OSCILLATING TURRET(U) UNCLASSIFIED EU MR ...D-RI23 .373 AUTOMATIC OSCILLATING TURRET(U) FEECON CORP WESTBOROUGH I/I. MR J GAGL IARDO ET AL. MAR 81 ESL-TR-88-64 FY-8952-79-6888P EEEEEE

D-RI23 .373 AUTOMATIC OSCILLATING TURRET(U) FEECON CORP WESTBOROUGH I/I.MR J GAGL IARDO ET AL. MAR 81 ESL-TR-88-64FY-8952-79-6888P

UNCLASSIFIED F/G 13/12 NEU mEEEEEAhiEEEEEE h hEmhEEohhEmhohEhmhEEEEEEmhEIsmhEEEEEEEshE*lflflflflmos

-44

~ 1.0.81111= A

MIRCOYREOUTINTS HRNATIOAL BREAU OF STNDRS96-

-7H..

AUTOMATIC OSCILLATING TURRET____

0 .0

MR. JOHN SAGUAROS, MR. JAMES SHEBAN,MR. JOSEPH L WALKER. CAPT ANTHONY KWAN

FEECON CORPORATIONONE WALKUP DRIVEWESTBORO, MA 01561

MARCH 1961

FINAL REPORTFEBRUARY 1978- SEPTEMBER 196

ELECTK

JAN 11983jE-

APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED

ENGINEERING AND SERVICES LABORATORYAIR FORCE ENGINEERING AND SERVICES CENTERTYNDALL AIR FORCE BASE, FLORIDA 32403

83 01 13 030,

NOTICE

R.EASE DO NOT REQUEST COPIES OF THIS REPORT FROM

IIQ AFESU/RD (ENGINEERING AND SERVICES LABORATORY),

ADDITONAL COPIES MAY BE PURCHASED FROM:

NATIONAL TECHNICAL INFOFMTION SERVICE

5285 FORT ROYAL ItAD

SPRINGFIELD, VIRGINIA 22161

FEDERAL GOVERiENT AGENCIES AND THEIR CONTRACTORS

REGISTERED WITH DEFENSE TECHNICAL INFORMATION CENTER

SHOULD DIRECT REQUESTS FOR COPIES OF THIS REPORT TO:

DEFENSE TECHNICAL INFORMATION CENTER

C STATION

AmLEXANDRIA, VIRGINIA 22314

;b-

VTTk~TWT'PTSECURITY CLASSIFICATION OF THIS PAGE (Whien Data Ent ered),

READ INSTRUCTIONSREPOT DCUMNTATON AGEBEFORE COMPLETING FORM

1REPORT NUMBER 2.GOVT ACCESSION NO. 3. RECIPIENT'S CATALOG NUMBER

ESL-TR-80-64 -4/23 37 _____________

4. TITLE (and Subtitle) S. TYPE OF REPORT & PERIOD COVERED

Final Report: February 1978ZAUTOMATIC OSCILLATING TURRET SYSTEM September 1980

* 6. PERFORMING 01G. REPORT NUMBER

.J7. AUTHOR(S) S. CONTRACT OR GRANT NUMBER(s)

Mr. John Gagliardo Anthony J. Kwan AFESC Project order No.Mr. James O'Regan FY 8952-79-60009Mr. Joseph Walker

9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. PROGRAM ELEMENT. PROJECT, TASKAREA 6 WORK UNIT NUMBERS

FEECN CoporaionJON: 2505-1009One Wlkup riveProgram Element 64708F

It. CONTROLLING OFFICE NAME AND ADDRESS 12. REPORT DATE

March 198113. NUMBER OFPAGES

6314. MONITORING AGENCY NAME & ADDRESS(II different from Controlling Office) IS. SECURITY CLASS. (of this report)

UNCLASSIFIED

ISa. DECL ASSI FIC ATI ON/ DOWNGRADINGSCHEDULE

IS. DISTRIBUTION STATEMENT (of this Report)

Approved for public release; distribution unlimited.

17. DISTRIBUTION STATEMENT (of the abstract entered In Block 20, If different from Report)

IS. SUPPLEMENTARY NOTES

Availability of this report is specified on reverse. of front cover.

19. KEY WORDS (Continue on reverse side if necessary and identify by block numnber)

Fire suppressionFire extinguishing agentsFire fightingNozzlesFire fiahtinci vehicles

* 20. ABSTRACT (Continue an reverse side It necessary end Identify by block numnber)

?The objective of this project was to provide a more effective fire fightingcapability by the driver/operator of the AS 32/P-4 An AS 32/P-4arrfcrash rescue vehicle was reconfigured vith a 300 gallon per minute (gpm)automatic, non-air-aspirating, bumper turret. This turret was evaluate-d as areplacement unit for the existing manually operated 300 gpm bumper turret.Twelve operational tests were conducted to determine the best oscillating rateand the agent discharge patterns. All tests used 6 percent Aqueous Film

Wsw~vm Wnwmt~WU'~am ~h.v4InriimiWaffant. Three live-fire tests wereN,.

D FORA 17 EDITION OF I NOV 65 It OBSOLETE UNLASIID Lf

SECURITY CLASSIFICATION OF THIS PAGE (When Dot* Entere0

SECURtITY CLASSIFICATION OF TIS PA49(Vwa Does Kaheed)

*conducted for comparative turret and nozzle effectiveness on large scale firesThe automatic, non-air aspirating, oscillating turret was shown to have twicethe effective discharge range, and achieved fire extinguishment 30 percentfaster then the existing turret.

UNCLASSIFIEDSetolIv fLASSgpgCATIOO OF Tut PAf%'rW% Data ffftPd1

...................... .l....... . .............

PREFACE

This report was prepared by the FEECON Corporation, One WalkupDrive, Westboro, MA 01581; and the Air Force Engineering andServices Center, Air Force Engineering and Services Laboratory(RDCS) Tyndall AFB, Florida, 32403, under contract numberFY 8952-79-6009 and Jcb 2505-1009.

This report summarizes work done between February 1978 andSeptember 1980. The Project Officer was Mr. Joseph L. Walker.

Appreciation is expressed to Mr. James O'Regan and Mr. JohnGagliardo, FEECON Corp., for their assistance and technicalsupport. The excellent cooperation and assistance provided bythe members of the Eglin Air Force Base, Florida, Fire Departmentunder Fire Chief Bob Barrows is gratefully acknowledged.

This report has been reviewed by the Office of Public Affairs(PA) and is releasable to the National Technical InformationService (NTIS). At NTIS it will be available to the generalpublic, including foreign nations.

This technical report has been reviewed and is approved forpublication.

SEP ALKER E . GOIN, Lt Col, USAFroject Officer Chief, Engineering ResearchDivision

Accession For

DTIC TAB FRANCIS B. CROWLEY 1,. 1, USAFUnannounced 0 Director, Engineering R earchJustification Laboratory

BY* - Distribution/

Availability CodesAvail and/or

Dist Special

(The reverse of this page is blank.)

