NC8

301

thru

NC8

312

SHO

P AS

SEM

BLY

00-1

286B

PAG

E 7

-31

V36

G74G

76

G82

G82

V39

X04

G73

BEL

T D

RIV

E A

SSEM

BLY

Bea

ring

Ass

embl

y

Inst

all t

aper

ed e

nd o

f fan

shaf

t G76

thro

ugh

bear

ing

G82

with

col

lar

on b

earin

g to

war

d en

d of

sha

ft. A

ttach

lock

ing

colla

r G76

into

slot

on

fan

shaf

t. In

stal

l sec

ond

bear

ing

on o

ppos

ite e

nd o

f fan

shaf

t with

col

lar

away

from

end

of sh

aft.

Atta

ch t

his

asse

mbl

y to

fan

bear

ing

chan

nel

G73

. Atta

ch f

an b

earin

g ch

anne

l ass

embl

y to

Hfr

ame

G51

.

Fan

Bear

ing

Col

lar

V19

G73

G51

Figu

re 7

-34a

Figu

re 7

-34b

X04

Find No.

Des

crip

tion

V19

1/2"

x1 1

/2"

Bolt

V39

3/4"

x 3

1/2"

Bol

tX0

31/

2" N

utX0

43/

4" N

ut

NC8

301

thru

NC8

312

SHO

P AS

SEM

BLY

00-1

286B

PAG

E 7

-32

W30

X04

G68

G67

G69

G66

G69

BEL

T D

RIV

E A

SSEM

BLY

Mot

or P

late

Slid

e stif

fene

r cha

nnel

s G66

&G

67 u

nder

fla

nges

on

mot

or p

late

G68

as

show

n.

Inst

all u

bolts

G69

arou

nd h

fram

e tub

e and

thro

ugh

mo-

tor

plat

e. D

o no

t tig

hten

nut

s at t

his

time.

Figu

re 7

-35

Find No.

Des

crip

tion

W30

3/4"

Fla

t Was

her

X04

3/4"

Nut

NC8

301

thru

NC8

312

SHO

P AS

SEM

BLY

00-1

286B

PAG

E 7

-33

Inst

all

adju

stm

ent

rod

G70

by

inse

rting

it

thro

ugh

Hfr

ame

tube

, ins

tall

2-3/

4" n

uts a

nd 1

-3/

4" fl

at w

ashe

r,bet

wee

n m

otor

pla

te a

nd tu

be, a

ndth

en th

read

it th

roug

h th

e nu

t on

the

mot

or p

late

stif

feni

ng c

hann

el a

nd o

ut t

he f

ar e

nd o

f th

eH

fram

e. I

nsta

ll 1-

3/4"

flat

was

her a

nd 2

-3/4

" nut

son

eac

h en

d. J

am th

e nu

ts ,

on e

ach

end,

and

jam

them

toge

ther

.

BEL

T D

RIV

E A

SSEM

BLY

Adj

ustm

ent R

od

X04

W30

W30

V12

X02

X04

W30

G70

Figu

re 7

-36

X04

Find No.

Des

crip

tion

W30

3/4"

Fla

t Was

her

X04

3/4"

Nut

NC8

301

thru

NC8

312

SHO

P AS

SEM

BLY

00-1

286B

PAG

E 7

-34

Figu

re 7

-37

BELT

DR

IVE

MO

TOR

INST

ALL

Inst

all m

otor

to m

otor

pla

te a

s sho

wn.

A B

DC

Mot

orFr

ame

A

213T

& 2

15T

1 3/

8 "

254T

& 2

56T

1 7/

16"

284T

& 2

86T

2 1/

2"32

4T &

326

T3

1/2"

364T

& 3

65T

4 7/

8"40

4t &

405

T3

1/2"

Mot

or A

tach

men

t Har

dwar

e

Mot

orFr

ame

Find

Num

bers

AB

CD

213T

& 2

15T

V09

W22

W02

X02

254T

& 2

86T

284T

S &

286

TSV2

2W

23W

03X

03

324T

& 3

65T

& 3

24TS

V30

W29

W04

X05

404T

thru

449

TV3

3W

30W

05X

04

Find No.

