059 to
0.0141 ____
Wear
limits
0.319
0.299
0.0 15L
0
.9950
1.0025
0.005
5L
0.0180
Fig.
No
.
126
—
12 1
__
Re
f. Itr.
M
P
M-P
K-L
Point
of measurem
ent
ID of
bearing in
cam
shaft
driv
e
h
ousing.
P
it of gear
in h
ousing
Desired backlash
at
moan
dimension
)
with fuel pum
p
bevel
gear.
T
otal ba
cklash
__
Sizes
and
fits of
new
parts
1.309
5 to 1.3105
1.3125
to
1.
3135 ____
0 0
020L
t
o
0
.0040L
0.0080
to
0.0120
____
0.0059
to
0.0141 _
___
Wear
limits
1.3075
1.3155
0
.0060L
0.0
180
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/.
Fig.
No.
126
126
121
121
___
Ref. Itr.
L
K
K-
L
G
J
G-J
K L
J-K
Point
of
meas
urement
La
rge OD of gear
____
ID
of
large bearing
in
f
uel
pump d
rive
adap
ter.
Fit o
f
larg
e OD of
gear in adapter.
S mall
O D of gear____
I D
of
small
bearing
in
fuel pump
drive
adapter.
Fit
of
small
OD
of
gear
in
adap
ter.
Desir
ed
backlash
(at
mean dimension)
with governor
and
fu
el
pump drive
beve
l
ge
ar.
Total
backlash___
Desired backlash
(at
mean dimension)
with
governor bevel
gear.
Total
backlash_
__
Sizes
and
fits of
new
parts
1.9335
to
1.9345
1.9360
to
1.9370
0.001 5 L to
0.0035L
0.9980
to 0.9990
1.0000 to 1.0
010
0.001 0 L
to
0.0030L
0.0080 to 0.01
2
0.0059 to 0.0 141
__—
0.0080 to 0.0120
__—
0
.0059 to 0.0141 ____
Wear
l
imits
1.9320
1.9385
0
.0050L
0.9965
1.0025
0.0045L
0.0180
0.0
180
147.
Po
w er
Tak
e-Off Dr ive
A s s e m b l y
(par.
58
)
Fig.
No.
119__
120
__
119_
_
Ref.
Itr
.
u
V
U-V
w
Y
W-Y
Point
of
measu
rement
O D of small
end of
shaft.
ID of bearing in ac
cessory case.
Fit of shaft in case ___
OF
of large end
of
shaft.
ID of
bearing in power
ta
ke-off
drive
adapt
er.
Fit of
shaft
in adapt
er-
Sizes and fits of
new parts
1.4970 to
1.4980 ____
1.5000 to 1
.5010 __—
0 .0020L to 0.0040L
1.7470 to 1.7480
__—
1.7500 to 1.7510 __—
0.002 0 L to 0.00
40L
Wear
limits
1.4950
1 .
5030
0.0060L
1 .7450
1.7530
0.0060L
278
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Fig.
No.
11Q
119 _
Ref.
Itr.
T
T
V
SS
TT
SS
-TT
Point
o
f measurement
Pilot O D of adapte
r
cesso
ry case.
ID
of bearing bore in
adapter.
Fit
of b
earing in
adapter.
Sizes
and
fits
of
new
parts
4.
6230 to 4.624
0 _
4.6250
to
4.6270
_
0 0010L to 0 0040L
2.0000 to 2.0010
2.0015 to 2.0025
0.0005T
to
0.0025T
Wear
li
mits
148 Superchar
ger
Im
peller
Di f fu s
er and
Hous ing
(par. 59
ft.
Fig.
No.
127
119
127 _
119
Ref. Itr.
G
FF
G-FF
G
FF
G-FF
Point of meas
urement
Clearance from back
of impeller to
front
face
of diffuser.
Majo
r
ID of spline in
impeller.
impeller
driven
gear.
Fit of major
diameters
of
impe
ller and
gear.
M
inor
ID
of spine in
impeller.
Minor O D of spline
on
impeller
driven
gear.
Fit
of minor diamet
ers
of
impeller
and
gear.
Sizes
and fits
of
new
parts
0.030 to 0.035
0.7590 to 0 .7
600
0.757
0
to 0.7580
0 0010L to
0 0030L
0.6365 to
0.6375
0.6140 to 0.6
200_
0 0165L to
0 0235L
Wea
r
limits
279
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t
o
C
O
R
K
>
8
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C o
nt'd.
Fig.
No .
127
_
Eef. Itr.
D
J
Point of
me
asurement
OD
of
impeller
Small
ID
of super
charger
housi
ng.
of
im
peller
in
hous
ing.
Sizes
and
fits
of
new
parts
5.0900
to
5.1100
5.1530 to 5 .1570
0.021
5 L to 0.0335L
Wear
limits
Fig.
No.
127
127
119
Eef. I
tr.
E
C
C-E
F
Q
F-Q
Point
of measu
rement
Pilot
OD of
front
flange on
diffuser.
I
D
o
f pilot
bore in
s
u
percha
rger housing
.
hous
ing.
Pilot OD of r
ear
flange
and diffuser
.
ID
of pilot
bore in
ac
cessory cas
e.
Fi
t
of
diffuser in case
Sizes a
nd
fits of
new
parts
16.3
71 to 16.374
1
6.375 to 16
.378
0.0
01L to
0.0
07L
16.3
71 to
16.374
16.375
to 16.378
0.001L to 0
.007L
Wear
lim
its
Fig.
No.
12
7
Ref. Itr.
B
A
A-B
Point
of
measurement
b
ow
bore
in
supe
r
charger
housing.
Pilot
OD
of carburetor
elbow.
Fit of elbow
in
hous
ing.
Sizes
and fits of
new parts
6.125 to 6.126
6.122 to
6.124
_ _
0.001L to 0
.004L
Wear
limits
281
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149. Camshaft
and
Drive
i gh t
1-3-5
) Side
Fig.
N o.
128
130 _ _ _
128
Eef.
Itr.
AA
K
K-AA
Z
BB
Z-BB
Point
of
measurement
O D of
cam
shaft jour
nals.
Maximum
out of
round
of
journa
ls.
Maximu
m run
out
of
cen
ter
journal when
supported on
end
journals.
ID
of camshaft bear
ings.
Fit
of
bearings on
journals.
O D of large journa
l
on
end of camshaft.
ID of bearing in
cam
shaft gear
housing.
Fit of
camshaft
in
housing.
Sizes
and
fits of
new parts
1.3090
to
0.0010
0.0020
1.3120
to
0.0020L to
2.496
5 to
2
2.5000
to
2
0.0025L
to
.3100 ___ _
.3130 _ _ __
0.004
0L
4975 __ __
5010 __ __
0.0045L
Wear
limits
1.3070
0.0020
0.0150
1.3150
0.0060L
2.4945
2.503
0
0.0065L
Fig.
No.
128
128
121
Eef. Itr.
B
G G
B-GG
A
C
A-C
G-H
Point of
measurem
ent
O D of camshaft
drive
oil
transfer
inner
plug
Fit
of plug
in
gear_ _ _ _
OD
of
g
ear
ID of bore
in
c
amshaft
drive
housing.
F
it of
gear
in housing.
Desired backlash
at
mean
dimension
with
ca
mshaft d
rive
idler bevel
gear.
Total back
lash
Sizes and fits of
new parts
0.6245 to 0.6255
0.6260
to 0.6270
_ _ _ _
0.0005T
to
0.0025T
1.3095
to
1.3105
1.3125
to
1.3135 ___ _
0.0020L
to
0.0
040L
0.
0080
to 0.01
20 _ _ _ _
0.0058
to
0.0142
Wear
limits
*
*
*
1.3075
1.3155
0.0060L
0.018
1
282
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Fig.
No.
118
Kef.
Itr.
Q
N
N
-Q
Point
of measureme
nt
Pilot
O D
of
housing
ID of
pilot bore in ac
cessory case.
Fit of housin
g
in
case_
Sizes and
fit
s
of
new
parts
2.1237
to
2.12 47
____
2.12
50 to 2.1260 ____
0.0003L to
0.0023L
Wear
lim
its
2 .1225
2
.1272
0.00 3 5L
Fig
.
No.
128
128
___
121
Ref. Itr.
D
EE
D-
EE
D D
H
H-D
D
A-B
Point
of measurement
O D of gear
ID
of camshaft
drive
sh
aft support.
Fit of gear
in support-
ID
of gear
_ _ _
O D
of cams
haft drive
oil
transfer outer
plug.
Fit of plug
in
gear____
Desir
ed
backla
sh
(at
mean dim
ension)
wi
th
cam
shaft bevel
gea
r.
To
tal
backlash_
__
Sizes and f
its
of
new parts
1 .4030
to 1 .
4040__
1.40
65 to 1.4075
____
0.0025L to
0.0045L
1 .0750
to 1.0760
1.07
40 to 1.0745
0.0005L to
0.0020
L
0.006
0
t
o 0.012
0.0055 to 0.0165 ____
Wear
limits
1.4010
1.4095
0.0065L
1.077
0
1.073 0
0 .0030
L
0 .0204
Fig.
No.
128
1
28
R
ef.
Itr.
X
Y
X -Y
W
J
Point
of measurem
ent
ID
of mating
bore
in
camshaft.
Fit of
ge
ar p
ilot
i
n
camshaft.
Small
O D of camshaft
oil retaining
cover.
Sizes and
fits
of
new parts
1 .3115
t
o
1 .312
5
1 .3120
t
o
1 .3130
0 .00151,
to
0 .0005T
1.0000
to 1 .0010
0.9980
to
0
.9990 _
Wear
limits
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1
D
R
A
P
D
8
5
9
4
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C on
t'd.
Fig.
No.
121
Ref. Itr.
J-W
A-B
Point
o
f measurement
Desired
b
acklash
(at
mea
n
dim
ension)
w
ith camshaft
drive
bevel gear.
Total
backlash_ _ _
S
izes and
fits
of
new
parts
0.0010L
to
0.0030L
0.0060
to
0
.0120
0.0055
t
o 0.0 165
Wear
limits
0.0204
/.
Fig.
No.
128
Eef.
Itr.
F
G
F-G
Point
of
measurem
ent
ID
of
both ends of
shaft.
Spher
ical O D
of c
am
shaft
d
rive inner
and outer
oil tran
s
fer
plugs.
Fit of plug in s
haft
Sizes and f
its
of
new
parts
0.4995 to 0.5005
_ _ _ _
0.497
0 to
0
.4 9 8 0 _ _ _ _
0.0015L to 0.0
035L
Wear
limits
0.5020
0.4955
0.005
0L
Fig.
No.
128
Eef. Itr.
cc
FF
CC-FF
Poi
nt
of measurement
shaft
support.
Fit o
f support in
hous
ing.
Si
zes
and fits of
new parts
2.4380
to
2.439 0
2.436 7
to 2.4377
0.0003
L to 0.0023L
Wear
limi
ts
Fig.
No.
128
Eef
.
Itr
.
L
Point
o
f
measurem
ent
Distance
across
flat
s
of square
end of
tachomet
er
d
rive
shaft.
Sizes and fits of
new
parts
0.507 to
0.509_
W
ear
l
imits
2
85
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C ont
d .
F
ig.
No.
1
28
128
12
8_ -
12
8
1
28
Ref. Itr.
K
K-L
M
V
M
-V
P
E
E
-P
Q
v
R
Q
-E
S
N
N
-S
T
U
T-U
P
oint o
f
m
easu
remen
t
Dist
ance
acro
ss
flats
of
hole
in camshaft
oil r
etain
ing c
over.
Fit
o
f sh
aft
i
n c
over_
_
OD
of ta
chom
eter
driv
e sha
ft.
ID
of t
acho
meter
dri
ve
adap
ter
beari
ng.
Pit
of
shaft
in be
ar
ing.
Pilot
OD
of tach
omete
r
drive
ad
apter
.
ID
of
adap
ter bo
re
in
cam
sha
ft gear
h
ous
in
g.
F
it of
adap
ter
in
h
ous
in
g.
ID
of
oil se
al b
ore i
n
ta
chom
eter
d
riv
e
ad
apte
r.
O
D
of
tach
omet
er
dri
ve
ada
pter
oil
s
eal.
Fit of
sea
l in ad
apte
r..
D
ista
nce
a
cross
fla
ts
o
f s
quare
en
d
of
sha
ft in
tacho
mete
r.
Dista
nce a
cross
fl
ats
of squ
are
hole
in end
of tac
hom
eter
driv
e
sh
aft.
Fit of
dr
ive
s
haft on
sha
ft in
tacho
mete
r.
ID
of be
aring
b
ore i
n
tac
hom
eter
dr
ive
adapter.
O D
of ad
apter
bear
ing.
Fit
of be
rin
g
in
ad
apter
.
S
izes and
fi
ts
o
f
n
ew
p
arts
0.510
to
0.5
12__ _
0.0
01L t
o
O
O O B L
0.
7470
to 0.
7480 ____
0.
7495
to 0
.7505
____
0.001
5L
to 0
.0035
L
4
.3090
to
4.311
0
___
_
4.31
25 to
4.313
5
__
__
0.001
5L
to 0
.0045
L
1.
499
to 1.500
-
1.50
1 to
1
.505
0.0
01T
to 0
.006T
_
__
0.24
3 to
0.245
0
.248 t
o 0.
252
0.0
03L
to 0.0
09L
0.8
750
t
o
0.8
755
__
__
0
.8770
to 0
.8780
____
0.0
015T
to
0.00
30T
W
ear
lim
its
0.7
450
0.752
5
0
.0055
L
4.3070
4.3
155
0.0
065L
(* )
(* )
(*)
(* )
(
*)
(* )
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150. Cam
shaf t
and
Driv
e
Le f t 2-4-6)
Side
par.
61
)
a
.
Fig.
No.
12
9
13 0__
12
9 __
129 __
129__
129
__
Eef.
Hr.
S
K
K-S
G
G-S
T
F
F-T
Point
of
measurement
O
D
of
camshaft
jour
nals.
Maxim
um
out
of
round
o
f jou
rnals.
Maximu
m run
out
of
center journal wh
en
supported on end
journals.
ID
of
camsha
ft
be
ar
ings.
Fit of
beari
ngs
on
j
ournals.
ID
of
roc
ker
box cover
plate
(cyli
nder No.
6).
F
it
of
cam
shaft in
plate.
O D
of l
arge
journal
on end of
camshaft.
ID
of
be
aring in
cam
shaft g
ear housing.
Fit
of
camshaft
in
housing.
Sizes
and
fits
of
new par
ts
1.3090 to 1.3100 __
__
0.00
10
—
0.0020
— _ _
-
1
.3120
to
1.3130
____
0 0020
L
to
0 0040L
1.3
120
to
1.3130
____
0 0020L
to 0 0040L
2.4965
to 2.4
975
___
_
2.5000 to 2.5010
____
0.0025L to
0 0045
L
Wear
limits
1.3070
0.002 0
0.
1050
1.3
150
0.00
60
1.3150
0.00
60L
2
.4945
2.5030
0.0065L
Fig.
No.
129
_
1
9Q
Eef.
Hr.
M
K
K-M
L
Poin
t of
measuremen
t
ID of
gear
OD
of
camshaft
drive
oi
l transfer inner
plug.
Fit of plu
g in gea
r___
O D of gear
Sizes and fits o
f
new parts
0.6245
to 0.6255 __
0.6260
to
0.6270
____
0.005T
t
o 0.
0025T__
1.30
95 t
o
3105
_
.
W
ear
limits
<*)
(*)
(*)
1 QfWR
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Con t d .
Fig.
N o .
Ref.