.* . *. . . .44 4 4 4 ' . -4. . . . - - - . - 4.-...-. . . . 4.. ~44~*~**~ 4'..... - . -. 4.--. . . - 4' 4- -. 4 -- 4 4- -- 4 4-- 4 - 4'

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TABLE OF CONTENTS

Section Title Page

I. INTRODUCTION

1. Objective ...................................... 12. Background ..................................... I

3. Approach ....................................... 1

II. TEST DESCRIPTION ...................................2

III. TEST CRITERIA ...................................... 3

IV. TEST RESULTS ...................................... 4

~VI. CONCLUSIONS ..................... . . . . . . ...... 22

VII. RECOMMENDATIONS .................................... 23

-BIBLIOGRAPHY ................... ... ........ o....e.... *24

APPENDIX P-4 OSCILLATING BUMPER TURRET ...................... 25

A. DESCRIPTION

1. Turret Controls ................................. 262. Turret Elevation ................................. 263. Turret Hydraulic System ................. ..... 274. Turret Rotation .............................. 275. Shutoff Valve Assembly ........... o ............ . .286. Pattern Control ........................... o...... 287. Removal of Shroud and Existing P-4 Bumper

Turret ...... ............ . . . . . ........... 29

B. TURRET INSTALLATION

1. Oscillating Bumper Turret Disassembly ............. 302. Roof Turret Modification ... . ...... . ............. . 313. Rewiring Relay for Turret Hydraulic Relief

Valve . . o......... .. .. ... ..... . .... ....... 33

C. OPERATING PROCEDURES

1. Automatic Oscillation... ..... ............... 342. Manual Operation. ............................... 35

2 Manal Oeratoni3

TABLE OF CONTENTS (CONTINUED)

Section Title Page

D. MAINTENANCE

1. Preventative M~ai ntenance ............ .. ............ 362. Elevation Adjustment ....... ... .. . ... .. . ....... .... .363. Rotation Adjustment ....... .. . . ... o . . . .. .. ... 364. Pattern Control Adjustment...... . . . .... .. . . 375o Turret Head Removal ........ ...... .... .......... ::386. Turret Head Reassembly... o ................ .... 397. Turret Body Removal ... .. o.... o ... .. ooo..... 398o Turret Base Reassembly ... ........ .- ........... o40

-. 9o Turret Base Removal... ... o.. oo.o. . . ..... ... .. o..40

10o Tu~rret Base Reassembly.. .... o. .. .o .. .. .. . .. . . .. ..4111. Foam Tube Assembly Removal ........................4112. Foam Tube Reassembly ........ ... . .... .. . ...... .. ... .42

* ~E. TROUBLESHOOTING .......................... 4

F. BUMPER TURRET ASSEMBLY DRAWINGS ................ oo...*44

G. BILL OF MATERIAL ................... **.. ......... 57

LIST OF FIGURES

Figure Title Page

A-1 Control Mechanism ..................................... 45

A -2 Bumper Turret Storage 46...........46

• A-3 Feed Line Assemble .................................... 47

A-4 Bumper/Roof Turret Kit Conversion ..................... 48

A-5 Bumper Turret Wiring Diagram .......................... 49

A-6 Bumper Turret Assembly, Hydraulic ..................... 50

'A-7 Bumper Turret ......................................... 51

A-8 Turn-On Valve Assembly, Hydraulic ..................... 52

A-9 Solenoid Valve Assembly ............................... 53

A-10 Decontrol Valve ....................................... 54

A-11 Decontrol Valve Assembly ............................... 55

A-12 Nozzle Assembly, Air-Aspirating ....................... 56

V

LIST OF TABLES

Table Title Page

1. Water Discharge Straight Steam, Bumper Turret Only,220 psi Turret Pressure ................................ 5

2. Water Discharge Straight Steam, Bumper Turret and OneRoof Turret Water Tube, 200 psi Turret Pressure ........ 5

3. Water Discharge Straight Steam, Bumper Turret and TwoRoof Turret Water Tubes, 165 psi Turret Pressure ....... 6

4. Water Discharge Disperse Pattern, Bumper Turret Only,220 psi Turret Pressure ................................ 6

5. Water Discharge Disperse Pattern, Bumper Turret and OneRoof Turret Water Tube, 200 psi Turret Pressure ........ 7

6. Water Discharge Disperse Pattern, Bumper Turret and TwoRoof Turret Water Tubes, 165 psi Turret Pressure ....... 7

7. Foam Discharge Straight Stream, Bumper Turret Only, 220psi Turret Pressure ......... ................... 8

8. Foam Discharge Straight Steam, Bumper Turret and OneRoof Turret Foam Tube, 200 psi Turret Pressure ......... 8

9. Foam Discharge Straight Stream, Bumper Turret and TwoRoof Turret Foam Tubes, 165 psi Turret Pressure ........ 9

10. Foam Discharge Disperse Pattern, Bumper Turret Only,psi Turret Pressure .................................... 9

11. Foam Discharge Disperse Pattern, Bumper Turret and OneRoof Turret Foam Tube, 200 psi Turret Pressure..; ...... 10

12. Foam Discharge Disperse Pattern, Bumper Turret and TwoRoof Turret Foam Tubes, 165 psi Turret Pressure ........ 10

13. Discharge Capacity Calculaton ......................... 11

14. Foam Quality Test Results .............................. 12

15. Foam Expansion Test Results of Bumper Turret Only,Straight Stream Pattern ................................ 13

16. Foam Expansion Test Results of Bumper Turret and OneRoof Turret Foam Tube, Straight Stream Pattern ......... 14

vi

.

LIST OF TABLES (CONTINUED)

Table Title Page

17. Foam Expansion Test Results of Bumper Turret and TwoRoof Turret Foam Tubes, Straight Stream Pattern......... 15

18. Foam Expansion Test Results of Bumper Turret Only,Dispersed Pattern............................. .. .. 16

19. Foam Expansion Test Results of Bumper Turret and oneTurret Foam Tubes, Dispersed Pattern.................... 17

20. Foam Expansion Test Results of Bumper Turret and 71.Roof Turret Foam Tubes, Dispersed Pattern......... .... 19

21. Live Fire Test Results....................... 20

vii(The reverse of this page is blank)

SECTION I

INTRODUCTION1. Objective

The objective of this j roject was to develop a more efficientmethod of applying AqueousW Film Forming Foam (AFFF) from crashrescue vehicle bumper turrets.

2. Background

The AS 32/P-4 aircraft crash rescue vehicle, (henceforthcalled P-4 vehicle) used on most Air Force installations, wasdesigned to be manned by three persons, including the driver. TheP-4 bumper turret control system is awkward to operate and ingeneral, applies AFFF ineffectively. Advanced technology makes itpossible to develop a firefighting system superior to the one ori-ginally installed in the P-4 vehicle.

3. Approach

A statement of work for an Oscillating Turret System on a P-4vehicle was prepared for the design and testing of an automaticoscillating bumper turret (henceforth called bumper turret). Oneof the requirements was that the P-4 vehicle's driver be able tooperate the bumper turret with the vehicle in motion. A P-4vehicle from Eglin Air Force Base, Florida, was sent to the FEECONCorp., 1 Walkup Drive, Westboro, Maine, fo, the purpose of havin?a new bumper turret installed and field-tested at the contractor slocation. This was to be done in accordance with the statement ofwork and the National Fire Protection Association (NFPA) Pamphlet412, using an air-aspirating nozzle.

In November 1979, four live fire tests were conducted atEglin AFB, Florida, using only the bumoer turret foragent application; a non-air-aspirating nozzle was used todemonstrate the longer reach and faster fire control time of thistype nozzle. Three fires were used to determine the firesuppression capability of the bumper turret. A fourth fire wasconducted to compare the fire suppression capability of the newbumper turret with the bumper turret 'riginally installed on P-4vehicles; for this test only, another P-4 vehicle, with the origi-nal bumper turret installed, was used.