Des

crip

tion

V09

3/8"

X 1

1/2

" BO

LT

V22

1/2"

X2

1/2"

BO

LT

V30

5/8"

X 2

1/2

" BO

LT

V33

3/4"

X 2

1/2

" BO

LT

W02

3/8"

LO

CK W

ASH

ER

W03

1/2"

LO

CK W

ASH

ER

W04

5/8"

LO

CK W

ASH

ER

W05

3/4"

LO

CK W

ASH

ER

W22

3/8"

FLA

T W

ASH

ER

W23

1/2"

FLA

T W

ASH

ER

W29

5/8"

FLA

T W

ASH

ER

W30

3/4"

FLA

T W

ASH

ER

X02

3/8"

NUT

X03

1/2"

NUT

X04

3/4"

NUT

X05

5/8"

NUT

NC8

301

thru

NC8

312

SHO

P AS

SEM

BLY

00-1

286B

PAG

E 7

-35

Figu

re 7

-35a

BELT

DR

IVE

ASS

EMBL

Y IN

STA

LL

G78

Not

requ

ired

onN

C83

05.

Rem

ove

the

top

bolt

ofK

brac

e cl

ip to

inst

all

Find

No.

G78

.

Kbr

ace

Clip

Kbr

ace

Fan

Bear

ing

Cha

nnel

Inst

all B

elt D

rive

asse

mbl

y on

to M

.E.

beam

s as s

how

n.R

emov

e to

p bo

lt of

Kbr

ace

clip

and

inst

all

fan

bear

ing

chan

nel d

iago

nal G

78 b

etw

een

clip

and

Kbr

ace.

The

oth

er e

nd o

f the

dia

gona

l will

alig

n w

ith o

ne o

f the

thre

e ho

les a

t the

top

ofth

e fa

n be

arin

g ch

anne

l. T

his i

tem

not

requ

ired

on N

C83

05.

On

NC

8309

inst

all f

an b

earin

g ch

anne

lst

iffen

er G

79 to

M.E

. bea

ms a

nd fa

n be

arin

gch

anne

l as s

how

n in

Fig

. 7-3

5b.

X03

V18

Find No.

Description

V18

1/2"

x1" B

olt

V19

1/2"

x1 1

/2" B

olt

X03

1/2"

Nut

X03

V19

Figu

re 7

-35b

G79

X03

X03

V18

NC

8309

onl

y

NC8

301

thru

NC8

312

SHO

P AS

SEM

BLY

00-1

286B

PAG

E 7

-36

Iden

tify

fan

shea

ve M

22 o

r M24

and

bus

hing

M23

, bei

ng u

sed,

and

obt

ain

inst

alla

tion

dim

ensi

on "A

" fro

m c

hart

on th

is p

age.

The

fan

shea

ve is

alw

ays

the

larg

er o

f the

two

driv

e sh

eave

s an

d w

ill h

ave

3 to

8 g

roov

es.

All

fan

shea

ves

are

"rev

erse

mou

nted

" on

the

bush

ing

(fast

ener

s th

read

ed in

to b

ushi

ng) a

s sh

own.

Thor

ough

ly c

lean

the

exte

rior o

f the

bus

hing

and

the

tape

red

bore

of t

he s

heav

e. N

icks

, bur

rs, d

irt, a

nd c

hips

sho

uld

be re

mov

ed, s

ince

they

can

cau

se a

loss

of c

once

ntric

ity a

nd e

ven

grip

ping

stre

ngth

. D

o no

t use

oil,

gre

ase,

or a

ntis

ieze

com

poun

ds o

n bu

shin

g su

rfac

es, s

heav

e bo

re o

r sha

ft. C

heck

key

siz

e w

ithbo

th s

haft

and

bush

ing

keyw

ay.