Itr.
J
J-L
G-H
Point
o f measurement
ID of bore in c am
shaft drive
housing.
Fit of gear in housing-
m
e a n d imens i o n )
with camshaft drive
idler bevel gear.
Total backlash___
S ize s and
f i ts o f
n e w parts
1.3125 to 1.3135
0.0020L
to
0.0040L
0.0080
to 0.0120 —
0.0058 to
0.0142 ____
Wear
limits
1.3155
0.0060L
0.0181
Fig.
N o .
118
Ref.
Itr.
H
F
F-H
Point o f measurement
Pilot
OD of
housing___
ID o f
pilot
bore
in ac
cessory case .
Fit
o f
housing in
case-
S ize s and fits o f
n e w parts
2.1237
to 2.1247
____
2.1250 to 2.1260
0.0003L
to
0.0023L
Wear
limits
2.1225
2.1272
0.0035L
Fig.
N o .
129
129-
-
121-
_
Ref.
Itr.
P
H
H-P
Q
C
C-Q
A-B
Point o f measurement
OD of
gear
ID
of
camshaft
drive
shaft support.
Fit of gear in support-
OD of camshaft
drive
oil
transfer outer
plug.
Fit o f
plug in gear
___
Desired backlash
(at
mean d i m e n s i o n )
with camshaft bevel
gear.
Total backlash___
Sizes
and
fits o f
n e w parts
1.4030
to 1.4040 _
1.4065
to
1.4075 ____
0.0025L to 0.0045L
1.0750
to 1.0760-
1.0740
to 0.0745
____
0.005L to 0.0020L—
0.0060 to 0.012 _
0.0055
to 0.0165
Wear
limits
1.4010
1.4095
0.0065L
1.0770
1.0730
0.0030L
0.0204
289
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Fig.
No.
129
129
121
E
ef. Itr.
B
U
B
U
V
A
V
A-B
Point o
f measure
ment
OD
of
pilot
on
gear
ID of ma
ting
bore
in
camshaft.
Fit of gear pilo
t
in
camshaft.
ID
of gear
_ _ _
Small
OD of cam
shaft
oil reta
ining co
ver.
Fit of
cover
in
gea
r
mea
n
d
imension)
with
camshaft
drive
be
vel gear.
Total
backla
sh
Sizes
and fits o
f
new
parts
1.3115
to
1.3125
1.3120 to
1.3130
0.0
015L
to
0.0005T
1
.0000 to 1.0
010
_ _
0.99
80 to 0.9990
0.0
010L
to
0.0030L
0.0060
to 0.0120
0.0055 to 0.016
5 _ _ _ _
Wear
limits
0.0204
/.
F
ig.
No.
129
Ref.
Itr.
E
D
D-E
P
oint of
measurement
ID of
bot
h ends
of
sh
aft.
Spherical
O
D
of
cam
sh
aft driv
e inner
a
nd ou
ter
oil
t
rans
fer
plugs.
Fit
of
plug
in
sh
aft
__
Sizes and
fits of
new parts
0.4995 to 0.5005
_ _ _ _
0.49
70 to 0.4980 _ _ _ _
0.0015L
to
0.0035L
Wear
limits
0.5020
0.4955
0.0050L
Fig
.
No.
129
Eef.
Itr.
R
N
N-R
Point of
measure
ment
ID
of
bore in housing
Fit of support i
n
hous
ing.
Sizes an
d fits of
new
parts
2.4380
to
2.4390
2.4367 to 2.4377
0.0003L
to
0.00
23L
Wear
limits
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151
Cy l
inde rs
p
ar.
64)
Fig.
N o.
^n
1 Q9
Ref.
Itr.
A A
H H
A
A-HH
Point
of
measurement
O D
of cylinde
r ba
rrel
b
ore in cr
ankcase.
F
it of cylinde
r barrel
in
crankca
se .
Sizes
and
fits
of
new
p
arts
6.112 to
6.116-
_ _
6.1
25
to
6.13
0_ —
0 .0
0 9L to
0.01 8L _
_
Wear limits
Fi
g.
N o.
130_
Eef. Itr.
B B
Po
int
of
measureme
nt
Bore
diameter
1
in
fr
om bott
om
o
f sk
irt
bot
tom
of ring
tr
avel)
Bore
diamete
r
opp
osite
center
of
barrel
fins.
Bore dia
meter a
t
to
p
of
cylinde
r
b
arrel.
Ma
ximum out
of
ro
und
o
f cylin
der
bo
re .
Sizes
n
5.746
0
5
.7 42 5
5.738 0
0.00
1 0
and
fits
of
3
W parts
to
5 .7490
____
t
o 5.7455
_
__ _
to
5.7410
____
Wear
limits
5
.7590
5 .7 5 5 0
5.753 7
0.00 3 0
No.
130
130_ _
Eef.
Itr.
A
H
A-H
EE
U
Point
of
measurement
O D of
intake valve
st
em .
ID o
f i
ntake
val
ve
g
uide .
Fit of
s
tem in
guide
A n g l e
of
intake valve
seat with
stem .
O D of
exhaust
valve
s
tem.
ID
of e
xhaust valve
g
uide.
Sizes
and
fits
of
n ew
parts
0.4775
to
0.498
0 _
0.4995 t
o 0.500
5 _
___
0.0015
L
t
o 0.00
3 0 L
45 °
15' __ __
_
0.5575
to 0.
5580
0.5615
to 0.5
62 5 _ _
_ _
Wear
limits
0 .5020
0 .0050L
0.5660
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c.
Cont d.
Fig.
No.
Ref. Itr.
U
EE
Point of measure
ment
Fit of stem
in guide
Angle
of
exhaust
valve
seat with
stem
.
Si
zes
and
fits of
new p
arts
0.003
5L
to
0.005
0L
45° 15
_ _
Wear
li
mits
0.0080L
Fig.
No.
130.-
_
130_
Re
f.
Itr.
G
X
G-X
V
Y
V-Y
Po
int of measurement
guide.
ID of
gu
ide bor
e in
c
ylinder he
ad.
Fit
of
guid
e in cylin
der head.
OD o
f
ex
haust valve
guide.
cylind
er head.
Fi
t of
guide
in cyli
n
der head.
Sizes
and fits of
new
pa
rts
0.6890
to 0.6895
0.687
0 to
0.6
880 _
0
.0010T
to
0
.0025T
0.7525
to 0.7530 _
0.7495 to 0.750
5 _
0.0020T
to 0.0035T
Wear
limits
Fig.
N
o.
130
13
0
__
Eef.
Itr.
C
B
P
oint of
m
easurement
S
mall OD
o
f
insert _
Small
ID of
bore in
cylinder
head
.
cylinder
head.
Fit
of
ins
ert in
bore
Width
of
valve
seat-
A
ngle of
seat
Angle
of relief
for
narro
wing width
of
seat)
Sizes
and
fits of
new parts
2.6930
to 2.6940 _
2.6840
to 2.6860 __
0.0070T
to 0.0100T
3.1240 t
o
3.
1260
__
3.12
50
to
3.
1270 _
0.00
30L
to 0.0010T
0.06
to
0.09
44°
45
to 45° 0 _
30° an
d 60° -
Wear
limits
0.16
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/.
Fig.
N o.
1
Qft
Eef. Itr.
D
D
Poin
t of measurement
S mall
O D
of
insert
Small
ID
of bore in
cylin
der he
ad.
Large O D of
insert
Large
ID
of bore in
c
ylinder
head.
Fit o
f in
sert
in
bore
narrowing
widt
h of
seat)
S
izes
and
fits of
new parts
2.2560
to
2.2570-
—
2.2470 to 2 .2490
0.0070T
to
0.0100T
2.68
60 to 2.6880 —
2.6870
to
2.6890 -
0 .0030L to 0.0010T
0.06
to 0.09-
_
—
44°
45
' to
45°
0
'
30° and
60°—
Wear
limits
0.1 6
Fig.
No.
Eef. Itr.
Point of measu
rement
130_
130_
130_
Out
er valv
e
spring (large):
S cale
reading:
124.4
Ib
±
10
at
1.56
in
Scale readi
ng:
8
5.0 Ib ± 5
at
2
.12
in
Ma
ximum
solid
height:
1.47
in
Interme
diate
valve spring (m
edium):
Scale
reading: 7
4.9
Ib
±
10
at 1.56
in
Scale
reading: 51.2 Ib ± 5 at
2 .12 in
Maximum
solid
height: 1.34
in
In
ner valve spring (small):
S cale
reading: 40.0 Ib
+
10 at
1.38 i
n
Scale readin
g: 25.8 Ib ± 5
at
1.93 in
Maximum solid
height:
1.28
in
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t
o
R
P
D
8
5
9
6
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P
i g
N o.
13
0- _
Ref. Itr.
w
J-W
Point
of meas
urement
seat
both valves)
.
Large OD
o
f valv
e
guid
es on
sho
rt
e
nd).
Siz
es and
fits of
new p
arts
0.787
0
to
0.7930
0.77
80 to
0.784
0.
0.0030L
to 0 0
150L
Wear
l
imits
F
ig.
N o.
13 0
_
130-
Ref.
I
tr.
M
N
M
-N
L
L-M
Point of m
easuremen
t
OD
of shaft
ID
of valve
rocker
bea
ring.
Fit
of s
haft in bear
ing
.
rocker sh
aft
b
racket
an
d cams
haft
bear
ing cap
.
Fit o
f
sh
aft in
bracket
a
nd
c
ap.
S
izes
and fit
s
o
f
new p
arts
0.7480
to 0.748
5
0.7495
to 0.7
505
_ _ _
_
0.0010
L to 0
0025L
0.7485 to
0.7 495
O O O
O O L to 0 0
015L
Wear
limits
0.745
5
0.7530
0.0
050L
Fig.
N o.
ISO-
1
30
12 9
Re
f.
I
tr.
Q
F
F-
Q
K
S
Point
of measur
ement
bea
ring
cap an
d
rocker
shaft
b
racket.
OD
of
d
owel
pins
Fit
of pins
in
ca
p
an
d
bracket.
ID o
f
c
amshaft
bea
r
ing.
O
D
of cams
haft j
our
na
l, lef
t (2-
4-6)
side.
Sizes
and fits
of
new
parts
0 .
2 500 to
0.25
10
0.25
01 to
0.2503
0.000
9L to
0 0003T
1
.312 0 t
o
1.
3130 __ __
1.3090
to 1
.3100 _ _ _ _
W
ear
limits
— — — — —
— —
1
.3150
1.307
0
29
5
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C ont'd.
Fig.
N o.
128 ___
Eef
. Itr.
A A
K
-S
K-AA
Poin
t
of
measurement
O D of ca
mshaft jour
nal,
right
(1-3-5)
side.
Fit
of bearing
on
jour
nal, (both sides).
Size
s
a
nd
fits of
new
parts
1.3090 to
1.3100 ____
0.0020L to 0.004
0L
Wear
limits
1.30
70
1 .0060L
Fig.
N o.
130
Eef. Itr
.
E
F
E
-F
Poin
t
of
measurement
ID of dowel
holes in
cylinder
head.
head
.
Sizes
and
fits of
new
parts
0.2470 to
0.2480
0
.2501 to 0.2503
0.0021T
to
0 .0
033T
Wear
limits
152. Pisto n s
(par. 67)
Fig.
N o.
131
Ee
f. Itr.
H
Point of mea
surement
of skirt at 90°
to
piston pin.
to rn of skirt a
t
9
0°
to pi
ston pin.
S i
zes and fits of
new
parts
5.721 to 5.722
_
_
5
.724 to 5.7
25 _
Wear
limits
5.718
5
.721
Kg.
N o
.
131
_
__
Ref. Itr.
A
X
Point of measu
rement
Outside w
idth to com
pressi
on ring
(No .
1 (top) ring).
I
nside width
of N o. 1
ring
groove
in pis
to
n.
Sizes and fits of
new
parts
0.092
5 to 0.0935
____
0.0980
to 0.990 ____
Wear
limits
0.0890
0.1025
296
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C o
nt d.
Fi
g.
N o
.
131
1
31
___
131
Eef
. Itr.
A X
B
W
B-W
C
F
C-
F
D
G
D-
G
Poi
nt
of
me
asurem
ent
Fit
(side
cl
earan
ce)
o
f
No.
ring
in
groov e.
G
ap clea
ranc
e
of N o.
r
ing w
hen
fitte
d
in
5.750
in
ch
ring
gag
e.
Outs
ide w
idth
of
c
om
p
ress
ion
r
ing (
No. 2
ring
)
Insi
de
widt
h o
f
No. 2
rin
g
groo
ve in
pis
to
n.
F
it (s
ide
clear
ance
) of
No.
2 ring
in
groo
ve.
G
ap cle
aranc
e o
f
No.
2
rin
g whe
n
f
itted
in
5
.750 inc
h
ring
g
age.
O
utsid
e
wid
th of
oi
l
control
ring
(No.
3
rin
g .
Ins
ide
wid
th
of N
o. 3
ring
gro o
ve in p
is
to
n.
Fi
t (si
de clea
ranc
e) o
f
N
o.
3 ri
ng in
gr
oove
.
G
ap cle
aran
ce o
f N
o. 3
ri
ng when
fitte
d
in
5
.750
i
nch ri
ng g
age.
Outsi
de w
idth
of
o
il
con
trol
rin
g (N o
. 4
b
ottom
) ring
.
Insi
de w
idth
of
N
o.
4
ring
gr
oove
in
pis
to
n.
Fit (
side
clea
rance
) of
No.
4
ring
in
groove.
G
ap cle
aran
ce o
f No
.
4
ri
ng wh
en
fitte
d
in
5.
750 i
n r
ing
gage
.
Size
s an
d
fits of
new
p
arts
0 .0
045L
to 0
.0065
L
0 .0
050 t
o
0 .0 60
0 ___
_
0.09
2 5 to
0 .0
935
____
0
.098
0 to
0.99
0
0 .00
45L
to 0 .0
065L
0 .0
500 t
o
0.06
00 ___
_
0.18
60 to
0
.1 865
__ .._
0 .1
890 t
o 0 .
1 900
0 .0
0 2 5L
to
0
.004
0L
0.03
50 to
0 .0
450
____
0.186
0
t
o 0 .
1 865
0.18
80 to
0.1
890 __
__
0
.0 0 15
L
to 0 .
003 0
L
0 .0
350 t
o 0 .
0450
_ __
_
Wear
lim
its
0.010
0L
0
.0650
0 .0 9
00
0 .101
5
0 .
0090L
0 .065
0
0 .1 8
50
0.191
0
0
.0050
L
0.06
00
0 .1
850
0
.191 0
0 .0
040L
0.060
9
7
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K
»
O
E
P
1
8
5
9
7
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Fig.
N o .
131
131 ___
13 1
Eef. Itr.
u
V
U-V
R
R-U
T
E
E-T
Point
o f
measurement
ID of piston
pin
hole
in
piston.
Fit o f pin
in
piston
ID o f piston pin
bear
ing.
Fit o f pin in bearing-
ID
o f piston
pin_
Fit o f rilus
in
nin
Sizes and
fits
o f
new parts
1.3750 to
1.3752 _
1.3755 to
1.3757
0.0003L
to
0.0007L
1.3762
to
1.3764
____
0.0010L
to
0.0014L
0.9678
to
0.9688 _
0.9668
to
0.9678
O . O O O O L
to
0.0020L
Wear
limits
1.3745
1.3762
0.0012L
1.3770
0.0020L
153.
Crankcase
(par. 69)
Fig.
N o .
132
130
Eef.
Itr.
HH
A A
AA-GG
Point o f
measurement
bore
in
crankcase.