11

SECTION II

TEST DESCRIPTION

Turret ground pattern tests were conducted to determine themaximum stream reach, width, and application. These tests wereaccomplished using only the bumper turret; and using the bumperturret simultaneously with both one and two roof foam/water _tubes.

A water discharge capacity test was conducted to determine thegallons per minute (gpm)_available from the bumper turret. Waterwas discharged from the bumper turret for 3 minutes from afull water tank and then refilled from a calibrated tank, in orderto measure the amount used.

Foam quality tests were taken during the foam pattern tests.They consisted of finding the expansion ratio and drainage time ofthe AFFF. A standard expansion ratio of five is established in theNFPA pamphlet No. 414, and a minimum drainage time of 4.5 minuteswas established, by the statement of work for the bumper turret.

The pattern tests (agent system foam discharge, and agentwater system discharge) were conducted by discharging the bumperturret along a measured grid for a certain length of time, 30

seconds for all foam tests, and I- minute for all water tests.The grid consisted of several 11-inch diameter pans at premeasured.points. The amount of discharge collected in each pan during therun was measured to determine the coverage per square foot. Theeffective pattern was determined to be the area in which theapplication rate was at least .2 gpm.

The road tests (rough terrain) were conducted in an open fieldnear the contractor's plant. The P-4 vehicle was driven 30 times

over a 0.2-mile course at 10 mph to determine whether the newbumper turret would leave its stowed position when subjected tothe bumps and vibrations of the P-4 vehicle.

2

SECTION III

TEST CRITERIA

The oscillating bumper turret consists of a hydraulicallyoperated air-aspirating turret mounted on the front of an AS 32/P-4 fire vehicle. It was designed to be powered by the P-4 firetruck's original hydraulic and electrical systems. Other criteriarequirements were:

1. Turret controls inside cab.

2. Automatic oscillation with fixed elevation to range from20* below the horizontal to 450 above the horizon.

3. Oscillation and direction of oscillation to vary throughany arc up to 1700 in front of the vehicle, and the speed ofoscillation to be regulated from 00 per second to 60* per second.

4. That AFFF solution (94-percent H20 and 6-percent AFFF) or---plain water can be discharged.

5. That manual override controls be installed to operate theo, turret during hydraulic or electrical system failure.

The live fire tests were presoaked with 1000 gallons of waterprior to the first test. Four hundred gallons of fuel were usedfor each of the four tests. The fuel was spilled in a 110-footdiameter burn area around a 60-foot boiler plate mock-up. Firesuppression was limited to the bumper turret. The preburn timewas from 30 to 35 seconds. Refractometer tests were conductedafter each test fire to insure a true 6-percent--AFMF solutfoi.

The results of all tests conducted are contained in thisreport.

3

SECTION IV

TEST RESULTS

On 6 June 1979, 12 operational tests (no fires) were con-ducted at the contractor's location. The purpose of these testswas to evaluate the automatic, oscillating, bumper turret'sdischarge patterns, maximum stream ranges and widths. First,tests were conducted using plain water, and then a mixture of 6-percent AFFF and 94-percent water. Test procedures consisted ofdischarging the bumper turret along a measured grid. Water pat-terns were first checked and then AFFF patterns were evaluated.The grid used for this test consisted of several 11-inch pansplaced at 1remeasured points. The amount of agent collected ineach pan was measured immediately after agent discharge wasstopped. The effective pattern was determined to be the area thathad at least 0.2 gallon of agent in the pans. National FireProtection Association (NFPA) Pamphlet Number 412 and the state-ment of work were used as source documents for these tests (seeTables 1 through 12 for test results). The author and a represen-tative from AFESC/DEF monitored these tests.

A water discharge capacity test was conducted to determine themax gPmS available from the self-oscillating turret. The watertank on the P-4 fire truck was filled and water was dischargedfrom the bumper turret for 3 minutes. The water tank was then_refilled from a 1900 gallon calibrated water tank to determine thegallons used in 3 minutes (see Tables 13 througn 20 for testresults).

The road test (rough terrain) was conducted in an open fieldnear the contractor's plant. The truck was driven 30 times over a0.2-mlle course at 10 mph. The operator removed the turret fromthe stowed position and discharged it a total of ten times duringthis test. The turret was operated in both the manual and auto-matic positions. The driver demonstrated an ability to drive thevehicle and simultaneously operate the bumper turret in the auto-matic position. The turret did not inavertently leave its stowedposition when returned to that position after use, even though theterrain was rougher than that normally encountered off the runwayon an air force base.

Three live fire tests were conducted at Eglin AFB, Florida,after the P-4, which had been modified to include the automaticself-oscillating bumper turret, was returned from the contractor.A non-air-aspirating bumper turret provided by the contractor wasused during all three of these tests. The ambient temperature

" varied from 550F to 68*F and the water temperature from 70*F to78°F. Windspeeds of 4-5 knots from a northeasterly direction pre-vailed throughout these tests. The excellent fire control timesobtained during the test fires can be attributed partially to theuse of the non-air-aspirating nozzle; i.e., non-air-aspirating

4

-- . -..

nozzles provide longer reach streams and fire control isaccomplished in approximately 50 percent of the time required foran air-aspirated turret nozzle. Conducted burn back resistancetime tests compared resonably to the test results previouslyestablished in CEEDO-TR-78-22, '!Comparative Nozzle Study forApplying AqueousO Film Forming Foam on large scale fires"; i.e.,burn-back resistance of both types (air-aspirated andnon-air-aspirated) of AFFF were considered relatively equal for

* the test conditions used. Fire control and extinguishment of.: these fires were accomplished using only the automatic self-

oscillating bumper turret. An upwind approach was used on allfires. The turret operator used a straight stream on the initialapproach changing to an intermediate or full fog pattern.Progressive extinguishment (a visible reduction in the magnitudeof the fire) was obtained in 4 seconds on each fire. A delay infire control time (gO-percent extinguishment) was noted during the

.- second test fire due to the turret operator changing to a full fogstream instead of the intermediate fog stream. Maximum ranges of

*130 feet for straight stream, 51 feet for intermediate fog and 30feet for full fog were obtained during these fires. After these

*. tests were completed another fire was conducted to compare thefire suppression capability of the self-oscillating bumper turret

" with the originally installed bumper turret on the P-4 fire truck.Progressive extinguishment remained the same (4 seconds); however,time to obtain fire control was delayed considerably. The sa'ie. .basic techniques used in test fires One and Three were used in thisfire. This delay was undoubtedly caused by the turret operator'sinability to apply firefighting agent to the fire areas as well asthe automatic turret feature (see Table 21 for test results). Theauthor and a representative of AFESC/DEF monotored these tests.

