tm 9-1750 power train unit, three-piece differential case, for medium tanks, m3, m4, and...

8/12/2019 TM 9-1750 Power Train Unit, Three-Piece Differential Case, For Medium Tanks, M3, M4, And Modifications 1942

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dvance copyfor urdn nce Office on]?tlH @ |D 78S 97 TM

W R DEP RTMENTTECHN ICL MNU L

O R D N A N C E M A I N T E N A N C EP O W E R T R A IN U N IT T H R E E - P I E C E

M F F E R E N T I A L C A S E F O R M E D I U M T A N K S M 3 fl A N D M O D I F IC A T I O N S

MARCH 1 1942

REGR DED UNCL SSIFIED YAUTHQWTYOF DOD DIRBY


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RESTRI TETM 9-1750

ORDNANCE MAINTENANCEPOWER TRAIN UNIT THREE-PIECE DIFFERENTIAL CASEFOR MEDIUM TANKS M3 M4 AND MODIFICATIONS

Prepared under the direction of thehief of Ordnance

ONTENTS


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INTRODUCTION

1. PURPOSE

2. SCOPE

3. REFERENCES.


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RP2

FG

OWTNUT

In


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DESCRIPTION

4 CONSTRUCTION

FIOURE 2 NTERIOR OF DRIVER S COMPARTMENT


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DESCRIPTION

fig. 3 .

FIGURE 3 REA THERS USED ON POWER TRAIN

5 OPERATION

fig. 47b.


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4


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RA PD 5252SUMP

FIGURE 4OIL SYSTEM OF THE TR NSMISSION WITHOUT OIL COOLER


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:o O

RPD5

FGURE

LSYSTMINTRNMSOEQUIPPEDWTHOLCOOLER


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REMOVAL OF THE POWER TRAIN UNIT FROM HULL

6 GENERAL.

7 STEP S IN REMOVING POWER TRAIN UNIT FROM HULLEquipment.

b e necessary tofig. 94)

fig. 7 .


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RA PD 4888FIGURE 6 TURNING E ENTRI TO LOOSEN TRACK

FIGURE 7 TRACK B ROK E N A H E A D OF FRONT WHEEL


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f

PD 937

FIGURE 8RIGHT SID E OF DRIVER S COMPARTMENT


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fig. 5).

slowly.


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RAPD2

FGURE9OWETNCRRIERUNDEPOWETN


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t


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RA PD 2941

FIGURE 11 POWER TRAIN PARTLY PULLED OUT OF TANK

Ul Li i . s . . ; ' rvs

FIGURE 12 POWER TRAIN COMPLETELY OUT OF TANKRA PD 2942

15


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DISASSEMBLY OF COMPONENT SSEM LIES

8 TRANSMISSION ANDPARKING BRAKE ASSEMBLY

b. Equipment.

figs. 13 and14).


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RA PD 2943

FIGURE 13 CUTAWAY OF PARKING R KE

fig. 23fig. 15).

disassemble transmission. NOTE conditions,


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TM 9 1750 O R D N A N C E M A I N T E N A N C EP O W E R T R A I N U N I T , T H R E E - P I E C E D I F F E R E N T I A L C A S E F O R M E D I U M T A N K S


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D I S A S S E M B L Y O F C O M P O N E N T A S S E M B L I E S

FIGURE 15 BRAKE DRUM P U L L E R

fig. 19 .

18 ,


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SO^k

mr3O

RAP

FGURE1T

MSOGEARASSEMBLES


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D I S S S E M B L Y O F C O M P O N E N T S S E M B L I E S

RA PD 2948

FIGURE 17 TRANSMISSION SHIFTING B RA CKETS

2


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RA PD 2949FIGURE 18 TRANSMISSION ON STAND

Vs-\n.


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T 91750 O R D N A N C E M A IN T E N A N C EP O W E R T R A I N U N I T T H R E E P IE C E D I F F E R E N T I A L C A S E F O R M E D IU M T A N K S

FIGURE 20 RANSMISSION REMOVED FROM DIFFERENTIA L

FIGURE 21 EAR SHIFT LEVER ASSEMBLY

24


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T M 9 1750D I S S S E M B L Y O F C O M P O N E N T S S E M B L I E S

- R A P D 2953FIG UR E 22 INION G EA R END OF TRANSMISSION WITH B EARING COVER REMOVED

RA P D 2954

FIGUR E 23 P ECIA L W RENCHESUSED ON PINION INPUT AND COUNTERSHA FT NUTS25


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RA PD 295SFIGURE 24 INION GEAR PUL L E R

fig. 23 .