OD o f cylinder barrel
in bore .
Sizes and fi ts o f
new
parts
6.125
to 6.130
6.112
to 6.116
_
0.009L to 0.018L __
Wear
limits
Fig.
N o .
132
132
132
_
Ref. Itr.
W
z
X
Y
Point o f measurement
ID
o f bearing
bore
in
crankcase.
Main
bearing thick
nes s .
Outside
w i r i t
h
of
thrust main bearing
w e b
in
crankcase.
Inside width of
thrust
main bearing
face.
S ize s and
fits o f
new parts
3.8140
to 3.8145
_
0.1562
to
0.1567
____
1.745 to
1.747
1.749 to 1.751
_
__
Wear
limits
0.1542
(* )
(* )
299
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Con t d.
Fig.
N o .
132
Eef. Itr.
X-Y
DD
G
G-DD
Point o f measurement
Fit o f
bearing over
crankcase
w e b .
OD o f
main
bearing
journals o n
crank
shaft.
ID of main
bearings
at proper
tightness.
Fit
(oil
clearance) o f
bearings o n
jour
nals.
S izes and fits o f
n e w parts
0.002L to
0.006L
____
3.4970 to 3.4980
3.5015 to 3.5040
0.0035L
to 0.0070L
Wear
limits
(*)
3.4957
3.5053
0.0090L
Fig.
N o .
132
_
145
132_
132_
132.
Ref. Itr.
A
Q
M
L
L-M
N
K
K-N
J
H
H-J
Point o f measurement
bore in crankcase.
Fit
of
housing
in
crankcase.
ID of fan drive verti
cal shaft
bearing
bore in
crankcase.
cal shaft
bearing.
crankcase.
bearing
dowe l
pin
hole
in crankcase.
OD o f vertical shaft
bearing dowe l
pin.
Fit o f pin in crank-
case .
ID of fan
drive
bevel
gear
bearing
bore
in
crankcase.
OD
o f fan drive bevel
gear bearing.
Fit of bearing in
crankcase.
S izes and fits o f
n e w parts
4.7500 to 4.7510
4.7480 to 4.7490 _
0.0010L
to
0.0030L
1.2500 to 2.2510
_
1.2495
to
1.2500
—
O . O O O O L to 0.0015L
0.1835
to
0.1845
_
0.1850 to 0.1870 _
0.0005T to 0.0035T
1.6800
to 1.6890
1.6875 to 1.6880
O . O O O O L to 0.0015L
Wear
limits
301
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154.
C r an k s h a f t and C o n n
e c t i n g Rod A
s s e m b l y
(par.
72 )
Fig-.
N o.
132
132
132
___
132
__
132
_
_
Eef.
Itr.
c
B
B-C
BB
AA
AA-BB
E
F
E-F
C C
V
V - C C
D D
G
Point
of
measurement
Crankshaft to be
in
dynamic
l nce
within
0.25 oz-in at
2,800 rpm.
ID
of
oil slinger bore
in
crankshaft.
O D
of
crankshaft
oil
slin
ger.
F
it
of sling
er in
crankshaft.
ID of
tran
smission
drive sh
aft pilot
bearing bore
in
crankshaft
.
O D
of
transmission
drive shaft pilot ball
bearing.
Fit
of
bearing
in bore_
ID of
flywheel dowel
pin
hole in
crank
shaft.
O D of
flywheel dowel
pin.
F
it
of
pin
in c
rank
sha
ft.
O D
of
fly
wheel
end
of
crankshaft.
ID of
crankshaft pilot
bore in
flywheel.
Fit
of
flywheel on
crankshaft.
O D
of
main
bea
ring
journa
ls.
ID of
main
bearings
at proper tigh
tness.
Sizes
and
fits
of
new parts
1.570
to
1.571-
_
1.571
to
1.572
_
O
. O O O T
to
0 .002T
2 .8338 to 2 .83
46
____
2 .8340
to
2.8346
____
0 .0 0 0 6 L
to 0.0008T
0 .6245
to 0.6255 ____
0.6255 to 0.625
7
____
O . O O O
O T to 0.0012T
6. 9985
to
6.9995
7.0000
to
7.0010
0.00
0 5 L to 0.0025L
3.4970
to
3 .
4980
____
3.5015
to
3.504
0
____
Wear
limits
2 .8350
2.8336
0.0010L
(*)
(*)
(*)
3 .4
957
3.5053
302
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—
Co
nt'd
.
F
ig.
No.
1 3
2
1 32
1 32
1 3
1
1 32
1 3
1
1 3
2
E
ef. Itr
.
G
-D
D
F
F
Z
Z-
FF
DD
D
N
D
-N
D
P
D-
P
D
P
oin
t o
f
mea
sure
men
t
F
it
(o
il cl
ear
anc
e)
of
bearings
on
jour
nal
s.
I
nsi
de
w
idt
h of t
hru
st
ma
in
be
arin
g j
ou
r
na
l.
Ou
tsid
e
w
idt
h
of
th
rus
t
m
ain
bea
rin
g.
C
ran
ksh
aft
end
pla
y
Taper
in
length
of
one
m
ai
n
be
ari
ng
jou
r
n
al
(m
us
t
be
un
i
for
m).
M
ax
im
um
out
of
ro
und
of
m
ain
bea
rin
g
jo
urn
als
.
M
ax
im
um
ru
n o
ut
of
N
o.
2 a
nd
3
mai
n
jo
ur
nal
s wh
en
su
p
ported
at
No.
and
4
jou
rn
als.
O D
o
f co
nne
ctin
g
ro
d
j
our
na
l.
I
D o
f co
nne
cti
ng
ro
d
b
ear
ing
at
p
rop
er
tor
qu
e
tig
htn
ess
on
b
olt
s
(pa
r.
167
).
F
it (
oil
cle
ara
nce
) o
f
journal
in bearing.
I
nsi
de
wi
dth
of
co
n
ne
ctin
g ro
d j
our
nal
.
Ou
tsi
de
w
i
dth
of
cra
nk
sha
ft
en
d o
f
con
ne
ctin
g
rod
.
F
it (
sid e
c
lea
ran
ce)
of
r
od
o
n
c
ran
ks
haf
t.
M
axi
mu
m o
ut o
f
rou
nd
of
co
nne
ctin
g
ro
d
jo
urn
al.
T
ap
er
in l
eng
th
of
one
jou
rn
al
(m
ust
be
u
nif
orm
)
S
izes
an
d fits
of
n
ew
part
s
0.0
035
L t
o
0.0
070
L
1 .9 9
9 0
to
2
.00
10 _
__
_
1
.989
0
to
1 .
9 9 1
0
0.0
08
to
0.0
1 2
0.0005
____________
0.0
01
—
0
.00
5
3 .2
4 80
to
3 .
2 4 9
0 ___
_
3.25
2 5
t
o 3
.25 4
0 _
___
0
.003
5L
to
0.
006
0L
1
.5 77
to
1 .5
81
1
.5 6
7
to
1 .5
6 9
_
_
0
.00
8L
to
0
.014
L __
_
0.00
10
_
_
_
_
0.0
005
_
_
We
ar
limi
ts
0
00
90L
2.0
06
0
1
.9 8
4 0
0.
01 7
0.001 0
0.00
6
3 .2
4 6 0
3
.25
60
0.0
080
L
1 .
5 84
1 .5
6 4
0.01
7L
0.0
020
0
.00
1 0
3
3
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Fig.
No .
132
_ _ _
13
2_ _ _
132
Ref
. Itr.
z
FF
Z-FF
G
DD
G-DD
Z
Point of
measurement
Outside
width
of
thrust bearin
g.
Inside width of thrust
bearin
g
journal.
Cranksh
aft
end
play
_ _ _
ID of main bearin
gs at
proper
tightness.
OD of
m
ain bearing
journals.
Fit (oil
clearance) of
bearings on
jour
nal
s.
M
ain
bear
ing thick
ne
ss
(std
).
Sizes
and fits o
f
new parts
1.9890
to
1.9910
1.9990 to 2.0010
_ _ _ _
0.0080 to
0.0120
_ _ _ _
3.5015 to 3.5040 _ _ _ _
3.4970 to 3.4980 _ _ _ _
0.0035L to
0.0 070L
0.
1562
to
0.1567 _ _ _ _
Wear
limits
1.9840
2.0060
0
.0170
3.505
3
3.4957
0.0090L
0.1542
Fig.
No.
131 _
131 _ _ _
131
Eef. Itr.
K
S
K S
E
U
R
-U
L
Q
L-Q
Point
of measure
ment
ing bor
e in
connect
ing
ro d
.
OD of piston p
in bear
ing.
ID
of piston pin bear
ing.
Fit of pin
in bearing
ID
of bolt
hole
in
con
n
ecting rod and cap.
bolt.
F
it of
bolt
i
n ro
d and
cap.
Sizes an
d fits of
new parts
1.5340
to
1
.5350 _ _
1.
5370 to 1.5375
0.0
020T to 0.0035T
1.3
762 to 1.37
64
_ _ _ _
1.3750
to 1.3752
0.0010
L to 0.0014L
0.5620
to
0.5630
0.5613 to
0.5 618
_
0.0002L to
0.0017L
Wear
limits
1.3770
1.374
5
0.0020L
304
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c. Cont d
.
Fig.
No.
131
131
132 ___
13
1
132_
(
Fig
.
No.
133 __
133
__
Ref.
I
tr.
P
N
D
D-N
P
D
D-P
Ref.
Itr.
F
C
C-F
D
C-D
Point
of measurement
IB
of
bore of large
(crankshaft) en d of
connecting rod.
ID of connecting rod
bearing wh
en
in
stalled
with
proper
torque
on
bolts (par
167) .
R
od bearing thickness
at ends.
Rod
bearing
thickness
at cent
er.
OD of crankshaf
t
journal.
Fit (oil
clearance)
of
bearing
on
journal.
Outside width
of
con
necting rod at
crank
shaft
end.
Inside width
of
con
necting rod j
ournal.
Fit
(side clea
rance)
of
rod
on crankshaft.
Allowable twist of
c
onnecting
rod.
Point
of
measurement
ID of damper hub
holes .
OD of counterwe
ight
pin.
Fit of
pin
in
hub
ID of counterweight
holes .
Fit of pin in c
ounter
w
eight.
Sizes
and fits of
new parts
3 .5315
to
3.5320
3 . 2525 to 3 .2540 ____
0.1389 to 0.1392 ____
0.1394
to
0 .1 397 ____
3.2480 to 3 .2490 ____
0.003
5 L to 0.0060L
1.567 to 1.569
—
1.577
to 1.581 _
0.008L
t
o 0.014L ____
0.0005 per inch of
bea
ring
length
.
Sizes
and fits of
new
parts
1.8125 to 1.8140 ____
1 .3 647 to 1.3657
0.4468L
to
0.4493L
1.8125 t
o 1.8140 ___ _
0 .4 468L to 0.4493L
Wear
limits
3 .2560
0.1 379
0.1384
3 .2460
0.0080L
1 .564
1.584
0.017L
Wear
limits
1.8160
1.3630
1.8
160
305
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Cont d
.
Fig.
No.
133
13 3
13 3
133 ___
13 3
133 _
_
13 3
Ref. Itr.
L
D L
F
L
A
G
A-
G
K
H
H-
K
E
B
B-E
P
N
N P
J
J
N
Point
of me
asurement
OD
of counte
rweight
pin bushing.
F
it of bushing
in
coun
terweight.
Fit o
f
bu
shing
in
damper
hub.
ID of
counterweig
ht
stop
plate.
O
D of
dam
per hub
flan
ge.
Fit
o
f sto
p plate on
hub.
Inside
width
of
coun
terweight.
Width
of
da
mper h
ub
Fit of c
ounterweigh
t
over hub.
t
erweight.
Inside
width of coun
terw
eight pin.
Fit
(end
play)
of
pin
in
counterweig
ht.
O
D of ma
le cou
nter
weight pin.
b
ushing.
Fit of
male pin in
bushing.
OD of
female
counter
weig
ht pin.
Fi
t
of
female pin
in
bushing
.
Sizes
and fits of
n
ew
parts
1.6994
to
1.7004 ____
0.1121L
to
0.
1146L
0.1121
L to 0.1146
L
3.687
5 to 3.6900
3.68
55
to 3.
6870
0.0005L to
0.0045L
0.75
70
to
0.763
0
0.7490 to 0
.7510 __
__
0.0060L to
0.0140L
1.65
30 to 1
.6630
1.6
750
to 1.6800
0.0120L
to
0.0270L
0.873
0
to 0.
8740
0.8745
to 0.8755
0.0005L
to 0.0025L
0.8730 to 0.8740
_ _
0.0005
L
to
0.0025
L
W
ear
l
imits
1.
6980
0.7690
0.74
30
0
.0200L
306
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Se
e p
arag
rap
h 162
for
in
tern
al
fly
whe
el an
d to
rsio
n
da
mp
er sta
nd
ards
.
Fig.
N
o.
132 _
__
13
2—
13
2 __
_
R
ef.
Itr.
F
E
E-
F
T
F-T
V
cc
V-C
C
Po
int
of
me
asure
men
t
O D
of flywhee
l
dow
el
pin.
ID
of
dow
el
pin h
ole
i
n cra
nksh
aft
.
Fi
t o
f
pin
in c
rank
sh
aft.
ID
of
d
owe
l p
in ho
le
in
fly
whe
el.
Fi
t of
pin in
f
lyw
heel
ID
of
cra
nks
haf
t p
ilot
bore
in
flywheel.
O
D o
f
flyw
hee
l
e
nd
of
cran
ksh
aft
.
Fit
o
f
fly
whe
el o
n
c
ran
ksh
aft.
Si
zes
an
d fit
s of
new
part
s
0.6255
to
0
.6 2
57
_
___
0.6 2
45
to 0
.6 25
5 _
___
O
O O O
O T
to
0.00
12T
0
.6 24
5 t
o 0.
6255
O
O O
O O T
to
0.0
012
T
7
.000
0 to
7.0
010
6
.9 98
5
to
6.9
995 _
___
0
.000
5L
to
0
.0 02
5L
W
ear
l
imits
(*)
(*)
(*)
(
*)
(
*)
3
7
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155.
S
cave
nge r
and
r e
s s u r
e
O
il P u m p
Dua
l Un
i t
(pa
r. 74
Fig.
No.
13
4
134
Eef. Itr.
H
AA
BB
AA-B
B
W
W-
BB
Point
of
measurement
T
hickne
ss
of
separa
tor
pla
te.
ID
of dow
el holes
in
separ
ator
plate.
OD
o
f
sep
arator
pla
te
d
owel p
ins.
Fit
of pins
in pla
te
ID
of dow
el holes
in
both
pump
housin
gs.
Fit
o
f
pins
in h
ous
ing
s.
Size
s
and
fits
of
new
parts
0.620 to
0.630
0.249
0 to 0.2
500
0.25
01 to 0.
2503
0
.0001T
to 0.
0013T
0.
2500 to
0.2510
0.0009
L to 0.
0003T
W
ear
limits
F
ig.
N
o.
134
__
Eef.
Itr.
B
C
B-C
Point
of mea
sureme
nt
Dep
th o
f
i
mpe
ller
bor
es in pum
p
hous
ings:
pump housing.
pu
mp h
ousing
.
Le
ngth
of im
pellers
:
pe
llers.
pe
llers.
p
ellers
a
nd
housi
ng
with
pump
bolted
tigh
t (both
pu
mps).
Siz
es and
fits o
f
new
p
arts
1.628
to
1.