5

TABLE 1. WATER DISCHARGE STRAIGHT STREAM BUMPERTURRET ONLY, 220 PSI TURRET PRESSURE

Maximum Range - 157'Maximum Width - 12 Range Width

Pattern 1 Feet j I Feet I

150 8

40 12

30 12

-_ - - 20 12

110 11

100 8

90 5

80 4

70 2

TABLE 2. WATER DISCHARGE STRAIGHT STREAM BUMPER TURRET AND ONEROOF. TURRET. WATER TUBE, 200 PSI TURRET PRESSURE

Maximum Range - 154'Maximum Width - 11

Range WidthPattern I Feet I I Feet I

150 6

140 8

130 11

* -120 11

110 11

100 10

90 9

80 7

70 4

6

TABLE 3. WATER DISCHARGE STRAIGHT STREAM BUMPER TURRET AND TWOROOF TURRET WATER TUBES, 165 PSI TURRET PRESSURE

Maximum Range - 151Maximum Width - 101

Pattern I Feet I I Feet I150 3

- 140 8

- --- 130 9

- - 120 10

- - - 110 10

- 100 11

---- 90 9

80 8

70 2

TABLE 4. WATER DISCHARGE-DISPERSE PATTERN BUMPER TURRET ONLY,220 PSI TURRET PRESSURE

Maximum Range - 74'Minimum Range - 17'Maximum Width - 26'

Range WidthPattern Feetl IFeet I

70 1560 26

50 24

40 14

30 10

20 4

7

TABLE 5. WATER DISCHARGE DISPERSE PATTERN BUMPER TURRET AND ONE.ROOF__TIRRET WATER TUBE, 200 PSI TURRET PRESSURE

Maximum Range - 69'Minimum Range -- 15

Maximum Width - 28'

Patter Range WidthIFeeti Feeti60 2750 26

40 19

30 14

20 6

TABLE 6. WATER DISCHARGE DISPERSE PATTERN BUMPER TURRET AND TWO-. ROOF TURRET WATER TUBES, 165 PSI TURRET PRESSURE

Maximum Range - 66Minimum Range - 171Maximum Width - 27

Range Width

Pattern IFeetI IFeetI

60 15

50 25

40 26

30 15

20 5

8

TABLE 7. FOAM DISCHARGE STRAIGHT STREAM BUMPER TURRET ONLY, 220PSI TURRET PRESSURE

Maxkn Range - 136'Maxbmn Width -

pattern F I Feet IF.

A130 7

120 10

110 12

100 14

90 1480 13

70 11

60 8

50 3

TABLE 8. FOAM DISCHARGE STRAIGHT STREAM BUMPER TURRET AND ONEROOF TURRET FOAM TUBE, 200 PSI TURRET PRESSURE

Maxhkuam Range - 134Maxhmmn Width - 13' Range Width

Pattern (Feetl I Feet I130 8

1120 13110 13

100 13

90 12

s0 10708

s0 6

50 2

TABLE 9. FOAM DISCHARGE STRAIGHT STREAM BUMPER TURRET AND TWOROOF TURRET FOAM TUBES, 165 PSI TURRET PRESSURE

Maximum Range - 135Maximum Width - 12' Range Width

Pattern IFeet| IFeeti--- 130 7

- 120 11

- 110 11

- 100 12

- 90 10

- 80 10

70 10""F --- 60 7

50 4

TABLE 10. FOAM DISCHARGE DISPERSE PATTERN BUMPER TURRET ONLY,220 PSI TURRET PRESSURE

Maxinum Range - 64Minknum Range - 12'Maximum Width - 43'

Range WidthPattern I Feet I IFeetl

60 20

50 40

40 44

30 40

20 21

10

TABLE 11. FOAM DISCHARGE DISPERSE PATTERN TURRET AND ONE ROOF

TURRET FOAM TUBE, 200 PSI TURRET PRESSURE

Maximum Range -82

Minimum Range - 13'Maximum Width - 40'

Range WidthPattern (Feet IIFe

60 1550 s 39

40 38

30 33

20 18

TABLE 12. FOAM DISCHARGE DISPERSE PATTERN BUMPER TURRET AND TWO

ROOF TURRET FOAM TUBES, 165 PSI TURRET PRESSURE

Maximum Range - 633MJiimum Range - 8'1

Msxhwium Width -40' Range Range

Pattern I Feetl 1Feet I

60 22

50 35

40 38

30 28

20 17

10 7

•7 Z . : .,. ,- . ... .' .. ..... ... ..

TABLE 13. DISCHARGE CAPACITY CALCULATION

Discharge Capacity

1900 Gallon Tank Calibrations

Tank Diameter = 72 Inches

Gallons/Feet -Area x Hei ht (In Inches)231 Cubic Inches/Gal ons

- (72")2 x 12" = 211.5 Gallons/Feet

231 Cubic Inches/Gallon

Gallons of Water Available in the 1900 Gallon Tank

Water Level Dropped 4.9

4.9 x 211.5 = 1,035 Gallons

Discharge Time = 3.0 Minutes

Discharge Rate = 1,036 Gallons

3.0 Minutes

- 345 Gpm

12

. . :: -. . : .! . :' ': '. L "i. . -.. . . . . . . . . . . .

TABLE 14. FOAM QUALITY TEST RESULTS

Expansion Standard Minimum of 5.0

Expansion Minimums Derived From Tests:

Bumper Turret Only 7.0

Bumper Turret and One Roof Turret Foam Tube 7.3

Bumpter Turret and Two Roof Turret Foam Tubes 6.5

25% Drainage Time Standard (Minimum) 4.5 Minutes

25% Drainage Time Derived From Test Results

(Minimum)

Bumper Turret Only 5.7 Minutes

Bumper Turret and One Roof Turret Foam Tube 5.7 Minutes

Bumper Turret and Two Roof Turret Foam Tubes 5.3 Minutes

13

TABLE 15. FOAM EXPANSION TEST RESULTS OF BUMPER TURRET ONLY,STRAIGHT STREAM PATTERN

Volume of Foam Sampling Cylinder 1000 Milliliters

Weight of Foam Sample and Cylinder 388 Grams

Weight of Cylinder 266 Grams

Weight of Foam Sample = 388 Grams - 266 Grams = 122 Grams

Weight of Foam Solution if it Filled the Pan 1000 Grams

Expansion = 1000 grams/122 grams 8.2

14

... . ..4 ' . -, .: . - • ., -.. , , _o . ..

TABLE 16. FOAM EXPANSION TEST RESULTS OF BUMPER TURRET AND ONE

ROOF TURRET FOAM TUBE, STRAIGHT STREAM PATTERN





Expansion 1000 Grams 9.3107 Grams

15

TABLE 17. FOAM EXPANSION TEST RESULTS OF BUMPER TURRET AND TWOROOF TURRET FOAM TUBES, STRAIGHT STREAM PATTERN





Weight of Foam Solution if it Filled the Pan = 1000 Grams

Expansion = 1000 Grams 8.8

16

I . ., . o . , . , . , . . . .

Fi

TABLE 18. FOAM EXPANSION TEST RESULTS OF BUMPER TURRET ONLY,

DISPERSED PATTERN




Weight of Foam Sample = 408. Grams - 266 Grams = 142 Grams


Expansion = 1000 Grams -Exano 142 Grams

1=.4

17

o

TABLE 19. FOAM EXPANSION TEST RESULTS OF BUMPER TURRET AND ONEROOF TURRET FOAM TUBE, DISPERSED PATTERN





Expansion = 1000 Grams 7

13 18

4: -' "2- - -- " '

q

TABLE 20. FOAM EXPANSION TEST RESULTS OF BUMPER TURRET AND TWOROOF TURRET FOAM TUBES, DISPERSED PATTERN





Weight of Foam Solution if it Filled the Pan 1 1000 Grams

1000 GramsExpansion = 15Z Grams = 6.6

19

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in 4D. .Le

4- 40

IA 20

SECTION V

ANALYSIS

All requirements of the Statement of Work (SOW for the"Oscillating Bumper Turret System AS 32/P-4 Fire Vehicle,* dated16 February 1978; and the current Fire Protection AssociationPamphlet Number 412, "Test Procedures for Aircraft Rescue and FireFighting Vehicles," were met or exceeded during tests conducted at

- the contractor's location or at Eglin AFB, Florida.