24 .

fig. 23 .

fig. 25.

fig. -5)


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TM9-1750D I S S S E M B L Y O C O M P O N E N T S S E M B U E S

I _. mFIGURE 25 AISING TRANSMISSION COVER

R P D 2957FIGURE 26 RANSMISSION WITH COVER REMOVED

27


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TM 91750 O R D N A N C E M A I N T E N A N C EP O W E R T R A I N U N I T T H R E E - P I E C E D I F F E R E N T I A L C A S E F O R M E D I U M T A N K S

R PD 958

FIGURE 27 EMOVING FOURTH SPEED GEAR WITH A LOCKING ARM PULLER

, . * .-PR .. -^W ' ' .c ^ s sm R PD 2960F IG URE 28 SHIFT ROD SUPPORT B LOCKS AND INTERLOCK S


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T M 9 1750D I S S S E M B L Y O F C O M P O N E N T S S E M B L I E S

RA PD 2961FIGURE 29 NPUT SHAFT LIFTING NUT

fig. 27).

fig. 28).

40).

29)

(-fg- m.31).

29


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to

HSPEEDGER

RPD96

FGURE3

NPUTSHFSSEMBL


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RA PD 5251FIGURE 32 OIL PUMP USED IN TANKS EQUIPPED WITH OIL COOLER

fig. 33 .

fig. 34 .slowly.


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D IS S S E M B L Y O F C O M P O N E N T S S E M B L I E S

RA PD 525

FIGURE 33 WORKING PARTS IN OIL PUMP EQUIPPED WITH OIL COOLER

fig. 37).

fig. 39).

fig. 40).

fig. 40).

33


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TM91750 O R D N A N C E M A IN T E N A N C EP O W E R T R A IN U N IT T H R E E - P IE C E D I F F E R E N T IA L C A S E O R M E D IU M T A N K S

OUTPUTSH FT L IFTING NUT

OUTPUTSHAFT SSEMB L Y

R PD2964

FIGURE 34REMOVING UTPUTSHA FT34


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D I S A S S E M B L Y O C O M P O N E N T A S S E M B L I E S

FIGURE 35 OOL USED TO REMOVE RE A R COU NTERSHAFT B E A R INGfig. 40).

fig. 40).

40).

fig. 40).

35


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9

POU

3OU

S

AM


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D IS S SE M B L Y O C O M P O N E N T S S E M B L IE STM 91750

FIGURE 37REMOVING COUNTERSHAFT ASSEMBLY

FIGURE 38 OUNTERSHAFT ASSEMBLYRA PD 4832


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FIGURE 39 FIRST SPEED IDLER GEAR B E ING REMOVED

fig. 40).

fig. 40).

fig. 42).

fig. 45).

38


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R PD

FIGURE 41 ECOND AND THIRD SPEED SYNCHRONIZER

fig. 45).

fig. 45).

fig.45).

fig.44).

fig. 46).


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RPD5

FG

4SC

ANTHRDSPEEDSNOZDS

MED

s i


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R PD 5258

FIGURE 43 FOURTH AND FIFTH SPEED SYNCHRONIZER

9 SPROCKET AND HUB ASSEMBLIES Equipment.

10 FINAL DRIVE ASSEMBLIES Equipment.

figs. 47 and 48 .


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RAPD5

FGU

4FOHAFF

S

SHOZDS

MB


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FGURE4N

SHFSSEMBL


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T M 9 1750

R A PD 4836

FIG URE 46 OUNTERSHAFT A SSEM B L Y

fig. 49).

fig. 50).

fig. 50).


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RA PD 4851

FIGURE 48 INAL DRIVE UNIT REMOVED FROM ASSEMBLY

figs. 5 and52).

fig. 52.

11 STEERING BRAKE ASSEMBL IES. Equipment.


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T 9 1750D I S S S E M B L Y O F C O M P O N E N T S S E M B L I E S

FIGURE 51 EMOVINGFINALDRIVE SHAFT

FIGURE 5 FINAL DRIVE SHAFT AND BEARINGRA PD 4855

49


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fig. 53).

figs. 19 and 54).

RA PD 4856

FIGURE 53 EMOVING COMPENSATING DRIVE SHAFT

fig.20),

fig. 55).


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FIGURE 54 EMOVING STEERING BRA KE ASSEMBLY

FIGURE 55REMOVING BRA KE SHOE FROM HOUSING

RA PD 857

PD 48S8

51


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TM 9-1750D I S S S E M B L Y O C O M P O N E N T S S E M B L I E S

12. DIFFERENTIAL ASSEMBLY. Equipment.-

54).

figs. 47 and 54).