630
1
.503
to 1.50
5
1.62
5 to
1.62
6
1.50
0 to
1.50
1
0.002
to
0.005
Wear
li
mits
1.633
1.5
08
1.6 2
2
1.497
0.008
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Pig.
No.
13
4
13
4
134___
134
134 _
Eef.
Itr.
D
A
A-
D
FF
GG
FF-G
G
C
B
B C
K
E
E-K
DD
Y
Y
DD
Poin
t o
f measure
ment
O D
of
pres
sure pump
end
of
driven
im
pell
er shaft
.
ID
of small
bor
e in
press
ure
pu
mp h
ous
ing
.
Fit of s
haft in
hous
ing.
OD
of
be
aring
surf
ace
on
press
ure pump
e
nd
of
pressu
re
pum
p
driv
e impe
l
ler.
I
D of
larg
e bore
in
pres
sure pump
hous
ing.
Fi
t
of
impe
ller
in
hou
sing.
M
ajor di
amete
r
of
all
im
peller
s.
ID of
all
impe
ller
b
ores in
both
hous
i
ngs.
F
it radi
al clea
rance
)
of im
pellers
in
hous
ing.
ID of
driven impellers-
OD
of
im
pelle
r bear
ing surfa
ces
on
driv
en
impell
er s
haft.
Fit of
impell
ers o
n
shaft.
O
D
of
bea
ring
surfac
e
on
shaft
o
f p
ressu
re
pump
drive
impeller.
I
D of
sc
aveng
er
pu
mp
d
rive
impel
ler.
Fit of
impell
er
on
sha
ft.
Size
s and fi
ts of
ne
w parts
0
.8116 to
0.812
0
0.8
120
to
0.813
0 _ _ _ _
O O O O
O L to 0.0
014L
0.
9350
t
o
0.93
56
0.9
370 to
0.938
0 _ _ _
_
0.0014
L to
0.0030
L
2.3306
to
2.33
10 _ _
_ _
2.3350
to
2.3360
___
_
0.0020
L
to
0
.0027L
0.8197
to
0.8202
____
0
.8171 to
0.8
175 _ _ _ _
0
.0022L
to
0.0
031L
0.8192
to
0.81
96
0.81
97
t
o
0.82
02
0.00
01L t
o 0.001
0L
We
ar
limits
0.81
00
0.8
14 6
0.00
30L
0.9330
0.94
00
0.0050
L
2.32
90
2
.3 376
0.003
5L
0.8216
0.8
15 7
0.0045
L
3
09
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Cont d
.
Fig.
N o.
134
_ _ _
134
134
1
34
Eef
. Itr.
F-
J
EE
Z
Z
-EE
G
L
G-L
CO
X
X-CC
Point of measurem
ent
OD of
larg
e bearin
g
on
oil
pump
driven
imp
eller shaft.
ID
of bore
in
oi l
pum
p
separ
ator plate.
P
it of shaft
in plate
__
OD
of
lar
ge b
earing
on
shaft of
press
ure
oil p
ump drive
im
peller.
ID
of bore in
oil
pum
p
sepa
rator
p
late.
Fit of shaft
in plate
OD
of bea
ring surface
on
scave
nger pum
p
en
d of d
riven im p
el
ler
shaft.
ID
of
bearing
in scav
e
nger pu
mp hou
sing.
Fit of shaft
in
ho
using-
OD
of
be
aring
surface
on sc
avenger
pump
end
of
drive
impel
ler.
ID
of
bearing
in s
cav
enger
pump housing.
Fit o
f impeller
in
housing
.
Size
s and
fits of
ne
w parts
0.9991 t
o 0.9995 _ _ _
_
0.9995
to 1.0005
O O O O O
L to 0.0014L
0.9978
to 0.9982
_ _ _ _
0.9995
to 1
.0005 _ _ _ _
0.0013L
to
0.00
27L
0
.8116
to 0.8120 _ _
_ _
0.812 0
to
0.8130_ _ _ _
O O
O O O L to 0.001
4L
0.8103 t
o
0.81
07
_ _ _ _
0.81
20 to 0.8130
_ _ _
_
0.00
13L t
o
0
.0 027L
Wear
limits
0.9975
1.0
021
0.0 0
30 L
0
.9955
1.00
28
0.
0050L
0.8100
0.8146
0.0
030L
0.8080
0.8153
0.0050L
Fig.
N o.
134_
_
R
ef.
Itr.
E
S
E-
S
Poin
t
of meas
urement
OD
of
gear
_ _ _
ID o
f
be
aring
in scav
enger
p
ump h
ousing.
Fit of gear
in
hous
ing.
Si zes a
nd fits of
n
ew
pa
rts
1.2480
to
1.2 485
1.2500 to 1
.2510 _ _ _ _
0.00
15L t
o
0
.0 030L
Wear
lim
its
1.2 46 5
1.2525
0.004
5L
310
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Con
t d.
Fig.
No.
121
Eef. Itr.
C-D
Point of
measurem
ent
Desi
red backlash
(at
m
ean
dimension)
with
press
ure pump
dr
ive
bevel gear
.
Total
backlash.
_ _
Sizes
and fits of
ne
w
parts
0
.0080 to
0.0120
—
0.0065 t
o 0.0135
W
ear
lim
its
0.0174
Fig.
No.
13 4
Eef. Itr.
N
P
N-P
C-D
Po
int of
m
easurement
OD o
f gear _ _
ID
of bearing
in
dr
ive
bevel
gea
r
supp
ort.
Fit o
f gear in
support-
mean
dim
ension)
with pres
sure pum
p
driven
bevel
g
ear.
Total
backlash
_ _ _
Si
zes and fits of
new parts
1
.2480 to 1.2
485 _
1.2500 to
1.2510 _ _ _ _
0.
0015L to 0.0030
L
0.
0080 to
0.0120
0.0065
to
0.0135
_ _ _ _
Wear
li
mits
1.2465
1.25
25
0.00
45L
0.0174
/.
Fig.
No.
1 3 4_
_
134 _
134 _ _
Eef.
Itr.
u
T
T
U
Q
Q-T
V
M
M-V
Poin
t
of
me
asurement
ID of
dow
el hole
in
scavenger
pump
housing.
OD o
f
drive
bevel
gear
su
pport dowe
l pin.
Fit
of
pin
in housing
ID
of
dowe
l
hole in
drive
be
vel
gear
support.
Fit
of pin in sup
port
ID
of outlet line hole
in
scavenger pump
housing.
OD o
f
co
nnecting end
of
scaveng
er
pump
outle
t line.
Fit of line in
housing
Sizes and fits of
new parts
0.2
490 to 0.250
0 _
0.250
1 to 0.2503
0.0001T
to 0.0013T
0.2500
to 0.2510__
0.0009L
to 0.0003T
0
.8745 to 0.8
755 _
0.8700
to 0.8740 _
0.0005L
to 0.0055L
Wear
limits
311
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R
P
D
8
6
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15
6
c c e
s s o r y
Cas e
S
cavenger
Oil Pum p
par. 75)
Fig.
No.
135
_
_
Kef.
Itr.
D
G
D-G
Point
of
measurement
Dept
h
o
f impelle
r bore
in
hous
ing.
L
ength of imp
ellers
End play
between
im
pellers a
nd housin
g
with
pump
bolted
tight.
Sizes and fits
of
n
ew parts
1.6
280 to 1.6300
1.6250
to
1.6260
0 0020L to 0.0050L
Wear
limits
1.6330
1.6230
0.0080L
Fig.
No.
135 ___
135
__
_
135
Ref. Itr.
L
B
B
-L
F
D
D
-F
G
H
G
-H
Poin
t of
measu
rement
OD
on
externa
l
spline
o
n dr
ive im
peller.
ID
of inter
nal spline
in bevel
gear.
Fit
of gear on
impel
ler
spline.
OD of sha
fts of both
impe
llers both
ends).
ID of
impeller
shaft
bore
s in cover
and
housin
g.
Fit o
f shaft of impel
le
rs in
cover and
housing.
Major OD of b
oth
im
pel
lers.
ID
of
both impeller
bo
res in hous
ing.
Fit
radial
clearance
of
impellers
in
ho
us
i
ng.
Sizes
and fits of
new par
ts
0.7885
to 0.7910
0.83
00 to 0.8400
0
0390L to 0
0515L
0.810
0 t
o
0.8106 ___
_
0.8120
to
0.8130
0 0014L to 0.0030L
2.3306
to
2.3
310
____
2.3350
to
2.3 360 ____
0 00
20L
to
0.
0027L
Wear
l
imits
0.8 080
0.8150
0 0050L
2.3290
2.33
76
0 0
035L
313
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l
A
1
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c
Fig.
j
N o.
13 5
135 _
121
Ref. Itr.
A
C
A-
C
B
L
B-L
N-P
P
oint of
measurement
ID
of gear bore in
co
ver.
Fit
of
gear in cover.__
ID of
internal
spline
in bevel gear.
on
drive
impel
ler.
ler
spline.
Desired
backlash (at
mean
dimension)
with
starter driv
e
bevel
gear.
Total ba
cklash
Sizes and
fits of
new
parts
1.1220
to
1.1230
1
.1250 to 1.1260 ____
0.002
0L to 0.0040L
0
.8300 to 0.8400 _
0.7885
to
0.7910
0.0390L
to 0.0515L
0.0080
to
0.0120
__
0.0060
to 0.0140
____
Wear
lim
its
1.1205
1.1275
0.0 055L
0.0179
Fig.
No.
135
135
Re
f.
Itr.
K
J
J-K
E
E
-J
Point of
measurement
ID
of
dowel holes
in
housing.
O D
of
dowel
pins
Fit
of pins in hous
ing.
ID
of
dowel
holes
in
cover.
Fit
of
pins in cover__
Sizes and
fits
of
new
parts
1.2480 to
0.2490
_
0.2501 to
0
.2503 _
0.0011T to 0.0023T
0.2500
to 0.2510- _
0.0009L to 0.0003T
Wear
limits
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157.
C o o l
i n g Fan an d
Fan Clu tch
A s s
em b ly
(par. 77)
a.
Fi
g.
No.
136-
136_....
Ref.
Itr.
D
E
D
E
G
Q
G-Q
Point
of
measurement
I D
of
out
er
housing
O D of outer hub
ball
bearing.
Fit of
beari
ng
in hou
s
ing.
ou
ter
housin
g.
O D of dow
el pin
Sizes and fits of
new
parts
2.8336 to
2
.8 346
_
2.8341
t
o
2 .8
346
0.0005L to 0.0010T
0.2835
to
0.2845
0.2810
to 0.2815
0 .0020L
to
0
.0035L
Wear
limits
Fig.
No.
136 _
136_
Ref. Itr.
N
K
K
N
P
Q
P-Q
Point
of
measurem
ent
O D of
inner hub ba
ll
bear
ing.
ing.
ID of dow
el
h
ole in
housing.
O D of dowel
pin
Sizes and fits
of
new
parts
2.6774
to 2.6782
2.6767
to 2.6772
0.000 2 L
to 0.0015L
0.2835 to 0.2
845
0
.2 810 to 0.
2815
0 .0020
L
to O.OOS
5L
Wear
limits
Fig.
No
.
136-
145
Eef.
Itr.
C
E
C-E
Poin
t
of
measur
ement
Small I
D of hub
O D
of hub
end of
fan
drive
ve
rtical
s
haft.
Fit of hub
on shaft___
Sizes and
fits
of
ne
w
p
arts
0.9845
to
0.9865
0.9835
to 0.9840
____
0 .0005 L to
0.0030
L
Wear
limits
0.9815
0.
9885
0.0050L
316
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C ont 'd
.
Fig
.
N o.
13 6
1 3 6 _
Ref.
H r.
B
J
B-
J
H
F
F H
Point
of mea
surement
O D of
lar
ge en d of
hub-
ID
of inner hub
ball
be
aring.
Fit
of hub i
n inner
bearing.
O D of
small e
n d o
f
hub.
ID
of outer
hub ball
bearing.
Fit o
f hub i
n ou
ter
b
earing.
Siz es and
fits of
n ew p
arts
1.5748 to
1.5753-
1 .5743
to 1 .5 7 4
8
O O O O O T to
0 001
0T
1.3770
to
1.3775
1 .3
7 7 5 to 1 .3 7 8
0
O O
O O O L to
0 0010L
Wear
limits
Fig.
N
o.
13 6__
Re
f. Itr.
L
Q
L-
Q
Point
of m
easurement
ID of
dow
el hole
in
driven d
isk.
O
D of
dowel
pin
Sizes and fits
of
ne
w
parts
0
.2 8 3 5 to
0 .2 8 4 5
0 .2 8 1 0
to 0 .2 8 1
5
0 0020
L
to
0 0
035L
Wea
r
limi
ts
Fig.
N o.
1 3 6
Ref.
Itr.
R
Q
Q
-p
oint
of
measurement
adapter.
Fit o
f
pin
in
adapt
er
Sizes
a
nd fits
of
n ew
parts
0 .
2 7 9 5 to
0 .2 8 0 5
0 .2 8 1 0
t
o 0 .2 8 1
5
_
0 . 0 0 0 5 T to
0 0
020T
Wea
r
limits
/.
•Fig.
N
o.
1 3 6 _ _ _
Ref. Itr.
A
P
oint of measure
ment
Sp
herical
d
iameter
o
f
ball.
S
iz es
a
nd fits
of
n ew
parts
0.62 45 to
0 .6 2 5 5
Wear
limits
(*)
31
7
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C
J
R
P
D
8
6
2
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Fig.
N o.
136
Ref.
Itr.
M
Point of meas
urement
Maximum
free
length
of
spring.
Scale rea
ding
at .
63 0
in
length
.
S
izes
nnd fits
cf
new part
s
1.10
0.0550
36
to
40 Ib
Wear
limits
1
58. Thro t t l e L i n k
ag e
(par.
80)
Fig.
N o.
137
13
7
Ref.
Itr.
D
A
A-D
C
B
B -C
P
oint
of
measurement
O
D
of
cross shaft
Fit of bearin
g
on
shaft
port bracket.
S iz
es and fits
o f
new parts
0.624
0 to 0.6245
0.
62 47 t
o
0
.6250__ _
0.0002L to
0.0010L
1
.3 738
to
1.3748 _
1.3745 to 1
.3750.
0 .0 0 0 3L to
0.0012T
Wear
limits
Fig.
N o.
138
138
Ref. Itr.
D
A
A-D
C
B
B
C
Point
of measurement
trol shaft.
Fit
of
b
earing
on
sha
ft
ID
of
control
shaft
support
bracket.
OD
of bal
l
b
earing
bracket.
Sizes and
fits of
new
parts
0.62
40 to
0.624
5
0.6247 t
o
0.6250
0
.0 0 0 2L
to
0.0
010L
1.3748
to
1 .3756
1.3745
to 1.3750—
0.00 1 1 L
to
0.00
02T
W
ear
limits
3
19
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R
P
D
8
6
3
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c.
Fig.
No.
139
139
139
139
Ref. Itr.
F
A
A-P
D
D-F
B
B-C
E
B-E
Point o f measurement
port.
ID
of
ball bearing
lever.
OD of
ball bearing
lever.
Sizes
and
fits of
new
parts
0.6240 to 0.6245
0.6247 to 0.6250
0.0002L to 0.0010L
0.6300 to 0.6400 _
0.0055L to 0.0160L
1.3748
to 1.3756
1.3745
to
1.3750
_
0.0011L to 0.0002T
1.3748 to 1.3756
0.0011L to 0.0002T
Wear
limits
RA PD
322
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t
N
C
H
E
R
P
D
8
6
6
C
O
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159. Oil Pressure C on t ro l Valve
(par. 82)
Fig.
No.
140 _ .