Discharge Capacity Tests conducted indicated that satisfactorydischarge results were obtained in gpm, maximum turret range,pattern width, and angle cone requirements. These tests wereaccomplished utilizing both plain water and a solution of 94

* percent water and 6 percent AFFF.

Foam expansion of 5 was exceeded for all turret operationalselections available.

Twenty-five percent minimum drainage time of 4.8 minutes wasexceeded for all turret operational selections available.

Road test results indicated that operational problems would notbe encountered during off-the-road operation. In addition, the

*- ability of the driver to operate the oscillating bumper turret with- the vehicle in motion was displayed. During critical personnel

shortages, this feature would enhance the P-4's operationalcapability. Foam Pattern Tests (Tables 1 through 12) indicatedthat an excellent variety of options are available for use and thatacceptable patterns were produced during all of the field testsconducted at the contractor's location.

Excellent results were obtained during tests using the bumperturret. Fires were extinguished in minimum time utilizing lessfoam concentrate than normally is used with the original equipmentinstalled. Use of the non-air-aspirated turret enhanced firecontrol and extinguishment, and burn-back times were acceptableduring these test fires. The fourth fire conducted demonstratedthat superior fire suppression capability is available when theautomatic self-oscillating bumper turret feature is used.

2i

SECTION VI

CONCLUSIONS

The self-oscillating bumper turret feature is a major tech-nological breakthrough in fire suppression capabilities. Itminimizes or eliminates the possibility of human error: i.e.,even distribution of AFFF was always achieved and no agent build-up or waste was experienced during any of the tests conducted.

All requirements of the statement of work (SOW) for the

oscillating turret system were met or exceeded during testsconducted. Power for the oscillating turret system was providedby the truck's standard 24-volt electrical system and 500 psihydraulic system. Reliability of the system was demonstratedduring operational tests, as no breakdowns were experienced.Maintenance of these systems requires no special skills or train-ing.

This system provides a fire suppression capability that issuperior to the man/machine method previously available.

22

SECTION VII

RECOMMENDATIONS

It is recommeded that all USAF AS 32/P-4 fire vehicles beequipped with the automatic, self-oscillating bumper turretfeature. Further, it is recommended that consideration be givento converting the roof turret to the automatic self-oscillating

*type.

Additionally, it is recommended that all future crash fireapparatus be equlppped with non-air-aspirating turrets. Theserecommendations are considered to be cost effective, when theadvantages gained are considered.

23

4: -/ -" : i : --' -' : , , ., , ..... ..... . .. .. .. ....... ... . . ., _ _ .: -

BIBL IOGRAPHY

Department of the Air Force. "Oscillating Turret System Test,* Non-Air-Aspirating" (Letter 15 November 1979 from DEF to

HQ AFESC/DEF, Eglin AFB, Florida.

* Department of the Navy. Comparative Nozzle Study for ApplyingAqueous Film Forming Foam On Large _ Scale Fires, ,CLLU-iK-75-ZZ.Washington, D.C. 20 37b: Naval Research Labodratory, April 1978.

* FEECON Corp. Report, Contract No. F086 535-78-0-0031, Oscillating* turret System A/S 32 P-4 Fire Vehicle, February 1980.

- NFPA Standard No. 412, Evaluating Foam Fire Equipment on Aircraft'Rescue and Fire Fighting Vehicles. Boston, Massachlusetts, 1974.

NFPA Standard No. 414, Aircraft Rescue and Fire Fighting Vehicles.Boston, Massachusetts, 1914.

42

APPENDIX

P-4 OSCILLATING BUMPER TURRET

25

APPENDIX

A. DESCRIPTION

1. Turret Controls. The turret controls are located inside thecab. The manual override lever controls the pressure in theturret hydraulic system (refer to Figure A-i) and the elctricalsystem of the turret. Lifting the lever to the manual positionallows the turret to be operated manually.

The turret shutoff valve is opened by pulling back on themanual shutoff valve handle. The shutoff valve is closed bypushing the valve handle forward. The turret is aimed by themanual control handle and is synchronized to discharge in thedirection in which the handle is pointing.

Lowering the manual override lever to the automatic positionactivates the hydraulic and electrical systems. The turret shut-off valve is operated by the shutoff valve toggle switch. Thespeed of oscillation can be regulated from 0° per second to 600 persecond by the oscillation speed control knob. Turning the knobclockwise slows down the speed of oscillation to where it can bestopped; turning the knob counterclockwise increases the speed.The arc and direction of oscillation are regulated from 0* to 1700by sliding the stop levers to the desired settings. The turretelevation is controlled by the manual control handle and locked inplace by rotating the elevation lock lever clockwise. Rotatingthe lock lever counterclockwise unlocks the turret elevation.

The discharge pattern is regulated by the pattern controllever. Raising the lever to the top of the slot gives a straightstream pattern while lowering the lever gives a dispersed pattern.The lower the lever, the wider the pattern becomes.

2. Turret Elevation. The turret elevation is regulated by themanual control handle which raises or lowers the elevation controlrod that is attached to one end of the elevation control link(refer to Figure A-7). The elevation control link pivots on the

4 pivot link. The elevation shaft is attached to the turret end ofthe pivot link. The bottom of the elevation shaft has gear teethto drive the elevation gear that is attached to the turret head.By lowering the manual control handle, the elevation control rodis raised. The elevation shaft is lowered, rotating the headupward, and causing the turret steam to be elevated. Raising thehandle lowers the stream.

The turret can be locked in any elevation position by the ele-vation lock lever which is attached to a cam. Rotating the leverclockwise causes the cam to push the elevation control rod against

26

The column tube, allowing it to bind. The turret will stillrotate. Rotating the lock lever counterclockwise releases thelock.

3. Turret Hydraulic System. The turret is powered by the truck'shydraulic system which is activated by putting the agent selectorvalve in either the "Foam" or "Water" position. There is a bypassvalve in the truck hydraulic system which opens and allows the oilto circulate when neither the bumper turret nor roof turret are inhydraulic operations. This circulation of oil prevents thehydraulic pump from overheating. The bypass valve is closed whenthe roof turret decontrol valve is placed in the "Turret Hydraulicposition and the roof lock is in the "Unlock" position, or thebumper turret manual override lever is in the Auto" position.

Placing the manual override lever in the "Auto" positionpushes a rod that rotates the decontrol valve shaft. The shafthas three ports to allow oil to pass through the valve. The

*lower port allows oil to pass from one end of the shutoff valveactuator to the other end. The middle port allows oil to flowfrom one end of the rotation actuator to the other end. The topport allows oil to flow from the pressure feedline to the twofour-way solenoid valves that control the rotation and shutoffvalve actuators. The pressure feedline port is open and the lowerports are closed when the manual override lever is in the "Auto"position. When the manual override lever is in the "Manual"position, the pressure line port is closed. The ports allowingthe oil to flow between each end of the shutoff valve actuator androtation actuator are open. The turret can then be operatedmanually.