Slid

e th

e bu

shin

g on

to th

e sh

aft (

with

bus

hing

hub

aw

ay fr

om e

nd o

f sha

ft) a

t dim

ensi

on g

iven

in ta

ble

and

tight

en s

et s

crew

. D

o no

t for

ce b

ushi

ng o

nto

the

shaf

t. If

it d

oes

not g

o on

eas

ily, c

heck

the

shaf

t, bu

shin

g, a

nd k

ey s

izes

. D

o no

t spr

ead

bush

ing!

Inse

rt sh

eave

loos

ely

over

bus

hing

with

the

unth

read

ed h

ole

of th

e sh

eave

mat

ched

with

the

bush

ing'

s th

read

ed h

oles

. D

o no

t pre

ss o

r dr

ive.

In

sert

caps

crew

s th

roug

h th

e sh

eave

and

thre

ad b

y ha

nd in

to th

e bu

shin

g. T

ight

en th

e ca

pscr

ews

prog

ress

ivel

y w

ith a

torq

ue w

renc

h us

ing

quar

ter t

o ha

lf tu

rns

at a

tim

e,m

ovin

g ar

ound

the

bush

ing

flang

e in

the

sam

e di

rect

ion

until

the

a to

rque

of 2

2 fo

ot p

ound

s is

reac

hed.

(Th

is to

rque

val

ue is

for a

lum

inum

she

aves

. Fo

r cas

tiro

n sh

eave

s us

e th

e to

rque

val

ue s

uppl

ied

with

the

bush

ing.

) D

o no

t atte

mpt

to p

ull t

he b

ushi

ng fl

ange

flus

h w

ith th

e sh

eave

sur

face

. Th

ere

shou

ld b

e a

clea

ranc

e ga

p w

hen

tight

ened

to s

peci

fied

torq

ue.

Inst

all f

an s

heav

e re

tain

er M

30.

BEL

T D

RIV

E A

SSEM

BLY

Step

One

Det

ails

Fan

She

ave

M23

Fan

bush

ing

M22

Fan

shea

ve

Fan

shaf

tO

ut o

fbu

shin

g

End

offa

n sh

aft

ABu

shin

gse

t scr

ew Bush

ing

hard

war

e(in

clud

ed w

ithbu

shin

g)

Figu

re 7

-39

M30

W03

V18

Fan

Shea

ve In

stal

latio

n D

imen

sion

Fan

Shea

veM

odel

A

18.4

x5B-

EN

C830

41

1/4"

NC8

305

0"

25.0

x5B-

EN

C830

41

1/4"

NC8

305

0"

30.0

x6B-

EN

C830

61

3/4"

NC8

307

1 1/

4"

38.0

x6B-

E

NC8

306

2 1/

4"

NC8

307

1 1/

4"

NC8

309

1 1/

2"

38.0

x7B-

EN

C830

91

3/8"

5V38

.0x6

-EN

C830

75/

8"

NC8

309

3/4"

Shea

ve A

ssem

bly

Torq

ue R

equi

rem

ents

Bus

hing

Typ

eB

olt

Size

Alu

min

-um

Cas

tIr

onTo

rque

(ft

. lbs

.)SF

3/8"

x 2

"22

30

E1/

2" x

2 3

/4"

3560

F9/

16"

6511

0

NC8

301

thru

NC8

312

SHO

P AS

SEM

BLY

00-1

286B

PAG

E 7

-37

BEL

T D

RIV

E A

SSEM

BLY

Step

Tw

o D

etai

ls M

otor

She

ave

Iden

tify

mot

or s

heav

e M

24 b

ushi

ng M

25 b

eing

use

d an

d ob

tain

inst

alla

tion

dim

ensi

on "B

" fro

m c

hart

on th

e ne

xt p

age.