Ref. Itr.
A
B
A-B
Point of measurement
OD
o f
valve
stem
ID of valve stem
hole
in
housing.
Fit o f
stem in
housing-
Sizes
and
fits of
new
parts
0.2420
to 0.2460-
0.2490
to
0.2404 ____
0.0030L to 0.0085L
Wear
limits
0.2385
0.2540
0.0120L
Fig.
No.
140__
Eef. Itr.
D
C
C-D
Point of measurement
OD
o f
valve spring
seat.
ID
of valve
spring seat
in
housing.
Fit o f seat in housing-
Sizes and fits
of
new parts
1.2470 to 1.2475
____
1.2500
to 1.251 0 ____
0.0025L
to 0.0040L
Wear
limits
1.2450
1.2530
0.0060L
Fig.
No.
140 _ .
Ref. Itr.
E
Point
of
measurement
Maximum
sol id
height
Sca l e reading
at
2.25
i n ch
length.
Sizes
and
fits of
new parts
2.91 .
2.00
.
107 +
5
Ib _
Wear
limits
160. Oil Fi l ter
Bypass
Valve
83)
Fig.
No.
141
Ref. Itr.
A
B
A-B
Point
of
measurement
OD
o f
valve stem
ID
o f
valve
stem hole
in
housing.
Fit o f stem in
hous ing_
Sizes
and
fits
of
new
parts
0.2420
to
0.2460
0.2490 to 0.2505____
0.0030L to 0.0085L
Wear
limits
0.2385
0.2540
0.0120L
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P
D
1
w
U
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Fig.
No.
141
Ref. Itr.
C
Point of measurement
length.
inch
length.
Sizes and
fits
of
n
ew parts
2.16
1.06
27.7
+
2.5 Ib
Wear
limits
161. Oil
C o o l e r
P ressu
re B y p a s s
Valve
(par. 84 )
Fi
g.
No.
141_
Eef.
Itr.
A
B
A-B
Po
int
of measurement
O D
of
valve stem
ID of valve stem
hole
in housing.
Fit
of stem
in housing.
Sizes
and fits
of
new
parts
0.3070
to
0.3090
0.3115 to 0 .3135
_ _ _ _
0.0025L to 0.0065L
Wear
limits
0.3015
0.3 1 9 0
0.0120L
Fig.
No.
1 41
Ref. Itr.
C
Point
of measurement
M
aximum free
length
M
aximum
solid
height.
Scale
reading at 1.75
in length.
Sizes
and
fits
of
new p
arts
2 .10
1.36
96 .5 + 9 .
5 Ib
Wear
limits
162.
Fl
ywhee l Group
(par. 87)
Fig.
No.
1 3 2__
Ref.
Itr.
T
F
F-T
Point of
measu
rement
ID
of dowel
hole
in
flywheel.
O
D
of
f
lywheel dowel
pin.
Fit
of pin in fl
ywheel_
Sizes and fits of
ne
w part
s
0 .6245 to 0.6255 _
_ _ _
0.6255 to
0.6257 _ _ _ _
O . O O O O T
to
0.0012T
Wear
limits
(*)
*)
*)
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Cont d
.
F
ig.
No.
1
32
143
143
143
Ref.
Itr.
V
J
E
E
J
H
B
B-H
G
F
F
G
Point
of measu
rement
bore
in
flywheel.
O
D
of flywh
eel end
of
cranksh
aft.
Fit
of
flywhe
el
in
cra
nkshaft
.
ID
of cover
plate
do
wel pi
n hole in
flywhe
el.
OD
of
c
over
plate
dowel
p
in.
Fit o
f
pin
in
flywh
eel
flang
e on
flywhe
el.
O
D
of fly
wheel c
over
p
late.
flywh
eel.
d
owel pin
hole in
fly
wheel.
do
wel p
in.
Size
s
and
fits
of
ne w
parts
7.
0000
to 7.0010
6.998
5
to
6 .
9995
0
.0005L
to
0.
0025L
0.436
5
to
0.43
75
0.4376
to
0.4
378
0.
0001T
to 0.00
13T
18.1
25 to
18.1 2
7
1
8.122
to 18.12
4
0.0 0
1L
t
o 0.00
5L
0.499
5 to 0.
5005
0.5 0
09 to
0.5011
0
.0004T
to 0.0
016T
Wear
limit
s
6
.
Fig.
No
.
14 3
143
Kef.
Itr.
M
E
E
M
B
H
B-H
Poin
t of
mea
suremen
t
ID
of d
owel
hol
e
in
cove
r plate
.
OD
of c
over
pla
te
dowel
pin.
Fit
of p
in
i
n p
late
flang
e on f
ly wheel
.
flywh
eel.
Sizes and
fits
of
new
par
ts
0.4380
to
0.43
90
0.4
376
to
0.4378
0.0002
L
to
0.0014
L
18.1
2 2
to 18.124
18.1
25 to
18.127
0.0
01L
to 0.005
L
W
ear
l
imits
3
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i g
No.
143
1
43 _
Re
f.
Itr.
L
N
L-N
C
D
C
-D
Point
of me
asurem
ent
dam
per
hub a
nd
spr
ing drive
n p
late.
OD
of hu
b
d
owel
pin
Fit
of
pin in hu
b and
plat
e.
S
mall O
D of da
mper
hu
b.
ID
of damp
er
sp
ring
dr
iven
plate.
Fit o
f pl
ate on h
ub
Si
ze s an<
new i
0.4990
to
0.5001
to
0.0
001T
tc
2.124
to
2
2.1
25
to
2
O O O O
L
to
fits
of
3ar ts
0.5000
-
0 .5003
0
.0013T
.1
25 _
.1 26 —
-
0.002L
Wear
lim
its
Pig
.
No.
143
R
ef. Itr.
K
Point
of meas
urement
F
ree len
gth
of drive
sp
ring.
M axim
um so
lid heigh
t
in
leng
th.
Sizes
and fits
of
ne w part
s
1 .7
82 to
1.7
97
1 .375
_
3
8 to 56
Ib
_ _ _
We
ar
limit
s
1
63
Valve
Ro c
k ers
pa
r. 89)
F
ig.
No.
144
_
144
Ref. Itr.
F
E-F
G
J
G
-J
Poin
t of
m
easurem
ent
ID of
roller
O
D o
f ro
ller hub
Fit
of
hub in
ro
ller _
_ _ _
O ut
side width o
f roller_
Ins
ide wid
th of
valve
roc
ker.
Fit
o
f ro
ller in ro
cker_
Sizes and
fi
ts of
new p
arts
0
.5625 to 0
.5630-
0.5 5
80
t
o
0.5585
0.00040L
to
0.0050L
0.3060
to
0.30
80
0.3 11
5
t
o 0
.3 135
0.0035
L
t
o 0.00
75L
Wear
limits
0.5650
0.5
560
0.0070L
0.
3035
0.31
60
0.01
00L
32
9
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O
t
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Fig.
No.
3n
144
Ref. Itr.
N
M
M
-N
A
B
A B
Poi
nt
o
f measur
ement
OD
of
rocker
shaft
Fit
of bearin
g
on shaft
-
Fit
of be
aring in ro
ck
er.
Siz
es
and
fits of
new parts
0.749
5 to
0.750
5
0.7480
to
0.7485 _ _ _ _
0.
0010L to
0.0025L
0.8
780
to 0.8790
0
.8745
to
0.8755
0.0025T
to
0.004
5T
Wear
limits
0.7530
0.7455
0
.0050L
Fig.
No
.
144
Ref. Hr
.
C
H
P
oint of measu
rement
ID
of
roll
er
axle pin
hole
in val
ve rock
er.
Sizes and
fits
of
new
parts
0.3
120 to 0.313
0
0.3120
to 0.3 1
30
Wear
li
mits
3
31
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Cont
d.
Fig.
No.
144
Eef.
Itr.
C H
D
C-D
Point of
measurement
Fit of pin in
rocker .
F
it
of
pin in hub
(roller hu
b
also
locked to pin).
Sizes and f its
of
new parts
0.00
10L to 0 .0010T
0.3115
to 0.3125
0.0005L to
0 .0015T
Wear
limits
164.
C o o l i n g
F
an
D r i v e
(par.
95)
Fig.
No.
145
12
1
Ref. Itr.
J
H
H-J
E
-F
Point
of measurement
ID
of drive
gear
hear
ing.
Fit
of
gear in bearing
.
me
an
dimensio
n)
with
fan
driven
bevel gear.
Total backlash
__
Sizes and f its
of
n e w
parts
1.372
5
to 1.373
0
1.3750
to
1.3760
__ __
0.0020L to
0 .0
035L
0.0100 to
0.0140
0.0084 to 0.015
8
Wear
limits
1.3705
1.3780
0.0055L
0.0197
Fig.
No.
145
_
__
145
__
Eef.
Itr
.
L
M
L-M
G
Point of measure
ment
ID of
lower
driven
gear
pilot.
OD
of
lower gear bear
ing on drive
vertical
shaft.
Fit of gear
on
shaft
ID
of upper drive
gear
pilot.
Sizes
and
fits of
new parts
0.9 360 to 0.9370
0.9350
to
0 .9355 ____
0.0005 L to
0 .0020L
1.2500 to
1.2510
Wear
limits
0.9390
0.9330
0.0040L
1.2530
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Cont
'd.
Fig.
No.
121_
Ref. Itr.
N
G-N
F
Point
of
measureme
nt
OD
of
upper gear
bearing
on drive
vertical shaft.
Fi
t
of ge
ar on s
haft
_
_
mean
dimensi
on)
with
fan driven bev
el
gear.
Total backlash
Sizes and fits of
new parts
1.2490
to
1.2495
_ _ _ _
0.0005L
to
0.0020
L
0.010
0 to 0.0140
0.0084
to
0.0158 _ _ _ _
Wear
limits
1.2470
0.0040 L
0
.0197
Fig.
No.
1
4 5
14 5
14 5
1
4 5
14 5
Eef.
Itr.
M
K
K-M
L
L-M
N
G
G -N
F
P
F
-P
R
Point
of meas
urement
OD of
bearin
g on lo
w
er end
of vertical
s
haft.
ID
of vertica
l shaft
be
aring in crank-
case.
Fit
of
shaft in bearin
g.
ID
of fan dr
iven
bevel
gear
lower pilot.
Fit
of
gea
r on sha
ft__
OD
of
gear upper
bearin
g on vertical
s
haft.
ID of driven gear
up
per
p
ilot.
Fi
t of
gear
o
n
s
haft
_ _ _
OD
of
l
arge bearing
surfa
ce on vertical
shaft.
ID of inner
oil
slinger_
Fit
of slinger
o
n
sha
ft-
ID
of vertical
shaft
ball
bearing.
Sizes
and
fits o
f
new parts
0.9350
to
0
.9355 _ __ _
0.9370 to 0.9380
0.00
15L to 0.0030L
0.936
0 to 0.9370 _ _ _ _
0.0005L to 0.0020L
1.2490
to
1.2495 _ _ _ _
1.2500
to
1.251
0
0.0005L to
0.0020L
1.3779
to
1.3784
1.3780
to
1.3790
0.0011L to 0.0004T
1.3775
to
1.3780
Wear
lim
its
0.9330
0.940
0
0.0050L
0
.9390
0
.0040L
1.24 70
1.2530
0.0040L
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Cont'd.
Fig.
No.
145
145
_ _ _
136 _
_ _
Eef. Itr.
F
E
S
F-S
E
C-E
Point of measurement
Fit
of
bearing
on
shaft_
ID
of
vertical shaft
oil
seal.
Fit of sea
l on shaft
O D of small
(upper)
end of
vert
ical
shaft.
ID
of
fan
drive hub_
Fit
of
hub
on shaft
_ _ _ _
Sizes
and fits of
new parts
0.0001L
to
0.0009T
1 .3800 to 1 .3820
0.0016L
to 0.0041L
0 .9835
to
0.9840 _ _ _
_
0 .9845
to
0.9865
__
0.0005L to 0.0030L
Wear
limits
0 .9815
0.9885
0.0050L
Fig.
No.
145
145
132
Eef. Itr.
D
C
C-D
A
A-Q
Point
of measurement
ID of
bearing housing.
ball
bearing.
ing
.
O D of
bearing housing
bore
in crankcase.
crankcase.
Sizes and
fits of
new parts
2 .8345
to
2.8353
2.8340
to 2.8346
_
0.0013L
to 0.0001T
4.7480
to
4.7490
4.7500
to 4.7510
0.0010L
to 0.0030L
Wear
limits
Fig.
No.
145
Ref.
Itr.
A
B
A-B
Point of measurement
housing.
shaft oil seal.
Fit of sea
l in
housing
.
Sizes and
fits of
new
p
arts
2 .6 2 3
to
2 .625
2
.628 to 2.634
0.003T
to 0.011T
__
We
ar
limits
(*)
(*)
(*)
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/.
Fig.
No.
13 2 .
Ref.
Itr.
H
J
H-J
Point of measu
rement
ing.
ID of
bore in
crank-
case.
Pit of beari
ng
in
crankc
ase.
Sizes and fits
of
n
ew parts
1.6 875
to
1.6 880
1.6 880
to
1.6
890
O O O O O L
to 0.00
15L
Wear
limits
Fig.
N
o.
132_
132_
Eef. Itr.
L
M
L -M
K
N
K
-N
P
oint of
meas
urement
OD
of be
aring
ID of bore
in
crank-
case.
Fi
t of bearin
g
in
crankcase.
pin
.
ID of b
earing d
owel
pin
hole
in cr
ank-
case.
c
ase.
new
parts
Sizes and fits
of
1.
2 495
to 1.250
0 _
1.25 0 0
to
1.2
5 10
O O O O
O L to
0 0015L
0 .1850 to 0 .1
8 70
0 .1 835 to
0.1845 _
0.0005T to
0 0035T
W
ear
limits
165.
Hot s p
o t Ou
tlet and
V a c u u
m Heat
C o
n t ro l
(par.
97
)
F
ig.
No
Eef.
Itr.
Point of measureme
nt
Si
zes and fits o
f
new
p
arts
Wea
r
limits
ID
of bore
in housing
for
contro
l
le
ver
shaft
sho
rt beari
ng.
O
D o
f con
trol lever
shaf
t
short b
earing.
0 .6870
to
0.6880-
0 .68 8 5
to
0.
6890-
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Cont'd.
Fig.
No.
146_
Re
f.
Itr.
K
J-K
Point
of measurement
ing.
ID of
b
ore in
housing
for co
ntrol lever
shaft long
bearing.
lever shaft bearing.
ing.
Sizes
and fi
ts
of
new p
arts
0.0005
T to 0.0020T
0.6870 to 0.6880 _
0.6885
to
0.
6 8 9 0
0.0005T
to
0.002
0T
Wear
limits
Fig.
No.
146
146
_ _ _
Ref. Itr.
F
L
F-L
E
E-F
Point of meas
urement
O D of control
lever
sh
aft.
ID
of
contro
l lever
shaft
sho
rt
bearin
g.
Fit of
lever shaft in
bea
ring.
ID
of
control l
ever
shaft
long bearing.
Fit of
shaft
in
bea
ring-
S
izes
and
fits o
f
new
parts
0.4300
to
0.4305
0.4365
to
0.4385 _ _ _ _
0.0060L
t
o 0.0085
L
0.4365 to 0.4385 _ _ _ _
0.0060L
to 0.0085L
Wear
li
mits
0.
4285
0.4400
0.010
0L
0.4400
0.0100L
Fig.
No.
14
6
Ref. Itr.
B
A
A-B
Point of measureme
nt
I
D
of p
in hole in
con
trol
valve
(at gage
dimension
li
ne).