4. Turret Rotation.

a. Manual Operation. The manual control handle operatesturret rotation. Rotating the handle left or right causes theelevation control rod to rotate. Keyed to the rod is a sprocketthat rotates the drive sprocket by means of a chain. The drivesprocket is attached to the rotation shaft that rotates the turretbody. Pointing the manual handle to the left aims the stream tothe left. Pointing the handle to the right aims the stream to theright.

b. Automatic Operation. The rotation hydraulic actuator is acylinder with an internal gear rack that can oscillate back andforth. At both ends of the cylinder is a port for the hydrauliclines which connect to the four-way solenoid valve. The solenoidvalve directs the oil flow from the pressure line downstream ofthe decontrol valve, to either end of the cylinder. The oilpressure pushes the piston rack to the other end of the cylinder.The oil on the other side of the piston rack is forced out of thecylinder and through the return line of the solenoid valve.Between the decontrol and solenoid valves is the speed control

27

4

valve, which regulates the flow of oil into the cylinder. Thegreater the flow of oil, the faster the cylinder moves. In thecenter of the cylinder is a cutout, so the teeth of the pistonrack are exposed. The piston rack drives a gear that is keyed tothe rotation tube. The rotation tube is keyed to the turret bodyand causes the turret to rotate. The actuator has enough stroketo rotate the turret 1700.

As the rotation tube rotates, the sprocket on the tuberotates, causing the elevation control rod and control handle torotate. Connected to the control handle is the contact bracketthat rotates between the two stop levers on the column base. Oneach stop lever is a microswitch. The turret rotates in onedirection until the contact bracket hits a microswitch on one ofthe stop levers. This activates the solenoid valve and changesthe direction of the actuator and turret rotation. The turret willcontinue to rotate in this direction until the contract brackethits the microswitch located on the other stop lever, and thesolenoid reverses the flow of oil and turret direction.

5. Shutoff Valve Assembly. The shutoff valve actuator is similarto the rotation actuator nd works the same way. The flow of oilis directed into either end of the actuator by a four-way solenoidvalve that is controlled by the shutoff valve toggle switch. Theactuator drives a gear that is keyed to the upper stem. The upperstem rotates the ball inside the shutoff valve. On one end of theactuator is a bracket with a switch on it. This switch controlsthe bumper turret foam shutoff valve. The foam valve is closedwhen the discharge valve is closed. When the shutoff valve isclosed, the valve handle depresses the switch.

6. Pattern Control. On the downstream end of the foam tube is ahousing that contains two deflectors. These deflectors are pla-tes that pivot on the top and bottom of the housing. The deflec-tors have a leg on both sides of the plate that mesh with the twolegs of the mating deflector. If one deflector is rotated so theplate moves out of the path of the stream, one leg will push theother deflector ,ut of the path of the stream also. Likewise, ifa deflector is rotated into the path of the stream, one leg will

* push the other deflector into the path of the stream. Thesedeflectors are operated by a deflector control rod that attachesto a cable. The cable attaches to the deflector control leverthat is located on the control box inside the cab. Raising thelever to the straight stream position pulls the cable and deflec-tor control rod backwards. The deflectors are rotated out of the

*l path of the stream for a straight stream pattern. The straightstream pattern provides maximum range. Lowering the lever pushesthe cable and deflector control rod forward " the deflectors arerotated into the stream for a dispersed patte The dispersion ofthe stream produces a flat fan-shaped pattern o, h less rangethan the straight stream. The more the lever is lowered, the

I wider the fan becomes and the shorter the discharge range.

28

a

7. Removal of Shroud and Existing P-4 Bumper Turret.

a. From inside the cab, remove the attaching screws andturret cover plates. The screws will be used later to attach thenew cover plate.

b. Remove the attaching screws and lockwashers from the inletflange.

c. Disconnect the #414 wire from the electric floodlight inthe shroud covering of the bumper turret.

d. Inside the shroud there are two tubing lines. One ismade of copper and the other is made of rubber. Each ine has atee. Disconect the middle line of each tee.

e. From outside the truck, disconnect the two clamps thathold the windshield washers.

f. Remove attaching screws, lockwashers and shroudassemblies.

g. Remove attaching screws and lockwashers from bumper turretmounting bracket to take off turret. Screws and lockwashers willbe used later to install new oscillating bumper turret.

CAUTION

The turret is heavy and more than oneperson is required to remove the turret.

29

I(

B. TURRET INSTALLATION

1. Oscillating Bumper Turret Disassembly.

a. Put the manual override lever in the manual position.

b. Close the shutoff valve (push the handle toward theturret).

c. Take off the gear cover on the shutoff valve assembly byremoving the four #4 screws (see Figure A-3).

d. Unscrew the hex nut from the top of the shutoff valveassembly. Then remove the handle, gear and key from the upperstem.

e. Remove the mounting plate from the shutoff valve byunscrewing the four 1/4-20 screws and lockwashers.

f. Pull out the upper stem. Do not lose the thrust washerpositioned on the upper stem. Note the position of the stem'skeyway, so the stem will be reassembled in the same positionlater.

g. Disconnect the hydraulic coupling.

h. Unscrew the 2-inch elbow by the hydraulic coupling fromthe upper portion of the piping.

i. From inside the cab, disconnect the switch bracket fromthe turret main valve.

j. Disconnect the main valve from the bumper turret feedline.

NOTE

The water tank should be drained beforeremoving the shutoff valve.

K. Connect the mounting bracket and turret to the truck usingthe same screws used to mount the other turret.

1. Connect the oscillating bumper turret shutoff valve and,- upper portion of the piping assembly to the bumper turret

feedline. The ball valve should be in the 'closed position and thehole for upper stem should be straight up on top. The nipple justafter the 2-inch elbow should be aimed straight down.

30

i

NOTE

Use Piping compound when connecting allpipe threads.

m. Put the 2-inch pipe of the feedline piping assemblythrough the 2-5/8-inch hole on the bottom of the bumper turretmounting bracket and connect the 1-inch elbow and victaulic nippleto it.

n. Connect the piping assembly to the turret with the 2-inchvictaulic coupling.

o. Reassemble the stem, thrust washer and mounting plate tothe shutoff valve with the four 1/4-20 screws and lockwashers.Lubricate and be careful not to damage the "0" ring on the stemwhile assembling. Be sure the position of the stem's keyway isthe same as before the valve was disassembled.

p. Reassemble the gear, key, handle, roll pins and the 5/8-11nut to the valve. The handle should be assembled on the oppositeside of the actuator.

q. Assemble the gear cover to the shutoff valve assembly with

the four #4 self-trapping screws.

2. Roof Turret Modification (To be performed as necessary).

a. Disconnect the ball valve handle and the two knobs for theroof lock and decontrol valve; remove the one section of falseceiling.

b. Using a #30 drill (0.128 diameter), drill two holes asshown in Figure A-4 for the relay bracket.

c. Using a #28 drill (0.140 diameter), drill a hole as shownin Figure A-4 for the tie clip.

d. Add a 3/8-inch NPT tee and 3/8-inch x 1-1/2-inch nipplebetween each of the two hydraulic lines and the roof turret. Dothem one at a time so as not to cross the lines. Aim the middleport of the tees toward the front of the truck.

e. Connect a 3.8-inch x 1/4-inch NPT bushing to the middleport of each tee.

f. Connect a 1/4-inch x 3/8-inch tube fitting to eachbushing.

g. Connect a length of 3/8-inch tubing to the tee on thepressure line that runs to the front corner of the roof turret(approximately 22 inches in length).

31

h. Connect a length of 3/8-inch tubing to the tee on thereturn line that runs to the front corner of the roof turret(approximately 18 inches in length).

i. Add a 3/8-inch x 3/8-inch x 900 tubing elbow to each line.