The

mot

or s

heav

e is

alw

ays

the

smal

ler o

f the

two

driv

e sh

eave

s an

d m

ay h

ave

2 to

7 g

roov

es.

Thor

ough

ly c

lean

the

exte

rior o

f the

bus

hing

and

the

tape

red

bore

of t

he s

heav

e. N

icks

, bur

rs, d

irt, a

nd c

hips

sho

uld

be re

mov

ed, s

ince

they

can

caus

e a

loss

of c

once

ntric

ity a

nd e

ven

grip

ping

stre

ngth

. D

o no

t use

oil,

gre

ase,

or a

ntis

ieze

com

poun

ds o

n bu

shin

g su

rfac

es, s

heav

e bo

re o

rsh

aft.

Che

ck k

ey s

ize

with

bot

h sh

aft a

nd b

ushi

ng k

eyw

ay.

Mot

or s

heav

es w

ill be

"rev

erse

mou

nted

" on

the

bush

ing

(fast

ener

s th

read

ed in

to b

ushi

ng) a

s sh

own

on p

age

7-42

, unl

ess

indi

cate

d ot

herw

ise

in th

eta

ble

on n

ext p

age.

She

aves

requ

iring

"sta

ndar

d m

ount

ing"

(fas

tene

rs th

read

ed in

to s

heav

e) w

ith b

ushi

ng h

ub to

war

ds e

nd o

f sha

ft ar

e sh

own

on p

age

7-43

. If th

e m

otor

she

ave

bein

g us

ed is

not

list

ed in

the

tabl

e on

this

pag

e, in

stal

l as

clos

e to

the

mot

or fa

ce a

s po

ssib

le (l

eavi

ng a

ppro

xim

atel

y 1/

4"cl

eara

nce)

and

adj

ust f

an s

heav

e to

alig

n.

NC8

301

thru

NC8

312

SHO

P AS

SEM

BLY

00-1

286B

PAG

E 7

-39

M25

Mot

or b

ushi

ng

M24

Mot

orsh

eave

Mot

or sh

aft

Out

of b

ushi

ng

End

of m

otor

shaf

t

B

Bush

ing

set s

crew

Bush

ing

hard

war

e(in

clud

ed w

ith b

ushi

ng)

BEL

T D

RIV

E A

SSEM

BLY

Step

Tw

o M

otor

She

ave

"Rev

erse

Mou

nted

" M

otor

She

ave

Slid

e th

e bu

shin

g M

25 o

nto

the

shaf

t (w

ith b

ushi

ng h

ub a

way

from

end

of

shaf

t) at

dim

ensi

on g

iven

in th

e ta

ble

on p

age

7-41

and

tigh

ten

set s

crew

. D

ono

t for

ce b

ushi

ng o

nto

the

shaf

t. If

it d

oes

not g

o on

eas

ily, c

heck

the

shaf

t,bu

shin

g, a

nd k

ey s

izes

. D

o no

t spr

ead

bush

ing!

Inse

rt sh

eave

M24

loos

ely

over

bus

hing

with

the

unth

read

ed h

ole

of th

esh

eave

mat

ched

with

the

bus

hing

's t

hrea

ded

hole

s.

Do

not

pres

s or

driv

e.D

eter

min

e ca

pscr

ew s

ize

requ

ired

base

d on

bus

hing

type

bei

ng u

sed.

Th

eca

pscr

ews

shou

ld b

e in

serte

d th

roug

h th

e sh

eave

and

thre

aded

by

hand

into

the

bush

ing.

Tig

hten

the

caps

crew

s pr

ogre

ssiv

ely

with

a to

rque

wre

nch.

Tig

hten

caps

crew

s us

ing

quar

ter

to h

alf t

urns

at a

tim

e, m

ovin

g ar

ound

the

bush

ing

flang

e in

the

sam

e di

rect

ion

until

the

desi

red

torq

ue is

reac

hed.