47, 57 and 64).

{figs. 47, 58, 59 and 64).

NOTE: fig. 59)

figs. 47, 58 and 60).


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FIGURE 57REMOVING DIFFERENTI L ROM HOUSING


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D I S S S E M B L Y O F C O M P O N E N T S S E M B L I E S

RA PD 4867

FIGURE 58REMOVING D IFFERENT IA L BEARING


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RA P D 4868

FIGURE 59 IFFERENTIA L BEARING FIXTURE

47, 60, 64).

figs. 47, 62and64).

fig. 62).

figs. 47, 61, 63and 64).


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RA PD 4871

FIGURE 61 EMOVING PINION GEAR NUT

b

58


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R PO4S7FIGURE 6 EEDLE BE RINGREMOVERANDNEEDLE BERINGDRIVERS

COMPENS TING CASE COVER

EVEL GEA R

FIGURE63 REMOVING BEVEL GE R

R PD4873


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RPO

Cn

FGURE6IFRENTLSSEMBL


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MAINTENANCE

13 PARKING B RA KE.

14 TRANSMISSION a

d. Snap ring on fourth

65)


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TM 9-1750 O R D N A N C E M A IN T E N A N C EP O W E R T R A I N U N I T T H R E E - P I E C E D I F F E R E N T I A L C A S E F O R M E D I U M T A N K S

MASTER SPACERHORSESHOE WASHER

BEARING RACEGEAR

65L B S . REQUIREDTO SEAT BEARINGS

I ' P P R CYLINDERHORSESHOE WASHER

RO L LERS

DE

DLs

___

R

) \

r ^ f_

L

_-_

N O T E : TH CORRECT SPACER THE LATERAL PLAY OFTH E GEAR SHOU L D BE.002 TO .004BEFORE TH E ASSEMBLY S MOUNTED ON THE SHAFT.

RA PD 5248FIGURE 65 IXTURE FOR DETERMINING WIDTH OF SPACERS FOR

TAPER-ROLLER BEARINGS62


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MAINTENANCE

fig. 65),

f. Oil collar.

g. Interlocks.

Oil

Cleaning and inspection.

15 REMOVE STEERING BRAKE SHOE ASSEMBLY

Equipment.

Procedure. ])

63


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figs. 66and67).

fig. 66). be

Disassemble reassemble brake shoe assembly.

FIGURE66 REMOVING LINK PINFROMC M

-fa


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RA PD 4864

FI6URE 67 PULLING BRAKE SHOES OUT OF HOUSING65


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MAINTENANCE

Install brake shoe assembly. figs.66, 67 68 .

fig. 92)

i. Adjust steering brake nut.


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ASSEMBLY OF COMPONENT ASSEMBLIES

16. DIFFERENTIAL ASSEMBLY Equipment.

Procedure.

R P D 4875

FIGURE 69-REPLACING PINION AND GE R IN RIGHT HALF OF COVER


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T M 9 1750A S S E M B L Y O C O M P O N E N T A S S E M B L I E S

figs.62 and 64).

RA PD 4876

FIGURE 70 EPL ACING PINION AND G E A R IN LEFT H A L F O F COVER69


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figs. 64 and 69).

figs. 64 and 69).

IMPORTANT:

figs. 59 and 71).fig. 59)


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S S E M B L Y O F C O M P O N E N T S S E M B L I E S

RA PD 4877MGURE 71 EP LACING D IFFERENT IAL BEARING

71


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FIGURE 72 MEASURING DIFFERENTIAL SHIMMING WITH DEPTH MICROMETER

figs. 47, 72 and73).


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Assemble transmission. a)figs. 74 and 76).

FIGURE 74FIRST SPEED IDLER SHAF T EXTENDING THROUGH COVER P LATE


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TM9-1750A S S E M B L Y O C O M P O N E N T A S S E M B L I E S

CAUTION:

b)

c) fig.46).

d)

e) fig. 42).

f) fig. 44).

g) figs. 30 and 45).


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h) figs. 36 and 40).

i) fig. 31).

76


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FIGURE 77 UTPUT SHAFT AND COUNTERSHAFT SUPPORTING FIXTURES

76 and 77).

p) fig. 78 .

r)

s) fig. 79).