O D
of
tapered
pin
(at
gage
dimension
line
)
Fit
o
f pin
in valv
e
(
at
gage
dim
ension).
Sizes
and fits of
new pa
rts
0.115
to 0.135
_
0.115
to
0.135
0.020L to 0.020T
Wea
r
limi
ts
337
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t
o
C
0
R
P
1
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F
ig.
No.
14 6
Ref.
Itr.
G
H
G-H
Poin
t
of
measurement
control
lever.
OD of
control le
ver
rivet.
Sizes and
fits
of
new parts
0.126 to
0.130 _ _
0.124 to
0.128 _ _ _
0.006
L
to
0.002T
W
ear
limits
FiB
.
No.
146
_
Ref. Itr.
M
Point of measurem
ent
length of sp
ring.
of spring.
pound
s
load.
Sizes
and
fits
of
n
ew parts
6.18
1.63
2.06
3.90 in
-lb
Wear
limits
166.
Hydraulic
Governor
(par.
137)
Fig.
No.
126 _
14 7
__
147__
Ref.
Itr.
w
A
A-W
J
E
E J
C
A
A-C
Point
o
f measurement
Pilo
t OD o
f
governor
bo dy.
Pilot ID of
camshaft
drive housin
g.
F
it
of
body in housing-
ID of hydraulic
valve
s
leeve in
governor
body.
OD o
f hydra
ulic valve_
Fi
t
of
valve in body
— _
ID
of piston
bore in
governor body.
F
it of piston in bod
y__
Sizes and fits of
new par
ts
2.997 to
2.999
3.000 to 3.001_
0 .0
01L to 0.004L
_
0
.8 125
to
0.8135 _ __ _
0.8112 to 0.8117 _
_ _ _
0.0008
L
to
0.0023L
1.9995
to 2.0005 _ _ _ _
1.9980 to 1.9990- _
0.000
5L
t
o 0.0025L
W
ear
limits
0.8145
0.
8092
0.0 05
0L
2.0025
1.9970
0.0050L
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I
N
C
H
E
S
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Fig.
No.
126_
_
126
147 _
Eef.
Itr.
V
D
D-V
U
E
E-U
H
G-H
Point
of
mea
surement
O D
of governor drive
shaft
on
lower
race.
ID of
drive shaft
hole
in
governor driven
bevel gear.
Fit of shaft
in gear ___
Distance across
flats
of square end
of
drive
shaft o
n
low
er
race.
Distance
across
flats in
square hole in gov
ernor driven bevel
gear.
Pit o
f
square shaft
in
gear.
O D of
shaft
on
lower
race.
ID
of
shaft bore i
n
upper
race.
Fit of lower
to upper
race.
Sizes a
new
0.6240 to
0.6250 to
0
0005L
0.304 to
0.3
12
to
0.006L to
0.433 to
0.4365
to
0.0015L
nd fits
of
parts
0.6245
0.6260 ____
to
0.0020L
0.306 -
_
0.314
_
0.010L
0.435
_
0.4390
to
0.0060L
Wear
limits
0.6220
0.6280
0.0040
L
n 9Q Q
0.
319
0.0
15L
0.431
0.4415
0.0080L
Fig.
No.
14
7
Ref. Itr.
Point of measurement
O
D of actuating ball
Sizes
and
fits of
new parts
0.6255 to 0.6245____
We
ar
limits
0.6
195
Fig.
N
o.
147 -
147
Eef. Itr.
D
B
Point of
measurement
Oil niet
ering
valve
spring.
Piston compression
spring.
Sizes and fits
of
new parts
28
Ib
at 1.300 in
±
35
Ib
+ 5
Wear
lim
its
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Cont'd.
Fig.
No.
148
148
Ref.
Itr.
H
Point o
f
measurement
Solid height
Sizes and
fits
of
new
parts
20 Ib at 0.670
in +
5 .
0.88-0.86
3.6 Ib at
0.610 in
•
5 .
Wear
limits
Fig.
No.
1
48
148
Eef.
Itr.
L
G
G-L
K
J
J K
Point of
mea
surement
Fit of
rod in bushing
piston
hea
d.
Fit
of
bushing in h
ead
Sizes
and
fits of
new parts
0.5010 to
0.5020
0.4995 t
o 0.5005
0.0005L to
0.0025L
0.6270 to 0 .
6280
0.6255 to
0.6265
0.0005T to 0 0025T
Wear
limits
0.506
0.4945
0.00
80L
/.
Fig.
No.
148
148
Ref.
Itr.
c
B
B-C
D
E
D
-E
Point
of
measurement
ID
of
bushing
O D
of
rocker arm
sha
ft.
Fit of
shaft in
bushing-
clev
is.
Si
zes
and fits
of
new
parts
0.4390
to 0.4400
0.4350
to 0.4355 ____
0 0035L
to
0 0050L
0.565 to 0.566
0.563 to
0.564—
0.001T
to
0.003T _
Wear
limits
0.4420
0.4
345
0 0080L
Fig.
No.
148
Ref. Itr.
A
B
A-B
Poi
nt
of measurement
O D of
rocker arm
shaft.
Fit of shaf
t in
arm
Sizes
and
fits of
new parts
0.4340 to 0.4350
0.4350
to 0.4355
O O O O O T to
0.0015T
Wear
limils
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1
67 Eng in
e T
o rq ue Wrenc
h
Speci f i
ca t io ns
pa
r. 1 0 2 )
(0.25
00).
(0.312
5).
(0
.3750).
(0.437
5).
J
(
0.5000).
A (0
.5625).
7 5
t 1
1
5
t
1 7 5
2 7
5
t
3 2 5
4
t 4 5
5 5
t
6
8
t
8 5
Fig.
N
o.
1 1 0
_
127- _
1 3 0
1 Q fi
1 Q9
1 3 0
1 3 2
— _
1 3 2
1 3
2
132- _
.
1
^9
1 3 2
1 3 3
1 3 3 _
.
143-
-
-
143- —
K ef
.
Itr
.
H
JJ
H
D
P
K
G G
Z
R
P
Q
s
E
E
U
Q
M
P
A
Location
Spark plug
s _ _ _
_ _
Sup
ercharge
r impeller
nu
ts
_ —
__
Co
nnecting rod
bo
lt
_
_ _ _
Cr
ankcase c
ross
bolts_
Cran
kcase
to crank
case bolts
(fan
tower, s
hort).
tow
er, lon
g) ( )
.
fl
ywheel
end)
(
A).
Crankca
se stud nut (in
side f
lywheel
hou
sing).
Damper
hub
mounti
ng
bolts
_
_
Torqu
e
(I b- i
n )
2 0 0 to
2 2 5
70 0
3 5 0
to
40 0
1 70 to
1 80
7 5 0
to
8
5 0
7 2 5 to 7
75
175
1 75
3 0 0
4 0 0
to
45
0
1 5 0
to
1 7
5
1 ,
0 0 0
2 75
to
3 2 5
1
,000
3
0 0
40 0
t
o 45 0
44
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APPENDIX
REFERENCES
1.
Pub l ica t ion Indexes
The f o l l ow ing publication
indexes
and
lists o f
current i s sue
should be consu l t ed frequently for latest changes or revisions o f
references g iven
in
this
appendix
and
for
n e w publications
relating to
materiel
covered in
this
manual:
Index o f
Administrative
Publications____ S R 310-20-5
Index o f
Army
Mo t i o n
Pictures,
Film Strips S R 110-1-1
and Kinescope R e co r d i n g .
Index o f Training Publications________ S R 310-20-3
Index o f Blank Forms and Army Personnel
S R
310-20-6
Classi f icat ion Tests.
Index o f
Technical Manuals ,
Technica l Regu- S R
310-20-4
lations, Techn ica l Bulletins, Supply
Bul le
tins, Lubrication
Orders,
Modif i ca t ion
Work
Orders, Tables o f Organization and Equip
men t , Reduction Tables,
Tables
o f Al low
ances ,
Tables o f Organization and Tables
o f
Equipment.
Introduction and Index (supply catalogs) _____ ORD 1
Military
Training
Aids_______________ FM21-8
Ordnance Major
Items and
Combina t i on s
and
Perti- S B 9-1
nent
Publications.
2.
S u p p l y Cata logs
The
f o l l ow ing maintenance
and repair
catalogs of the Depart
ment o f the Army Supply Catalog
pertain
to this materiel:
Antifriction Bearings and Rela ted Items
ORD
5 S N L H-12
Cleaners , Preservatives, Lubricants, Re- ORD
3
S N L K-l
coil
Fluids,
Spec ia l
Oils,
and Related
Main t e n an c e
Materials.
Electrical Fittings _____________ ORD 5 S N L H-4
Items of
Solder ing , Metal l iz ing ,
Brazing, ORD
3 S N L
K-2
and
W e ld in g Materials;
Gases
and
R e
lated Items.
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Lubric
ating Equi
pment,
Ac
cessories, OR
D (*) SNL
K-3
and Related
D
ispensers.
L
ubricating
F
ittings, Oil
Filters,
and
Oil
O
RD 5 SNL
H-16
Filter Ele
ments.
Major
Ite
ms and Majo
r
C
ombinatio
ns
of
OR
D 3 S
NL G-l
Group
G .
M
iscellaneou
s Hardware
___
______
O
RD5SNL
H-2
Oi
l Seals ___
______
______
___
ORD 5
SNL H-13
Pipe
and Hos
e
F
ittings_
_______
___ OR
D 5
SNL H-6
Sho
p
Set,
Auto
Fue
l
a
nd Elec-
ORD 6 S
NL J-
8,
Sect
ion 12
trica
l System
, Field Mainte
nance.
Shop
Set, Com
bat V
ehicle
R
e- O
RD 6
SN
L
J-9,
S
ection 9
build
Company,
Depot
Main
tenance.
Sh
op Set,
Eng
ine
R
ebuild
Com- O
RD 6 SNL
J-9, Se
ction 3
pan
y (Automo
tive) D
epot
M
aintenance
.
Shop
Set, Headq
uarters
an
d ORD 6 S
NL J-
9,
S
ection 2
S
ervice Company
,
D
epot
Main
t
enance,
Automotiv
e or Arma
ment.
Sho
p Set, Mai
ntenance
(Field
)
ORD
6 SNL
J-
8,
Section
13
A utomo
tive.
Shop S
et, W
elding Fie
ld M ainte-
ORD 6
SNL
J-8, Section 8
nance.
Standard Hard
ware
_____
______
_
ORD5S
NLH-1
Tool
S
et, Aut
o
Fuel
an
d Elec-
ORD 6 SNL
J-10
, Section
8
tri
cal System
Repairma
n
(
MOS3912
).
Tool Set, G
eneral Me
chanic's
ORD
6 SN
L J-1
0, Section 11
Too
l
Set,
Ma
intenance (Fie
ld), OR
D 6 SNL
J-8, Sec
tion 7
M o
tor Vehicle
A s
sembly
Com
pany.
3. Form
s
The follow
ing
forms pert
ain
to
this materiel:
W D
AGO
Form 9
-1, Materiel
Inspecti
on Tag
DA
AGO F
orm 9-3,
Process
ing Record for
Shipme
nt
and
Sto
rage of
Vehicles and
Box
ed Engin
e (T
ag)
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W D A G O
Form
9-4, Vehicular
Storage and Servicing Record
(Card)
W D A
G O Form 9-71,
Locator
and
Inventory Control Card
W D A G O
Form
9-72, Ord nance Stock
Record
W D A G O
F
orm
9-76, Request
for
Work Order
W D A G O Form
9-77, Job Order Register
W D A G O
F
orm 9-78, Job Order
DA AG O Form
9-79,
Pa
rts Requ
isition
W D
A G O Form
9-80,
Job
Order
File
W
D A G O
Fo
rm 9-81, Exchange
Part or Unit Ident
ification
Tag
DA
Form
447,
Turn
-In
Slip
DA
Form
460,
Preventive
Maintenance
Roster
DA Form 461-5,
Limited Technical Inspection
DA
A G O
Form 446,
Issue
Slip
D
A
Form 468, Unsatisfactory
Equipment Report
DA
Form
478, M WO and Major
Unit Assembly Rep
lacement
R
ecord
and
Organizational Equipme
nt
File
DA
Form
811, Work
Request
a
nd Job Order
DA
Form
811-1,
W o
rk
Request
and Hand Receipt
W D
A G O
Form
865,
Work
Order
W D A G O
Form
866, Consolidat
ion of Parts
W D
A G O
Form
867,
Status
of Modif icat ion
Work Order
DD
Fo
rm 6 ,
Report of
Damaged
or Improper Shipment
DD
Form
317,
Preve
ntive
Maintenancee
Ser
vice D
ue
4
Oth er
P u b l i ca t i o n s
The following
explanatory
publications contain
information
pertinent
to this
mate
riel and
associated equipment:
Camouflage, Basic P
rinciples___ _____ FM 5-20
Camouflage of Vehicle
s______________ FM 5-2
0B
Decontam
ination
___
_______________ TM
3-220
Decontamination
of
Armored
Force
Vehicles__
FM
17-5 9
Defense Against
Chemical Attack________ FM
21-40
Explosives and
D
emolitions —_—_____
_ FM 5-25
O
rdnance Service
in the Field___________
_ FM9-5
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C ooling System:
Vehicles
and
TM 9-285
8
Powered
Ground Equ
ipment.
Fuel
s and Car
buretion___
__________
_
TM 10-550
Inspec
tion of
Ordnance Materiel i
n TM
9-110
0
Hands
of
Troops.
Instruct
ion Guide
: Operation and
TM 9-285 5
Mainten
ance of Ordnanc
e Materiel
in Extre
me Cold 0° to —65° F.).
Military Veh
icles ___
_________
_____ TM 9-
2800
Motor Transport
_______
_________
_
FM
25-10
Mou
ntain Operations
FM 70-1
0
Operations
in
S n ow
and Ex
treme old___
FM 70-15
Ordnance Field
Maintenance_________
FM 9-10
P
recautions
in
Handling Gasol
ine_____——
AR
850-20
Pr
eparation
of Ord
nance Materiel for
TM
9-285 3
Deep-Water
Fordin
g.
Principles
of Automotiv
e Vehicles
_______
TM 9-2700
Re
port of Accident Experienc
e_______ S R
385
-10-40
Spa
rkPlugs ___
_________
_______ TB O
R D 313
Storage Batteries—L
ead-Acid Type_
_____ TM
9-2857
Supplies
and
Equipment: Unsatisfactory
S R
700-45-5
Equipment Report
.
Su
pplies
and Equipment
:
Mot
or Vehicles__
AR 700-10
5
Abr
asives, Cleaning
, Pr
eserving, Sealing, Ad- TM
9-8 5 0
he
sive,
and Related Mate
rials Issued for
O rdnance Materi
el.
Hand, Measuring,
and Power
Tools______
TM
10-590
Instructio
n
Guide:
Care and Mai
ntenance
o f
TM 37-265
B
all and
Roller Beari
ngs.
Instruction
Guide: W
elding Theory and
TM 9-2852
Applic
ation.
Lubr
ication _____
_________
______ TM
9-2835
M
aintenance a
nd Care of Hand To
ols______ TM
9-8 67
Maintenance
Supplies a
nd Equipm
ent:
Main-
AR 750-5
tenance Responsibilities and
S hop
Operation.
M od
ification of
Ordnance
Materie
l--—_______ S B 9-38
O r
dnance Mainte
nance: Carb
uretors
TM
9-1826A
,
B,
C D
O r
dnance Maintena
nce: Electri-
TM 9-1825A, B,
C ,
D ,
E
cal E
quipment.