Aim the other end of each elbow towards the center of thewindshield.

j. Connect a 3/8-inch length of tubing approximately 17inches long to each line.

k. Connect a 3/8-inch x 3/8-inch x 900 tubing elbow to bothlines. Aim the other end of each elbow towards the floor.

1. Connect a 3/8-inch length of tubing (approximately 3-1/2feet long) from the pressure line to the port of the bumper turretmanifold. Run the tubing through the big tube on the center ofthe windshield.

m. Connect another length of tubing from the return line tothe return port of the bumper turret manifold.

n. Attach the hydraulic tubing lines to the roof turret,using two "P" clips (see Figure A-4).

o. Approximately 10 inches from the 3/8-inch tee in thepressure line and just below the 900 elbows in the center of thewindshield, connect the two hydraulic lines together with cableties.

p. Attach the relay, socket, and holddown spring to the relaybracket.

q. Using two 1/8-inch pop rivets attach the relay assembly tothe roof turret panel as shown.

r. Cut the hydraulic pressure line inside the roof turretpanel 1 inch downstream of the manifold.

s. Add a 1/4-inch NPT x 3/8-inch tube straight fitting toboth sides of the two-way solenoid valve.

t. Assemble the solenoid valve into V- pressure line at thebreak.

u. Assemble one of the solenoid lead wires to the #5 post onthe relay. Ground the other lead.

v. Connect a wire to the letter "B" post on the relay andground the other end.

w. Disconnect the roof lock switch lead from ground and con-nect it to the letter "A" post on the relay.

32

x. Connect another wire from the power side of the roof lockswitch to the #9 post on the relay.

3. Rewiring Relay for Turret Hydraulic Relief Valve, Foam andControl Valves which are located in Ladder Compartment.

a. Remove the #376 wire from the #8 and #3 post.

b. Remove the #439 wire from the #7 post and connect it tothe #8 post and the #407 wire.

c. Connect the #376 wire to the #7 post and ground the otherend.

d. Connect a wire from the #3 post to the roof turret relay's#6 post.

e. Attach another wire on the #6 post on the roof turretrelay, that connects to the bottom of the first row closest to thecab on the bumper turret terminal strip (see Figure A-S).

f. Connect a wire from the #8 post on the roof turret relayto the middle row (24-volt power post) on the bumper turret ter-minal strip.

g. Remove the attaching screws and circuitry panel next tothe driver's seat.

h. Connect a wire from the top middle post on the bumperturret to the #448 wire and the circuitry panel.

i. Reassemble the false ceiling and knobs to the roof turret.

J. Replace the circuitry panel and attaching screws.

k. Assemble the shroud and attaching screws to the bumperturret mounting bracket and the front of the truck.

1. Reconnect the two clamps that hold the windshield washersto the front of the truck.

m. From inside the truck, reconnect the #414 wire to thefloodlight.

n. Reconnect the rubber and copper tubing lines.

o. Attach the one-piece dash board cover plate using thescrews which used to hold the two-piece cover plate.

33

4-

C. OPERATING PROCEDURES

1. Automatic Oscillation

a. Unlock the turret elevation. Remove turret from storagelock position by raising the turret and rotating it to the rightso that the storage lock bracket on the turret is free of thebumper bar. Rotate turret to approximate direction of dischargedesired.

b. Set levers controlling arc of oscillation to desiredpostions.

c. Set turret on desired height by moving control handle up

or down and lock into position with locking lever.

d. Set pattern selector to desired pattern.

e. Move discharge switch to the "Open" position.

NOTE

This can be preset. Discharge valvewill not open until manual override leveris on "Auto."

f. Place agent selector (located on the equipment operator'scontrol panel) in the desired position - "Foam" or "Water."

g. Move manual override lever to "Auto." Turret will beginto oscillate and discharge valve will be open.

h. Adjust speed of oscillation for best fire control (thiscan be preset at a desired speed).

I. Adjust pattern control to desired pattern for best firecontrol.

J. Adjust arc of oscillation, height setting, and streampattern as truck moves closer to fire, to obtain best fire control.

k. After fire suppression operation is completed, movedischarge switch to "Close" position.

1. Move manual override lever to "Manual."

m. Return the turret to the stored postion by elevating androtating the turret to the left until it hits the bumper bar.Lower the turret until the lock bracket slides around the bumperbar. Lock the turret elevation.

34

n. After returning to station, flush turret, proportioner,piping, handlines, etc., with plain water.

2. Manual Operation.

a. Remove turret from storage lock position by raising theturret and the bumper bar. Rotate turret to approximate directionof discharge desired.

b. Check to see that manual auto lever is on "Manual."

c. Set pattern selector to desired pattern.

d. Place agent selector (located on the equipment operator'scontrol panel) in the desired postion - "Foam" or "Water."

e. Manually open discharge valve .v rotating valve handleclockwise.

f. Aim turret with the manual control handle.

NOTE

Turret can be locked vertically with lock-ing lever if desired.

g. Adjust pattern control to the desired pattern for bestfire control.

h. After fire suppression operation is completed, shut offvalve manually.

i. Return the turret to the stored position by elevating androtating the turret to the left until it hits the bumper bar.Lower the turret until the lock bracket slides around the bumperbar. Lock the turret elevation.

J. After returning to station, flush turret, proportioner,piping, handlines, etc. with plain water.

35

D. MAINTENANCE

1. Preventive Maintenance.

a. Thoroughly flush turret with plain water after eachoperation.

b. During periodic vehicle servicing, remove front end out-side cover panels and check all mounting and nuts for tightness.Check all hydraulic connections for leakage. Check all wire con-nections for tightness.

c. Check all screws and nuts on foam tube for tightness.

d. All main turret seals are "0" rings as shown on parts*identification drawings in the manual. When replacing "0" rings,

lubricate and insert mating parts carefully to prevent cutting or- damaging seals.

- 2. Elevation Adjustment. Turret should have an arc of elevationfrom 15' below the horizontal to 450 above the horizon. Theturret handle should point in the same direction as the turret.The elevation can be adjusted using the following procedure:

a. Disconnect stud and locknuts from the elevation controllink so that the turret is free of the manual control handle.

b. Pull up on elevation shaft until it clears the gearsegment on the head.

c. Move the gear segment one or two teeth in necessary direc-tion and push shaft down until gears re-engage.

d. Push shaft down and reassemble the stud and locknut.

e. Check to see that manual control handle and turret areaimed in approximately the same direction.

f. If turret and manual control handle are not synchronized,repcdt procedure.

3. Rotation Adjustment. The turret should be capable of a mini-mum arc of rotation of 1700, 85" to the left or right of the truckcenterline. The turret handle should point in the same directionas the turret. The turret rotation can be adjusted using thefollowing procedures:

a. Aligning the Turret and Rotation Actuator.

(1) Place turret in "Manual" mode.

36

(2) From outside the truck, rotate the turret until thepiston rack tooth with the "X" stamped on it is in the center ofthe cylinder.

(3) Loosen the attaching screws to the rotation actuatorand slide the actuator away from the gear until the teeth are nolonger in contact with the piston rack gear teeth.

(4) Rotate the turret so the foam tube is centered infront of the truck.

(5) Slide the actuator toward the gear until the pistonrack teeth mesh with the gear teeth. The foam tube might have tobe rotated slightly to the right or left for the teeth to meshproperly. Tighten the screws so the actuator will stay in place.