79


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slowly,t) fig. 28).

u) figs. 80 and 81).

v)

FIGURE 78 OIL PUMP WIRING


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S S E M L S S E M L I E S

i

IMPUT SHAFT ASSEMBLY

FIGURE 79 EPLACING INPUT SHAFT ASSEMBLY

RA PD 4842

81


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FIGURE 80 REPLACING KEYS IN OUTPUT SH FT

RA P

FIGURE 8 GEAR DRIVING TOOL

8


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S S E M B L Y O C O M P O N E N T S S E M B L I E Sw)

x) figs. 82 and 84 .

fig. 82).84).

y)

RA PD4845

FIGURE 82 UTPUT SHAFT BEARING DRIVER

83


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R PDFIGURE 84 INPUT SH FT BEARING DRIVER

FIGURE 85 EASURINGPINIONBEARING SHOULDER WITH DEPTH GAGE

85


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fig. 23)

ff) fig. 18).

gg) fig. 14).

hh)

fig. 23)

ii) figs. 13 and 14).

jj) figs. 13 and 14).


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kk)

II)

R PD 4879

FIGURE87 CHECKING B C K L SH WITH G GE

mm)


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RA PD 4881

FIGURE 88 BEARING SURFACES


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RA PD 4882

FIGURE 89 INION BEARING SHIMS2) Assemble transmission with differential. a)

b)

fig. 17 ,


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CAUTION:

(c)

fig. 88)

(ee).


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b).

18. STEERING B R A K E ASSEMBLIES. . Equipment.-

RA PD 4860

FIGURE 90 REPLACING BRAKE SHOES


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A S S E M B L Y O F C O M P O N E N T A S S E M B L I E S

Assemble steering brake assembly. a)fig. 47).

CAUTION:

b) fig. 56 .

RA PD 4861

FIGURE 91 DJUSTING CENTERING BOLT

93


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e) figs. and 92).

fig. 92)

fig. 68).

f)

g) a), b),c), d), e) f)

Assemble steering brake assembly with differential assembly. a)

b)

c)a)

b)19. FINAL DRIVE ASSEMBLIES . Equipment.-

Vs- m.

Procedure. Assemble final assembly. a)fig. 47).

CAUTION:


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CAUTION:

b) fig. 50).

c)

d) fig. 50).

e)fig. 47).

f) fig. 48).

g)b), c), d) e)

Assemble final drive assemblies to steering brake housings. a)

b)

c)

d)a), b), c)


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A S S E MB LY OF POWER TRAIN AND RELATED P A RT STO HULL

21. INSTALL POWER TRAIN IN HULL. Equipment.-

Procedure.

RA PD 4884

FIG URE 93 ULLING POWER TRAIN INTO HULL


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R PD 886

FIGURE 9 ULLINGTRCKOVERDRIVESPROCKETS

94, 95, 97 and 98.

98


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RA PD 4887

FIGURE 95 ULLING ENDS OF TRACK TOGETHER


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LIST OF MAJOR OVERHAUL TOOLS

Mark Quantity

jacks


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REFERENCES

23 TECHNICALMANUALS AND FIELD MANUALS

24 STANDARD NOMENCLATURE LISTS


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P O W E R T R A I N U N I T , T H R E E - P I E C E D I F F E R E N T I A L C A S E F O R M E D I U M T A N K S

L I S T OF ILLUSTRATIONSFigure Jitle

41 Second and third speed synchronizer ....................... 40


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L I S T O F I L L U S T R T I O N S

Figure Title Page


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Figure Title Page


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INDEX TO TEXT

cover 7

below)

re r 83

gasket ......................... 80

output shaft gears


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I N D E X T O T E X TBro ke, parking Co n t inued age

illustrated 13, 18i ns ta l l ing 87-88

maintenance of 61relining 61

Brake, s teer ing, assem b lies See a/so Brakeshoe an d B rak e shoe as semb ly )

adjus t i ng 4assem bl ing 92-95disassemb l ing 47-50

i l lu s t ra ted 51lever , operation of 6

Brake ad jus tmen t 63-67il lustrated 66

B rake d rumassemb ly 93-94

instal l ing on output shaft. 87in s tal li ng in housing 93-94

d isassemb l ing 17

illustrated 52Brake linkage co nnect ing . 99Brakes, relining

parking 61steer in g 64

i l lu s t ra ted 64 65 66

Cam, r emov in g l in k pin from. 64Carrier power tran 12, 99

i l l ust ra ted 13, 14Co m p ensat ing cas e

i l lu s t ra ted 46 54 60C o m p e n sat in g gears 70Co m p ensat ing drive sha f t , removing. 50Compensa t ing sha f t , rem ov ing 52Co nn ec t i ng hook , t rack, illustrated. 104

assem bl ing 75bearing i ns tal l ing 84-86disassem b l ing 40-42h ou sing, insert in g in 75il lustrated 37 45r emov ing 33

i l lus trated 37

Co ver plate differential Pagei l l us t ra ted 46 51rem o v ing 53

Co v er , tr ansmission

remo ving 26

Depth gage illustrated 85Different ial assem b ly

as sem b l ing 68-73cover plate 53

illustrated 46 51descr ibed 6-7d is assemb l ing 53-58h o u s ing, remov ing from illustrated.... 54il lustrated. 46 51 54 55 56

