TM 9-1765A BOMB SERVICE TRUCK M6

8/10/2019 TM 9-1765A BOMB SERVICE TRUCK M6

1/128

copy or use

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to folio .

T M

9 1765A

WAR DEPARTME

NT

T E C H N I C A L

M AN U A L

ORDNANCE MAINTE

NANCE

A X

L E S ,

P R O P

t L R S H A F T S A N D

W H E E L S

F O R

B O M B

S E R V I C E

T R U C K M 6 C H E V R

O L E T )

DE

CEMBER

15

942

M

I C R O F I C H E

V I L

B L E

Filed

y

:thOrd. S e r v Co.i^iLi.^.


2/128

TM 9-1765A

T E C H N I C

L MANUAL

No .

9 -1765A

WAR

D E P

R T M E N T

W ashington ,

Dec emb er 15 1942

O R D

N N C E M I N T

E N N C E

A X L E S ,

P R O P E L L E R

S H A F T S

AND

W H E E L S

F O R

B O

M B

S E R

V I C E

T R U

C K M6 C H E V

R O L E T )

Prepared under

the

dir

ection

of

the Ch

ief o

f

Ordnanc

e

with the cooperation

of the Chevrolet Motor Di

vision General

Motors

Corpo

ration

C

ONTENTS

CHAPTER

1: In

troduction

Paragra

ph s

1 3

CHAPTER

SECTION

I:

III

IV:

V:

V

I:

VII:

VIII:

IX:

CHAP

TER 3:

S

ECTION I:

II:

III:

IV

:

V

:

VI:

VII:

VIII:

IX:

Front

axle

re

pair op

erations

4 30

Front a

xle

47

Tr

ouble shooting

9

Fr

ont axle repairs

that can

be

per

formed withou

t removi

ng unit

from

v

ehicle

10 19

Rem

oval

of

front

axle from

ve

hicle 20 21

Disassembly

of

fron

taxle

22 23

Cleaning

inspecting repair

ing or

replacing of

front

axle

co

mponent

parts

24 26

Assembling

front

axle

7 28

Insta

llation

of

front

axle

a

ssembly

in

vehicle

Fron

t axle

fi ts

a

nd

tolerances

.

Rear axle repair

operations

...

Rear axle

Rea

r axle

troubl

e

shooting

Re

ar

a

xle

repairs

that can be per

formed without

removing

unit

from

vehicle

6 3

9

Rem

oval

of

reara

xle from

vehicle. 40 41

Disasse

mbly

of

rea

r axle

42 43

Cleanin

g inspecting repa

iring or

replac

ingof

rear axle componen

t

p

arts

4

46

Assembli

ng

rear

axle

47 48

Installatio

n

of re

ar axleasse

mbly

in

vehicl

e 49

Rear

axle

fits

andtole

rances 5

Pages

4 57

4

8

9 10

11 29

303

2

3334

35 47

48 51

29

30

31

50

31

34

35

52 55

56 57

58 9

5

8 60

61

75 8

6

87 92


3/128

TM

9-1765A

ORDNANCE

MAINTENANCE-AXLES PROPELLER SHAFTS AND

WHEELS

FOR BOMB SERVICE

TRUCK

M6

CHEVROLET)

CHAPTER 4:

SECTION I:

II:

III:

IV:

V:

VI:

VII:

CHAPTER

5:

SECT ION I:

II:

III:

IV:

V:

V ;.

-CHAPTER 6:

Paragraphs

Propeller

shafts

and universal

joints

51-66

Introduction

..................

51 55

Trouble shooting

56

Removal of propeller shafts and

universal joints

.............. 57 58

Disassembly of

universal joints.

59-60

Cleaning and inspection of

propel

ler

shafts and universal

joints. 61 62

Reassembly of universal

joints

63 64

Installation

of

propeller shafts and

universal

joints

..............

65 66

Wheels, wheel bearings,

tires

....