Fuel Pumps
_________
_________
_
TM
9-1828A
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Vehicular Maintenance Equipment, Grinding,
TM 9-1834A
Bor ing , Valve
Reseating Machines , and Lathes.
Painting
Instructions for
Field Use______
TM
9-2851
Parts Eeclamation from Tactical and
Ad- S R 750-130-10
ministrative Vehicles.
Preparation
of
Ordnance
Materiel
for
Deep-
TM
9-2853
Water Fording.
Preventive Maintenance
o f
Electric
M oto rs and
TM 55-405
Generators.
Suppl ie s
and
Equipment: Unsatisfactory S R 700-45-5
Equipment
Report.
/.
76 -mm Gun
Tank
T41E1_____________ TM 9-730
Army Shipping
Document_____________
TM 38-705
Instruction Guide: Ordnance
Packaging
and TM 9-2854
Shipping
(Posts, Camps,
and Stations).
Marking
and Packing
of Suppl ies
and Equip- S R 746-30-5
ment:
Marking o f
Oversea Supply.
Military
Standard—Marking
o f Shipments
MIL-STD-129*
Ordnance
Storage
and Shipment
Chart—
TB
9-OSSC-G
Group G.
Preparation
o f
Unboxed Ordnance
Materiel for S B 9-4
Sh ipmen t .
Preservation, Packaging, and
Packing
o f M ili- TM 38-230
tary
Suppl ie s and Equipment.
Protection o f
Ordnance
General Suppl ies
in TB ORD 379
Open Storage.
Shipment
of Supp l ie s
and
Equipment:
Re- S R
745-45-5
port of
Damaged
or
Improper
Sh ipmen t .
Standards for Oversea Shipment and Domes- TB ORD 385
tic I s sue
o f
Ordnance
Materiel Other
Than
A m m u n i t i o n
and Army Aircraft.
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INDEX
aragraphs
age
A
ccessories:
Drive ratios__________
______————
——————
33
4 5
Insta
llation. Individ
ual item.)
N
umber incl
uded on engine_____————
————————
33
4
5
Remo
val ___
___________
___________
____
36 4
7
Accesso
ry
case:
As
sembly fro
m subassem
blies_________
___———— 59 106
Cleaning
,
inspection a
nd r e p a i r _ — — —
— — — — — — — — — —
— 5 7
80
Description
_ _ _ _ _
_ _ ___——————
—— ———————
—— 24
40
Disassembly
_ _ _ _ _ _ _ _ _ _ _ _ — — ————————————
56
69
Installation
_____
____________
____________
107
215
Rebuil
d of subassemblies_
_ _ _ _ _ _ _ — — — — —
————— 58
85
Removal
_______
___________
____________
51 6
1
Accessory
drive
. Accessory
case.
)
Accessory
drive ratios.
Accessories.)
Adapter
, breather line,
accessory case:
Description
________
___________
_____—__ 26
4 1
Install
ation
_____
___________
___________
59 1
06
R e
build __________
___________
________
58
84
Removal
___________
___________
_______ 56
69
Adapter,
drive, fuel pump.
Housing, camsha
ft drive.)
Ada
pter, drive, generat
or.
Drive
g
enerator.)
Adapter,
drive, m
agneto. Housi
ng, magneto
drive.)
Adapter,
drive, starter.
Drive, starter.)
Adjustment.
Tests
and
adjus
tments.)
A
ir
deflectors .
Deflector
s,
ai
r, cylinder.)
Allocation,
field
and depot
m
aintenance____
________
2
2
Arrestor,
flame.
Tube, breather
,
carburetor-to-oil-f
iller.)
Aspirators.
Manifold,
intake.)
Assembly
of engine
from
subasse
mblies_______
_____ 102-128
208-241
Baffl
es, air, cylinder. De
flectors, air,
cylinder.)
Balance
tu
be, intake manifold
Induct
ion system):
Installation
__
___________
___________
___
114 224
R emoval
______
___________
___________
_
42
53
Bearings
,
ca
mshaft.
Cylind
ers.)
Bearings, connecting
rod:
Assembly _______
___________
__________
73 14 8
Cleaning,
inspection and repair__—
_———————
—
72 145
Description
__________
___________
______
2
0 38
Removal
___________
___________
_______
71
14 1
Bea
rings, main:
Cleaning, inspection
and
repair___
______————
— 69
13
7
Description
_
___________
___________
____
18
37
Installation
_
___________
__________
_____
103
209
R emoval _
__________
___________
______
55 66
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arag
raphs age
Bearings, p
iston
pin. Cr
ankshaft.)
Booster coil.
C oil, b
ooster.)
Bracket, gov
ernor control shaft:
Installation
___________
___________
______ 111
223
Removal ______
____________
___________
43 54
Breathing
system, description of____—______— —
26
41
Cam
shaft bearing
cap. C ap, ca
mshaft
be
aring.)
Camshaft gear
housing. Cam
shafts and gea
r
housin
gs.)
Camshaf
ts
and
drives. C
amshafts and gear hous
ings.)
Ca
mshafts and gear
housings:
Assembly ____
___________
___________
__
62
117
Clea
ning,
inspe
ction and repair_
___________—
_— 61
117
Descri
ption ________
___________
________ 23
40
Disassembly ________
___________
________ 60
116
Installation
___________________________
108 216
Removal
_______
___________
__________ 47 5
7
Cap, cam
shaft bearing
:
Des
cription
__________
___________
_______ 22 39
Installati
on __________
___________
______ 65
131
Removal _
____________
___________
_____ 63 122
Cap,
connecting rod.
Cranks
haft.)
Carbureto
r:
D
escription _
___________
____________
___ 4, 28
5, 43
Installat
ion ________
___________
________
112 224
R emoval
____________________________
36
47
Ca
rburetor elbow :
Descr
iption
_________
__ ________
_______ 4, 25 5, 41
Installation ___
___________
____________
_ 112 224
Rebuild
__
___________
___________
_____ 99
190
Removal
__
____________
___________
___
60
60
Caution:
Ignition
harness cleaning——
— — — — — — — _ _
____ —_ 90 1
78
Main bearings
____________
____________
__ 69 137
Trouble
shooting
___
___________
__________
14 24
Cleaning and
draining.
Preparation
of
engine
for
r
ebuild.)
C lutch, cooling
fan. Cooling
fan and fan
clutch.)
C oil,
booster:
Description _
___________
___________
____ 29 43
In
stallation ___
___________
__________
__ 120 232
R em
oval _______
_____—____
___________
36 47
C ommon
tools and
equip
ment. Parts,
special t
ools
and
equipment.)
C ompression. Trou
ble sho
oting.)
Connecting
rod.
Rod,
connecting.)
C onne
ctors,
inter-cylinder.
Camshafts and ge
ar hous
ings
.)
C oolers,
oi
l:
Description
_ _ — — — — — — — — — —
— — — — — — — — — — —
— _ — — 4, 15 5, 3
3
Rebuild
__
__————_————
————————_
——____ 100
190
Remova
l — —
— — — — — — — — — — —
— — — — — — — — — —
— — — —
36
47
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aragraphs
age
Cool
ing
fan
and fan clutch:
Assembly
_ _ _ _ _ _ _ _ _ _ _ _ — — — — — — — — — —
— — — — — — 7 8 15 9
Cleaning, inspection
and r e p a i r _ — — — — — — — — —
— — — — — —
77
158
Description __________ _ _ _ — — — — — — —
— — — — — — — 27
4 2
Disas
sembly _ _ _ _ _ _ _ _ _ _ _ — — — — — — — — — —
— — — — —
76
158
Installation
_________________———______
124 2 37
Remov
al _ _ _ _ _ _ _ _ _ _ _ _ _ _ — —
— — — — — — — — — — — — 3 7 , 38
51,
51
Trouble
shooting_______________—
——______ 14 2 4
Cooling
sy
stem,
description______
_____——______ 27
4 2
Covers,
shroud. Shroud
covers.)
C overs, valve rocker:
Description
_ _ _ _ _ _ _ _ _ _ _ _ _ — — — —
— — — — — — — — — — 2 2 39
Installation
___
________________—___
___
110 223
Removal
____________________
—______
4 5 56
Crankcase:
Assembly ______________—————______
103 209
Cleaning, inspection,
and
re
pair________________ 69
137
Description _ _ _ _ _
_ _ _ _ _ _ __ _ _ — — — — — — — — — — —
— 1
7 37
Disassembly _________
_________ _______
55
66
Crankshaft:
Assembly
_________
_ _ _ _ — — — — — — — — — — — — — — —
73
1
4 8
Cleaning, inspection,
and r e p a i r — — — — — — — — — — — —
— — — 72 145
Description ________
_____— — — — — — — _ — — — — —
19
37
D
isassembly ____________— — — —
— — — — — — — — — — —
7
1
141
End
play_______
______________________
103
209
Installation
_______________
_————_______
103 209
Re
moval ______________
____———_______
55 66
Cra
nkshaft
vibration
damper. Damper,
v
ibration,
crankshaft.)
Cylinders:
Assemb
ly
_
______________________
______ 65 131
Cle
aning, inspection,
and
repa
ir_______________
64
12 2
Descrip
tion
_____
______________________
22 39
Disassembly __________
_________________
63
122
Installation ___________________________
105 2 13
R
emoval
__________________
___________ 5 2
61
Cylind
er air deflectors.
Deflectors,
air, c
ylinder.)
Damper,
torsion
. F
lywheel.)
Dampe
r, vibration, crankshaft. Cranks
haft.)
Deflectors , air, cylinder:
Installation
_____________
______________
105 2
13
Rem
oval ________________
_____________ 4 4
56
Description and data________
________________ 15-33 3
3- 45
Diaphragm, acc
essory case:
Installation ______
_____________________
5 9 106
R
ebuild
_____
_____________________
___
5 8 84
Removal ______
______________________
_
5
6 69
Diffuser, supercharger:
Installat
ion
_
______________________
____
59 106
Removal
________________
_____________ 56
69
Disassembly of
stripped
engine into
subassemblies______
37-55
51- 66
352
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Drive, coo l i ng
fan:
Installation ___________________________ 104
211
Rebu i ld
_____________________________ 95
181
Re mova l
_____________________________ 54 65
Drive, generator:
Installation
___________________________
59
106
Rebui ld _____________________________ 58 84
Re mova l ____________________________
56 69
Drive,
governor and fuel pump. Housing
camshaft
drive.)
Drive,
main accessory. Accessory
case.)
Drive, starter:
Installation
___________________________ 59 106
Rebu i ld
_____________________________ 58 84
Re mova l ____________________________ 56 69
Elbow, carburetor. Carburetor
e lbow.)
Engine:
Description and
data____________________—
4 5
Nomenclature ______—__-_—______—__— 5
6
Trouble
shooting_______________________-
13-14 24, 24
Engine assembly from subassemblies__——_______. 102-128 208, 241
Engine nomenclature.
Engine.)
Engine
shroud. Shroud, engine.)
Exhaust manifold sections. Mani fo ld sec t ions , exhaust.)
Eye,
lifting,
accessory
case.
Adapter,
breather
l ine,
accessory case.)
Fan, coo l ing . Cool ing fan and fan clutch.)
Fan
drive.
Drive, coa l ing
fan.)
Filter,
fuel:
Description
___________________________
28 43
Installation ___________________________ 127
241
Rebui ld _____________________________ 98 188
R e m o v a l
_____________________________ 36 47
Filter,
oil:
Installation
___________________________
127
241
Rebui ld
_______________________—___—
98 188
Remova l
____—__————-_______——__
36 47
Filter,
primer:
Description _ _ — _ — _ _ — — — — — — — — — — — — — _ _ _ 28 43
Installation __—— —_—— ____—— —— —— —— —— —___ 118 229
Rebui ld ________-_____________—____ 98
188
Re mova l ____———-——————————————————— 36 47
Flame
arrestor. Tube, breather, carburetor-to-oil-filler.)
Flywheel:
Cleaning and
i n s p e c t i o n — — — — — — — — — — — — — — — — — — — —
87
175
Description — — — — — — — — — — — — — — — — — — — — — — — — — — — 19 37
Installation
— — — — — — — — — — — — — — — — — — — — — — — — — — —
103 209
Re mova l
— — — — — — — — — — — — — — — — — — — — — — — — — — — _ 53 63
Repair — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — 88
177
Forms,
records,
and
r e p o r t s — — — — — — — — — — — — — — — — — — — — 3 3
Fuel filter. Filter, fuel.)
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Fue
l pump. Pump, fuel.)
Fuel
pump
drive adapter. Housing,
camshaft
drive.)
Fuel system
:
Descriptio
n __
- _ — — — — — — — — — — — — — - — — — — —
— — —
2 8
4 3
Trouble
shooting
_ — — — — — — — — — — — — — — — — — — — — —
—
14
24
Gear failures, trouble shoo
ting o f — — — — — — — — — — — — — — — —
— — 1 4 24
Generator:
Description
_ _ _ _ _ — — — — — — — — — — — — — —
— — — — — — — 31 44
Installation _ _ _ _ _ _ _ _ _ _ _ _ _ — — — — — —
— — — — — — — — 121
2 3 5
Removal _ _ _ _ _ _ _ _ _ _ _ _ _ — — — — — — — —
— — — — — — —
36 47
Generating sy
stem. Generator.)
Trouble shoot ing___—————
— — — — — — — — — — — — — — — —
14 24
Gov
ernor and fuel pump driv
e. Housing
camshaft
driv
e.)
Governor,
hydraulic:
Adjustment
.
Run-in
test.)
Assembly __________
_———————————__—_—
138 2 5 0
Cleaning, inspection,
and
r e p a i r — — —
— — — — — — — — — — — — — 1
37 2 4 7
Description and data——_——
— — — — — — — — — — ————————16, 13
5 2 4 6
Disassembly _____
____-__——————_____—
1 3 6 2 4 6
Install
ation
_______
__________—————________
11
1 2 2 3
Removal _____________
————————______
36 47
Governor, spark advance:
Description _ _ _ _ _ _ — _ — — — — — — — — — — — — — — — — — — —
2 9
43
I
nstallation
_________________
——______ 5 9 1 0 6
Removal _________________
____________
56 6 9
Guides, valve. Cylinders.)
Harness,
ignition
. Ignition system.)
Cleaning and inspection__
__________________
90 178
Instal
lation ______________
_____________ 1 2 0 2 3 2
Removal _______________
______________
36 47
Ventilation
______________
_____________ 2 9 43
Hotspot
manifold. Manifold
section, exhaust.)
Hotspot
outlet housing.
Housing, hotspot
outlet.)
Housing,
bearing, fan drive vertical shaft.
Drive
,
cool
ing fan.)
Housing,
camsh
aft
dr
ive:
Installation _
_____________________
_____ 5 9 1 0 6
Rebuild
______________
_______________ 5 8 84
Removal ___________
__________________
56 69
Housing,
camshaft drive shaf
t. Camshafts and gear
housi
ngs.)
Housing,
camshaft
gear. Camshafts
and
gear
hous
ings.)
Housing, fan
outlet vane. Shroud, engine.)
Installation
______________________
_____
124
237
Removal
———______
___________________ 3
7 51
Housing, fan rotor.
Shrou
d, engine.)
Housing,
hots
pot outlet:
Installation
_______
____________________ 1 2 6 2 38
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aragraphs
age
Housing,
hotspot
outlet—Continued
.
Rebuild
___________
___________
_______
9 7 184
R
emoval ______
___________
___________
_ 37 51
Hous
ing,
ma
gneto
drive:
Installation _
___________
___________
____ 59
106
Rebuild
_____________________________
58 84
R e mo
val _____
___________
___________
__ 56
69
Housing
, oil control:
In
stallation
___________
___________
_____ 5
9 106
Rebuild
_________
___________
_________
58 84
R em
oval ____
___________
___________
___ 56
69
Housing,
oil seal,
fan drive vertical shaft.