(6) Rotate the turret all the way to the left and rightto be sure of equal motion to both sides. If the motion is notequal to both sides, repeat step a.(3). Move the turret so thegear rotates the number of teeth required in the desired directionand repeat step a.(5).

b. Aligning the Turret and Manual Control Handle.

(1) Disconnect the chain by removing the clip from themaster link and sliding the master link from the chain. Remove thechain from the sprockets.

(2) Rotate the handle so it is pointing in the samedirection as the turret.

(3) Reconnect the chain to the two sprockets andreassemble the master link and clip to the chain.

4. Pattern Control Adjustment. The deflectors should be capableof being opened wide enough to be out of the path of the streamand being closed to within 1/4 inch of each other. If they donot, the pattern control should be adjusted accordingly:

a. Pattern Control Lever Adjustment.

(1) Move the lever all the way up and down. The levershould not be restricted by either end of the slot.

(2) From behind the control bracket, remove the screw andnut that attach the rod end bearing on the end of the deflectorcontrol cable to the handle bracket.

(3) Loosen the nut that locks the rod end bearing ontothe cable.

(4) Thread the bearing in or out so the lever is clear ofthe ends of the slot, and lock the rod end bearing in place withthe locking nut.

37

(5) Reassemble the rod end to the handle bracket with theattaching screw and nut.

b. Deflector Control Rod Adjustment.

(1) From outside the cab, punch out the roll pin thatconnects the deflector control rod to the lower deflector.

(2) From inside the cab, push the pattern control leverdown as far as it can go (widest disperse position).

(3) Loosen the nut that locks the deflector control rodonto the cable.

(4) Move the deflectors so they close to within 1/4-inchof each other.

(5) Thread the deflector control rod in or out until theroll pin holes in the control rod line up with the holes in thelower deflector. The cable thread length is 7/8 Inch. Be surethere is sufficient thread after adjustment to engage the deflec-tor control rod. Lock the control rod in place with the lockingnut.

(6) Pin the control rod to the deflector with the roll

pin.

5. Turret Head Removal.

a. Remove the shroud assembly.

b. Disconnect the attaching nuts and stud from the elevationshaft link so the turret is free of the manual control handle.

c. Pull up on the elevation shaft until it is clear of thegear and lift out completely.

d. Punch out the roll pin that connects the deflector controlrod to the lower deflector.

e. Remove the attaching screws and cable holder bracket fromthe turret head.

f. Disconnect the counterbalance spring from the eyebolt onthe turret base.

g. Remove the retaining ring and end cap from the side of thebody.

h. Disconnect the attaching screw and Stat-O-Seal from theturret head.

38

i. Slide out the elevation bearing from inside the body andhead. Remove the head from the body. Hold the foam tube and headwhen removing the bearing.

6. Turret Head Reassembly (see Figure A-6).

a. Examine the "0" rings on the elevation bearing and replaceif they are damaged. Lubricate the "0" rings before reassemblingthe bearing.

b. Place the head and foam tube between the arms of the body.Slide the bearing into the body and head. Note the cutout in thebearing should be oriented to line up with the foam tube.

c. Assemble the Stat-O-Seal and attaching screw to the headand elevation bearing. The head or bearing might have to berotated slightly so the two holes line up.

d. Follow the elevation adjustment procedures for aligning

the manual control handle with the turret.

e. Connect the counterbalance spring to the eye hook on the

turret base.

f. Assemble the cable holder bracket to the head.

g. Pin the deflector control rod to the lower deflector withthe roll pin.

h. Reassemble the shroud assembly.

7. Turret Body Removal.



c. Pull up on the elevation shaft until it is clear of thegear segment on the head and lift out completely.

d. Remove attaching screws and cable bracket holder fromturret head.

e. Punch out the roll pin that attaches the deflector controlrod to the lower deflector.

f. Disconnect the counterbalance spring from the eyebolt onthe turret base.

g. Remove the chain from the drive sprocket by disconnectingthe attaching clip and master link.

39

h. Remove the nut from the top of the rotation tube.

i. Remove the key, sprocket, spacer, key gear, and secondspacer from the rotation tube.

J. Remove the #340 "0" ring, rotation tube, rotation bearingand body from the turret.

8. Turret Body Reassembly (see Figure A-7).

a. Lubricate the rotation bearing "0" rings before assembly.

b. Mount the rotation bearing, #340 "0" ring, body and rota-tion tube to the turret, with attaching screw.

c. Assemble the spacer, gear, key, second spacer, sprocketand key onto the rotation tube with the attaching nut.

d. Follow the instructions for aligning the turret and rota-tion actuator.

e. Follow the instruction for aligning the turret and manualcontrol handle.

f. Follow the instructions for the elevation adjustment.

g. Connect the counterbalance spring to the eyehook on the

base.

h. Assemble the cable holder bracket to the head with theattaching screw.

i. Pin the deflector control rod to the lower deflector withattaching roll pin.

J. Reassemble the shroud assembly.

9. Turret Base Removal.



c. Pull up on the elevation shaft until it is clear of the

gear and lift out completely.

d. Remove the nut from the top of the rotation tube.

e. Remove the chin from the drive sprocket by disconnectingthe attaching clip and master link.

40

Ii

f. Remove the key, sprocket, spacer, and gear from therotation tube.

g. Remove attaching screws and cable holder bracket from theturret head.

h. Punch out the roll pin that attaches the deflector controlrod to the lower deflector.

i. Disconnect the counterbalance spring from the eyebolt onthe turret base.

j. Disconnect the hydraulic coupling.

k. Remove the four screws and lockwashers that hold the baseonto the mounting plate. Hold onto the base while removing thescrews.

10. Turret Base Reassembly.

a. Assemble the base to the mounting plate with the fourattaching screws and lockwashers.

b. Attach the hydraulic coupling to the turret and pipingassembly.

c. Assemble the spacer, gear, key, second spacer, sprocketand second key onto the rotation tube with the attaching nut.

d. Follow the instructions for aligning the turret and rota-tion actuator (3.a).

e. Follow the instructions for aligning the turret manualcontrol handle (3.b).

f. Follow the instructions for the elevation adjustment (2.).

g. Connect the counterbalance spring to the eye hook on the

base.

h. Assemble the cable holder bracket to the head with theattaching screws and lockwashers.

i. Pin the deflector control rod to the lower deflector with

the attaching roll pin.

J. Reassemble the shroud assembly.

11. Foam Tube Assembly Removal.

a. Punch out the pin that connects the deflector control rodto the lower deflector.

41I

b. Loosen the locking nut on the back of the deflector

control rod. Unthread the deflector control rod from the cable.

c. Remove the nut and spring from the cable.

d. Unthread the foam tube from the head.

e. Remove the "0" ring from the head.

12. Foam Tube Reassembly.

a. Assemble the "0" ring over the threads of the head.

b. Thread the foam tube assembly onto the head. The foamtube assembly should snug up to the m'0 ring. The deflectorhousing should be oriented so that the lower deflector is on thebottom.

c. Slide the spring over the cable.

d. Thread the locking nut and deflector control rod onto thecable.

e. Follow the instructions for adjusting the deflectors.

42

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Documents

OSCILLATING TURRET(U) UNCLASSIFIED EU MR ...D-RI23 .373 AUTOMATIC OSCILLATING TURRET(U) FEECON CORP WESTBOROUGH I/I. MR J GAGL IARDO ET AL. MAR 81 ESL-TR-88-64 FY-8952-79-6888P EEEEEE