67-79

Introduction .................. 67-70

Trouble shooting

Wheels

Wheel bearings

Tires ..........

7

72 73

74 77

78 79

80-81

Pages

95-107

95-

98

99

100-101

102-103

104

105-106

107

108-121

108-109

110

111-112

113-119

120-121

122

INDEX

123-126


4/128

TM 9 1765A

1-3

Chapter

INTRODUCTION

Paragraph

Scope

Arrangement of

manual

Importance of good repairs

3

1

S COPE

a.

This manual is published

for

the

information

of

ordnance main

tenance

personnel.

It

contains detailed instructions

for

inspection dis

assembly, assembly,

maintenance and repair

of

the Bomb Service

Truck

M6

Chevrolet),

supplementa

ry to

those

in the.

field

and technic

al

manuals prepared for the using arm s

Ad

ditional.descriptive matte

r

and

illustrations

are

include

d to aid

in

providing

a complete working knowl

ed

ge

of

th

e materiel.

2 A R R A N G E M E N T O

F M A N UA L

a.

Thechapters

of

this manual

cover

the

maintenance operations

of

the following main assemblies

: front axle

rear axle propeller shafts

a

nd

universal

joints,

wheels wheel bearings tires. Each

chapter is broken

into

sections

whic

h cover th

e

removal

of the assembly, disassembly,

in

spection, repairing

and

reassembling

of the

main

assembly. The

s

ection

inde

x covers the paragrap

hs of

the various

operations within the section.

3 IMPORTANC E OF

G O O D REPAIRS

a.

It

is

important

that

the mechanic repairing the

vehicle

use

every

precautionary

measure possible to make sure

that the repairs he is per

forming a're

of

a high

quality.

T

his

is

important

when

dealing with

army

units, as much confusion

and delay

c

an result from break-do

wns

on

the road. Success is dependent

upon fresh troops,

ammunition, and sup

plies

arriving

at their

destination

on

time. A

systematic

and

careful check

sho

uld be m

ade

as

the various repairoperations

are

being

performed in

order to prevent

failures o

ccurring again after repairs are pe

rformed.


5/128

TM

9-1765A

4-5

ORDNANCE

MAINTENANCE-AXLES

PROPELLER SHAF

TS ND

WHEELS FOR BOMB

SERVICE TRUCK M6 CHEVROLET)

Chapter

2

FRONT XLE

REPAIR

OPERATION

S

Section I

FRONT

AXLE

Paragraph

Description

4

Data

5

Reference to seconde

chelon

6

Echelon break-dow

n of

maintenance

and repair

7

4

DESCRIPTION

a.

A

differential

carri

er as

sembly is

m

ounted on the inside of

the

banjo

housing in the

same

manner

as in

the

rear axle,

except

that

the

pinion shaft points toward the rear instead

of

the front and the pinion

is

above

the center

line of the housing,

while on

the

rear axle it

is

belo

w

the center

line.

b. The dif

ferential

carrier

assembly in the

front

axle is identically

the same

as the assembly in the rear a

xle and its parts are interchange

able with the carrier

assembly on the rear axle.

c. The

differential housing cover

is

interc

hangeable

with

the one

on

the rear axle.

The

cover

has two filler

plug holes in it

but

it c

an

be

installed only

in

the correct

position.

5

DATA

a Differential

Housing

ty

pe

anjo

Drive.

Through

the springs Hotchkiss)

Drive

type

Hypo

id

Gear

ratio

.67

to

Differential bearing

Hyatt

A-11820-Z

Inner

pinion bearing

Hy

att

U 1306 TAM

Outer

pinion

bearin

g.