Set

the

torq

ueva

lue

usin

g th

e gu

ide

in th

e ch

art b

elow

. Th

e to

rque

sho

uld

not e

xcee

d th

eva

lues

sho

wn.

D

o no

t atte

mpt

to p

ull t

he b

ushi

ng fl

ange

flus

h w

ith th

e sh

eave

surfa

ce.

Ther

e sh

ould

be

a cl

eara

nce

gap

whe

n tig

hten

ed to

spe

cifie

d to

rque

.

Figu

re 7

-42

Shea

ve A

ssem

bly

Torq

ue R

equi

rem

ents

Bush

ing

Type

Bolt

Size

Alu

min

umC

ast I

ron

Torq

ue (f

t. lb

s.)

SH1/

4"x1

3/8

"6

9

SD1/

4"x2

1/4

"6

9

SF3/

8"x2

1/2

"22

30

SK5/

16"x

2 1/

2"13

15

E1/

2"x3

1/4

"35

60

NC8

301

thru

NC8

312

SHO

P AS

SEM

BLY

00-1

286B

PAG

E 7

-40

BELT

AN

D S

HEA

VE

INST

ALL

ATIO

N"S

tand

ard

Mou

nted

" M

otor

She

ave

with

Hub

Tow

ards

End

of S

haft

Plac

e sh

eave

M24

ove

r mot

or s

haft

(with

thre

aded

hol

es fa

cing

end

of

shaf

t) an

d ho

ld in

pla

ce w

hile

slid

ing

the

bush

ing

M25

ont

o th

e sh

aft (

with

bush

ing

hub

tow

ards

end

of s

haft)

at d

imen

sion

giv

en in

the

tabl

e on

pag

e 7-

41 an

d tig

hten

set s

crew

. D

o no

t for

ce b

ushi

ng o

nto

the s

haft.

If i

t doe

s not

go

on e

asily

, che

ck th

e sh

aft,

bush

ing,

and

key

size

s. D

o no

t spr

ead

bush

ing!

Slid

e sh

eave

dow

n lo

osel

y ov

er b

ushi

ng w

ith th

e th

read

ed h

oles

of t

hesh

eave

mat

ched

with

the

unth

read

ed h

oles

on

the

bush

ing.

Do

not p

ress

or

driv

e. I

nser

t the

cap

scre

ws t

hrou

gh th

e bu

shin

g an

d th

read

, by

hand

, int

o th

esh

eave

. T

ight

en th

e ca

pscr

ews p

rogr

essi

vely

with

a to

rque

wre

nch.

Tig

hten

caps

crew

s us

ing

quar

ter t

o ha

lf tu

rns

at a

tim

e, m

ovin

g ar

ound

the

bush

ing

flang

e in

the s

ame d

irect

ion

until

the d

esire

d to

rque

is re

ache

d. S

et th

e tor

que

valu

e us

ing

the

guid

e in

the

char

t bel

ow.

The

torq

ue s

houl

d no

t exc

eed

the

valu

es sh

own.

Do

not a

ttem

pt to

pul

l the

bus

hing

flan

ge fl

ush

with

the s

heav

esu

rfac

e. T

here

shou

ld b

e a

clea

ranc

e ga

p w

hen

tight

ened

to sp

ecifi

ed to

rque

.

M25

Mot

orbu

shin

g

M24

Mot

orsh

eave

Out

of b

ushi

ng

End

ofm

otor

shaf

t

B

Bush

ing

set s

crew

Bush

ing

hard

war

e(in

clud

ed w

ith b

ushi

ng)

Figu

re 7

-43

Shea

ve A

ssem

bly

Torq

ue R

equi

rem

ents

Bush

ing

Type

Bolt

Size

Alu

min

umC

ast I

ron

Torq

ue (f

t. lb

s.)