57 58 59 60 71Disassembly o f c o m p o n en t as sembl ies . 16-58

differential as semb ly 53-58bearings end 53co m p en sat ing case 53-58cover pate 53holder pate 53i l lus trated 54 55 56

final drive assem bl ies . 42-47cover 47

herringbone gear. 45p in io n and gear 45

sp rocke t and h ub assembl ies . 42steer ing brake as sembl ies. 47-53

b ush ings , brake sh aft, removing. 53c om p ensat ing shaft. 52-53co m pensat ing drive shaft. 50different ial removing from. 50

shoes, brake 50-52transmiss ion and parking brake

assemb ly 16-42bearing cover , front. 22-26brake d rum 17

coun te rsh af t assemb lyd isassemb l ing 40-42releasin g at front. 22-26remov ing 33dr ive s h af t cover. 47

gear four th-speed rem o v ing 29gearsh i f t lever assemb ly . 19-22gears, rem ovin g 19-22inpu t s h af t assemb ly

cap s rem oved 22d isassemb l ing 38-40re leased at front. 22-26rem ov ing 29


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N

Page

location of 4


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I N D E X T O T X TPage

Pinion gearbearing, removing 22-26nut, removing, illustrated 58puller, illustrated 26

Power, how transmitted 5Power train carrier. 12, 99

described 12illustrated 13, 14

Power train unitassembly of 68-97construction of 4-5described 4-7disassembling 16-58illustrated 3installing in hull. 98-104

102, 103, 104lubrication of 6-7maintenance of 61-67oil, draining from 19operation of 5-7removing from hul 9-12

Puller, illustratedbrake drum 19

pinion gear 26Pul-lift 100

Remover, needle bearing 56Reverse

c lu t ch gear, removing 35idler gear, removing 33

Roller bearings, spacer width of 61-63il lustrated 62

Shifting 5

causes of difficulty in 61Shifting block

installing 80removing 29

illustrated 28

Shifting forks, assembling. 77-78Shifting r o d s

.assembling 77-78removing 29

Shimming, checking for. 86Sh i m s

differential bearing 72-73illustrated 73

Sh i m s Continued Pagepinion bearing 90-92

illustrated 90Speedometer drive assembly

removing 22Sprocket and hub assemblies

disassembling 42

Steering brake assemblies See soSteering brake sh oe assembly)

assembling 92-95disassembling 47-53

Steering brake bands, adjusting 4Steering brake lever, operation of 6Steering brake shoe assembly

adjusting 95illustrated 2, 93, 94

assembling 67

inspection pate 95replacing in housing 94-95connecting 99disconnecting II

Subfloorremoving 11-12replacing 99

Synchronizer cones cau ses of difficulty inshifting 61

Synchronizer gearsclutch, trouble with 61operation of 5-6

Synchronizersassembling 75disassembling 38-40

illustrated 41iHustrated 40removing 33

Tools See ls o Equipmentgear driving, illustrated 82hook, track connecting, illustrated 104puller, locking arm, illustrated 28puller, pinion gear, il lustrated 26remover, needle bearing 56

illustrated 59special, for:

countershaft, bearing, removingdescribed 33


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I N D E X T O T E X Tge Page

87 7 - 7 88 6 - 8 7

8 37 5

1 7 - 4 2

. . . . . . . 2 9

. . . . . . . 29

. . . . . . . 2 8' . . . . . . . 3 3. . . . . 4 0 - 4 2. 3 5 3 7 4

. . . . . . . 2 6; 2 7

. . . . . . . 1 9

. . . . . . . 2 3. . . . . 2 2 - 2 6. . . . . 1 9 - 2 2. . . . 2 0 2 1

. . . . . 1 2 - 4 0. . . . . . . 44: . . . . . . 29. . . . . . . 3. . . . . . . 2 9. . . . . 2 9 - 3 2. . . . . . . 3 1. . . . . . 2 9. . . . . 3 2 - 3 8. . . . 3 4 3 6. . . . . . 2 9

tm 9-1750 power train unit, three-piece differential case, for medium tanks, m3, m4, and...

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