Driv
e,
cool
ing
fan.)
Housing
, supercharge
r:
Installation
__________
___________
______
59 106
Removal
_______
____________
__________
56 69
Hydrauli
c governo
r.
Governor,
hydraulic.)
Hydrostati
c
lock.
Tro
uble shooting.)
Ignition harness.
Harness
, ignition.)
Ignition
system. Harness,
ignition):
Description _______
____________
_——______
4, 29
5, 43
Trouble
sh
ooting____—___
___—_————
————
14 24
Impeller supe
rcharger:
Insta
llation __
___________
___________
___ 59
106
Removal
_____________________________
56 69
Induction system:
D
escription
__
___________
____——___
___ 25
41
Trouble
shootin
g___________
____——____
__
14 24
Inserts, helico
il.
Cylinders.)
Inse
rts, Rosan
__________
___________
_______ 57 80
Inserts, valv
e
(seat).
Cylinders.)
Intake
manifold. Manifold,
int
ake.)
Line,
spill:
Installation
___________________________
115 224
Rem
oval _______
___________
___________
51 61
Lines, asp
irator:
Instal
lation __
___________
___________
___ 112
224
Removal
__________
___________
________
42 53
Lin
es,
breather,
ac
cessory
case.
Breathing sy
stem):
Install
ation _____
___—-—————
—_——————
_
112
224
Removal
________
___________
-________
50 60
Lines, fuel:
Inspection
and
r e p a i r
_ — — — — — — — — — —
— — — — — — — — — _
9 6 184
Removal
— — — — — —
— — — — — — — — — — —
— — — — — — — — — — —
36 47
Lin
es, oil cooler.
Coolers, oil .)
Line
s,
primer:
Installation
— — — — — — —
— — — — — — — — — — —
— — — — — — — — —
118
229
Removal
— — — — —
— — — — — — — — — — —
— — — — — — — — — — —
— 46 57
Lines, ve
nt.
Breathing
system)
Inspection
and r e p a i r — — —
— — — — — — — — — —
— — — — — — — —
96 18
4
355
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L
inkage,
throttle.
Throttle linkage.)
L
ubrication system
:
D
escription
_____
______________
———————
4,15
5 , 33
Trouble
shooting__
______-_————
————————
— 14 24
Magneto.
Ignition system)
Descriptio
n _______
____-__—————
——_—————
4 ,
2
9 5 ,
4 3
Installatio
n __________
_______———___
_—————— 109
218
Remo
val ____________
__——————
—————
36 47
M
agneto dri
ve adapter.
Housing, magneto d
rive.)
Magn
eto drive housin
g. Hou
sing,
mag
neto d
rive.)
Main accessory
drive
.
A
ccessory
case.)
Mai
n bearings.
Bearings, main.)
Manifol
d, hotspot.
Manifold
section, exhaus
t.)
Manifo
ld,
intake
:
Installation
_______________-_—————————
116
225
Rebuild ____________
____________
________
91 179
Removal _
___________
____________
___—
4 2
5 3
Man
ifold,
oil drain,
cyl
inder
head:
Install
ation _____
______________
__——————
117
225
R
ebuild ____
__________
___________
____
92
18 0
Remova
l
__
___________
___________
_____
4 1 5 3
M
anifold
section, exhaus
t:
Ins
pection
and
repa
ir______________
_———————
93 180
Ins
tallation
__________
__________
_______ 122 235
Rem
oval
_____________________________
4 0
5 3
Noise
trouble
shooting
____________
____________
__ 1
4 24
Nomenclature
.
E
ngine.)
Oil control housing
. Housing,
oil control.)
Oil
coolers. Coolers, oil
.)
Oil cooler bypass
valve
. Valve, by
pass, oil cooler
(thermo
static)).
Oil drain
man
ifold. Manifol
d, oil drain, cylinder
head.)
Oil
filler
pipe.
Pipe,
oil
filler,
crankcase.)
Oil filter. Filter,
oil
.)
Oil filter bypass
valve. V
alve,
bypa
ss,
oil
filter.)
Oil pan. Pan,
oil.)
O
il press
ure
contr
ol
valv
e.
Valve, oil p
ressure
con
trol.)
Pan, oil:
Description
____
____________
____________
_ 17
37
In
stallation
_______
___________
_________ 114
224
Rebuild
_________
___________
_________ 86
174
Removal _______
____________
__________
4 9
60
Parts, special
tools, an
d
equ
ipment
(maintenance).
Pin, pis
ton:
Descriptio
n
____
___________
___________
_
21
38
Rebuil
d. Pistons.)
Pip
e, oil
filler
, crankcase:
Installatio
n
___
___________
________„__
__ 12 5
237
Removal _
____________
___________
_____
39 53
356
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aragraphs age
Pistons:
Assembly ____________________________ 68
137
Cleaning, inspection, and repair________________ 67 135
Description _____________________.._____
21 38
Disassembly __________________________ 66 134
Installation
___________________________
105 213
Eemoval
_____________________________
52 61
Piston
pin. Pin, piston.)
Piston
ring. Ring, piston.)
Plug, oil transfer. Shaft, drive, camshaft.)
Plug, piston pin. Pistons.)
Plugs,
spark. Spark
plugs.)
Power
take-off:
Installation ___________________________ 59
106
Rebu i ld __________________j.__________ 58
84
Re mova l _____________________________ 56 69
Preparation o f
engine for rebuild:
Cleaning and
d r a i n i n g - — — — — — — — — — — — — — — — — — — — — 35 46
General _____________________________ 34
46
R emova l o f
accessories____________________
36 47
Primer
filter. Filter, primer.)
Primer l ines .
Lines, primer.)
Pump ,
fuel:
Description
___________________________ 28 43
Installation
___________________________
111 223
R e m o v a l _____________________________
36
47
Pump,
oil, scavenger, accessory
case:
Description
______————————_——————————— 4,15 5, 33
Installation ___________________________ 113 224
Rebu i ld
_____________________________ 75
157
R e m o v a l _____________________________
48 59
Pump, oil, scavenger and pressure
(dual unit):
Description
___________________________ 4,15 5, 33
Installation ___________________________
106 214
Rebu i ld
_____________________________
74
151
R e m o v a l
_____________________________ 51 61
Rad io interference filter. Coil, booster.)
Re mova l o f accessories. Accesso r i e s and individual
items.)
Repair
and
rebuild
standards:
Accesso ry
case
and
subassemblies mating bores and
140 252
pilots.
Accesso ry
case diaphragm and impeller shaft
assembly—
142
263
Accesso ry
case
drive
gearing-——______——————
141 256
Accesso ry case scavenger oil
p u m p _ _ _ _ _ — — — — — — — 156
313
Camshaft
and
drive, left (2-4-6) side___________ 150
287
Camshaft and drive, right (1-3-5) side__________ 149 282
Coo l i ng fan and fan clutch a s s emb ly_ _ _ _ _ _ —————— 157 316
Coo l i ng fan drive_________________————__ 164
332
Crankcase ____________________———————— 153
299
357
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Repair a
nd rebuild standard
s—Continued.
Cr
ankshaft and connecting
rod assem
bly————————
—
154 3
02
Cylinders
__
___________
_________-__
___
151
291
Eng
ine torque wrench
specifications————
———————— 167
34 4
Flywheel
group_____
______________
_—————— 1
62 326
Generator drive ad
apter assembly——————
———————
14 4 268
Governor
drive, fuel
pump, and cam
shaft
d
rive housing-
146
2
74
Hotspot
outlet and
vacuum
heat
con
trol—————————
— 165 336
Hydra
ulic governor_________
—————————
—————
166 339
M
agneto drive
housing
assembly__———
—————————
145 2
71
Oi
l cooler
pressure
bypass
valve___———
_——————
161 326
Oil filter
by-pass
valve___
_____________
_——— 160 324
Oil
p
ressure
con
trol va
lve___ _———————
—— ————— 159 324
Piston
s _______
___________
________——
152 296
Power
take-off
drive
assembly_____———————————
-147
278
Sc
avenger and
pres
sure
o
il
pump
(dual unit)——
————— 1
55 308
Starter
d
rive asse
mbly___ _ _ _ _ _ _ _ _ —
— — — — — — — —
— 143 265
Superchar
ger
impeller, diff
user, and housing—
——————
148 279
Throttle linkage__
___________
___________
158 319
Valve ro
ckers________
_____ ________
_______— 163
329
Ring, piston
:
Des
cription _______
____________
_____———
21 38
Rebuild. Pistons.)
Rocker box covers.
Covers, valv
e
ro
cker.)
Rocker,
valve:
C
leaning, inspection
and repair______
__________
89
177
Descrip
tion
________
___________
________ 22 3
9
Installation
____________
___________
_____ 108 216
Re
moval __________
____________
_______
4 7 5 7
Rod, connec
ting:
Desc
ription _______
____________
_____———
20 38
R
ebuild. Crankshaft
.)
Remov
al __________
___________
_______ 5 5
66
Rosan in
serts. Inserts, Ros
an.)
Rotor,
cooling
fan.
Cooling
fan
and
fan
clutch.)
Run
-in test:
Engine
r\m-in_
____________
___________
__
13
3 243
Gove
rnor adj
ustment _________ _
_________———
134 2 4 4
Preparation
for f
un-in_______
___.________—
132 243
Screen, oi
l cooler. C
oolers, oil.)
Screw,
adjusti
ng, valv
e
rocker
. Rock
er valve.)
Seal,
o
il, crankshaft.
Cr
ankshaft.)
Sei
zure of part, trouble
shooting____
____________
_ 14 24
Sending
unit
and switches:
Descrip
tion
________ __
___________
_____ 32 4 4
Instal
lation ________
_________.._„
________ 5 9
106
Re
moval ________
_____:______
__________
5 6 69
Shaft, driv
e,
cam
shaft:
Installatio
n _______
___________
_________ 10
9
218
Removal _
____________
____________
______ 4 7
5 7
358
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aragraphs Pa
ge
Shaft, fa
n drive, horizontal:
Installation ________
___________
________
104 211
Removal ___
___________
____________
___ 51 61
Shaft, fan
drive,
vertical.
Drive,
cooling
fan.)
Shaft, v
alve rock
er .
R o
cker,
valve
).
S hr
oud
c
overs:
Installa
tion ________
____________
_______
123 235
R emoval ___
___________
____________
___ 37 51
S h
roud,
engine:
Cleaning
and
inspection___
____________
______
94 181
Installa
tion ___________
___________
_____
123 235
R em
oval _________
___________
_________
37 51
Spark plu
gs:
Disconnectin
g
s
park
pl
ug leads______
_________ 36
47
Installation
___________________________
120
232
R emoval ___
___________
____________
___ 63
122
Spec
ial tools
and equipment. Parts,
special to o
ls,
and
equi
pment.)
Spring
s, valve:
Descrip
tion ______
___________
__________ 22
Rebuild
. C
ylinders.)
Start
er.
Starting system.)
Description
_______
________—_
_ _______ 30 44
Installation
___________
___________
_____ 121
235
Removal
____________________________
36
47
S
tarting system.
Starte
r.)
Trouble
shooting_—___
—________—_
———_ • 14
2 4
Studs:
Data ____
___________
____________
____ 101
199
Identification __
—__—_____
___—______
_ 101 199
Replacem
ent_____ __
____________
________ 57 8
0
Sump,
accessory case:
Installat
ion
___—
—__—______
__———_____
__ 115 2
24
R ebuild ___
___________
___________
____ 86 174
Removal
_____________________________
48
59
Supercharg
er. Induction
system.)
Sup
port,
camshaf
t drive
shaft. Ca
mshafts and
gear
housings.)
Switch, sending,
high temperature w
arning
light.
Send
i
ng switches and unit.)
Switch, se
nding,
low
pressu
re war
ning
light.
Send
ing
switches
and unit.)
Tables:
Run-in
s c h e d u l e — — — — — — — — — — — — — — — — — — — — — — — —
133 243
Special
tools
and equip
ment for field and
de
pot
main
tenance
— — — — — — — — — —
— — — — — — — — — — —
— — — — — — — 10 9
S
tuds _
__-__————————
——————————
——————
101 199
Tabulated data__
_——————————
——————————
————
6,
33
8, 45
Tests
and
ad
justments:
A ccessories — —
— — — — — — — — — — —
— — — — — — — — — — —
— — —
131
242
359
7/18/2019 TM9-1730A Engine 1952
http://slidepdf.com/reader/full/tm9-1730a-engine-1952 370/370
ar
agraphs age
T
ests and
a
djustments—
Continued.
Oil
pressure
_ __ _ _ _
_ — — — — — —
— — — — — — —
— — — — — —
129 24
2
T
hrottle li
nkage_____
—————
—————
____— 130
2 42
Throt
tle linkage:
Assembly
_ _ _ _ _ _ _ _
— — — — — —
— — — — — —
— — — — — —
81 165
Cleaning, inspection,
and
r e p a i r — — — — — — — — — — — — — — —
80 163
Dis
assembly _______—
——_——
——-———
__——
79 162
Inst
allation ________
_—__——
—_——
_____ 11
9 2 3 0
Remo
val _____
______—
————_
___—____
__ 43,50 54,6
0
Timin
g
_
_______
________
____—_
_—_____
_
109 2 18
Tools.
P
arts, sp
ecial tools, and
equipme
nt.)
Torque:
Specification
s
_
_______
________
________
__
167 34 4
T
ightness ___
_______
________
_______
___
102 2 0
8
Torsion d
amper.
Flywheel.)
Transmitter,
tachometer:
Inst
allation ____
________
_______
________
128 241
Remov
al
___
________
_______
______ _
___
3 6
47
Troub
le
s
hooting:
Detail
proce
dures____
________
________
____
14
2 4
Engine ______
________
________
________
__ 13
2 4
General instruction
s a
nd
proc
edures___
________
_ 12
23
Purpose
____
________
_______
________
__ 11 2
3
T
ube, b
alance, intake mani
fold.
Balance
tube, intake
manifold.
)
Tube,
breather,
carburetor-to-oil-filler.
(See
Breathing
sy
stem.)
Installati
on _______
_______
________
_____ 125
2 3 7
Remova
l ________
________
________
_______
3 7 5 1
Tube,
breath
er,
crank
case.
Bre
athing sy
stem.)
Instal
lation _____
_______
________
_______
12 5 2
3 7
Rem
oval _______
________
_______
_______
3 9 5 3
Unit,
send
ing, oil high
pressure ga
ge.
Sending switc
hes
and
un
it.)
Valves,
air-metering
, descriptio
n_______
________
__ 2 6
41
Valve, bypass,
oil cooler
:
Desc
ription _
________
________
_________
____ 15 3 3
Install
ation _
_______
________
_______
____ 5 8
84
Rebuild
_____
_______
_______
________
__ 8 4 1
72
R
emoval ____
________
_______
________
__ 36 , 58 47 ,
84
Valve,
bypass, oi
l cooler (thermo
static):
Description
_____
________
_______
_______
15 3 3
Inspectio
n
__
_______
________
_______
____
85 174
Installation
_____.______________________
100 190
Removal ______
_______
________
________
100 19 0
Valve, bypass, oil fi
lter:
D
escription _
_______
________
_______
____ 15
3 3
In
stallation _
________
_______
________
___ 5 8
84
Re
build __
_______
________
_______
_____ 8
3 172
Remo
val
_
________
________
_______
_____ 36,5
8
47,84
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