SH1/

4"x1

3/8

"6

9

SD1/

4"x2

1/4

"6

9

SF3/

8"x2

1/2

"22

30

SK5/

16"x

2 1/

2"13

15

E1/

2"x3

1/4

"35

60

NC8

301

thru

NC8

312

SHO

P AS

SEM

BLY

00-1

286B

PAG

E 7

-41

Line

of s

ight

BELT

AN

D S

HEA

VE

INST

ALL

ATIO

NSt

ep T

hree

(NC8

304-

NC8

309)

Verif

y th

at fa

n sh

eave

is le

vel.

If re

quire

d, a

djus

t fan

shaf

t bea

ring

loca

tion

or sh

im u

nder

bea

rings

with

Y56

. Fa

n sh

eave

may

var

yfr

om le

vel b

y a

max

imum

of 0

.3 d

egre

es.

If a

djus

tmen

ts a

re m

ade,

rech

eck

fan

tilt a

nd tr

ack

and

reto

rque

bol

ts.

The

fan

and

mot

or sh

eave

s sho

uld

be e

ven

thro

ugh

a di

rect

line

of s

ight

acr

oss t

he b

otto

m o

f the

shea

ves.

A st

raig

ht e

dge

or st

ring

may

be

used

to v

erify

shea

ve a

lignm

ent.

The

strin

g sh

ould

hav

e co

ntac

t at t

he fo

ur p

oint

s ind

icat

ed w

hen

layi

ng fl

at a

cros

s bot

tom

of

shea

ves w

ithou

t bei

ng d

efle

cted

. Th

e bo

ttom

of t

he m

otor

and

fan

shea

ves m

ust b

e w

ithin

1/8

" of e

ach

othe

r. A

djus

t fan

shea

ve lo

catio

nas

requ

ired

to o

btai

n al

ignm

ent.

Adju

st fa

n sh

eave

up o

r dow

n to

achi

eve

alig

nmen

t.

NC8

301

thru

NC8

312

SHO

P AS

SEM

BLY

00-1

286B

PAG

E 7

-42

Use

thes

e nu

ts to

secu

re m

otor

supp

ort i

n po

sitio

n af

ter a

djus

ting

belt

tens

ion.

Adju

st b

elt t

ensi

on b

ytu

rnin

g th

read

ed ro

d he

re.

Not

e: O

n sta

inle

ss st

eel

towe

rs, a

pply

ant

i-sei

zeco

mpo

und

to th

read

sbe

fore

turn

ing.

BELT

AN

D S

HEA

VE

INST

ALL

ATIO

NSt

ep F

our (

NC8

304-

8309

)In

stal

l V-B

elt o

n sh

eave

s and

use

thre

aded

rod

to a

djus

t bel

t ten

sion

. Th

e nu

mbe

r of g

roov

eson

the

mot

or a

nd fa

n sh

eave

s and

the

num

ber o

fri

bs o

n th

e be

lt m

ay v

ary.

Alw

ays i

nsta

ll be

lt on

the

high

est g

roov

es o

f the

shea

ves.

Whe

n be

lt is

at d

esire

d te

nsio

n, ti

ghte

n do

uble

nut

on

thre

aded

rod

to re

tain

in p

ositi

on.

Gen

eral

Rul

es o

f Bel

t Ten

sioni

ng•

Idea

l ten

sion

is th

e lo

wes

t ten

sion

at w

hich

the

belt

will

not

slip

und

er p

eak

load

con

di-

tions

. •O

ver t

ensi

onin

g sh

orte

ns b

elt a

nd b

earin

g lif

e.•

Kee

p be

lts fr

ee fr

om fo

reig

n m

ater

ial w

hich

may

cau

se sl

ip.

•N

ever

app

ly b

elt d

ress

ing,

as t

his w

ill d

amag

e th

e be

lt an

d ca

use

early

failu

re.

Belt

A

DE

TAIL

A