New

De

parture H 5310 A

h Wheel

Bearing

Cone and

roller assembly

inner) Timken 33275

Cup

inner) Timken

33472

Cone

and

roller assemb

ly

ou

ter) Timken 399-A

Cup

outer)

Timken 394-A


6/128

TM

9-

176

5A

FRO

NT

XLE

DD

RA

PD

55800

Fig

ure

F

ron

t

xl

e

a

nd

Dif

fere

ntia

l


7/128

TM

9-1

765A

OR

DNANC

E MAIN

TENA

NCE-A

XLES,

PR

O PELL

ER

SH

A FTS

A

ND

W H

EE L S F

O R B O

MB SE

R VICE

TR U

C K M

6 C HE V

R O L E T

)

F

igure 2

Fron

t

Wh

eel Hub and

S

teerin

gKnuc

kle Pa

rts


8/128

TM 9-1765A

5-7

FRONT

AXLE

c.

Trunnion

Knuckle Bearings.

Cone and

roller

assembly.

.......................Timken

41125

Cup

Timken

41286

Shim thickness

..............

0.002

in.

0.005 in.

0.010 in. 0.030

in .

d.

Turning Radius Stop Screw.

Maximum

angle

of innerwheel.............. 8 deg

-|- deg

deg

e.

Steering Geometry.

Front wheel camber............................. s deg to deg

Front wheel caster....................

deg

30 min to 2 deg 0 min

Front wheel

toe in.................................

'in. to

V s in .

Center line of steering arm ball

to

center line of spring 4 /2 in .

Backing plate to center line of

tie rod

bolt............... 19/64

in .

Bottom of

steering

arm

to

top of axle housing in .

f. Universal

Joint.

Number of splines

(each

end) ................................ 0

6 REFEREN E TO

SE OND

E HELON

a.

Many

second

echelon

operations are

often done

by ordnance main

tenance personnel who

should refer

to the TM 9-765 for information.

7. ECHELON BREAK DOWN OF MAINTENANCE AND

REPAIR.

a. Definitions.

(1)

SERVICE .

Consists of

cleaning,

lubricating, tightening bolts and

nuts,

and making external

adjustments

of subasemblies or assemblies

and

controls.

(2) REPAIR . Consists of making repairs to or replacement of such

parts,

subassemblies

or assemblies

that

can

be accomplished

without

completely

disassembling

the

subassembly or

assemblies

and does

not

require heavy

welding

or riveting,

machining, fitting,

and/or

alining.

(3) REPLACE . Consists of removing a part, subassembly or assembly>

.from the vehicle and replacing it

with

a new, reconditioned or rebuilt

part, subassembly

or assembly, whichever

the

case may

be.

(4) REBUILD . Consists of completely reconditioning and placing in

serviceable condition any unserviceable

part,

subassembly or assembly

of motor vehicle including welding, riveting, machining,

fitting,

alining,

assembling and

testing.

b. Allocation

o Maintenance Operations.

Ech e l o n s

2nd, 3rd,

4th

Front axle assembly replace.................... x

Front

axle assembly minor repairs.................. x

Front axle assembly rebuild.......................

x

7


9/128

TM

9-1765A

ORDNANC

E

MA

INTENANCE-AX

LES PROP

E L L E R SHAFTS

AND

W HE

E L S F O R B O MB SERVICE

TRUC K

M6 C H E V R O L E

T)

E

c helons

2nd

3rd 4t

h

Drive fl

angereplace

x

Front

hubreplace

x

Wheel

bearingsadjust

or replace

x

Re

tracting

springsrep

lace

x

Anchor

p

latereplace

:

v x

Brake flange

platereplac

e

x

Brake shoes

replace

x

Brake shoesrelin

e

x

Wheel cylindersr

eplace

x

Wheel

cylindersrepair

x

Steering knuckle

replace

x

Steering knuck

lerepair or rebus

h

x

Axle

shaft

replace

x

Axle

s

haftrepair

x

Trunnion

knuck

le

b

earingsrep

lace.............

..... x

Steerin

g knuckle

support

replace

x

Tie

rod bushing-re

place

x

Outer

end

sealeplace

x

Third mem

berreplace

x

Third member

rebuild

x

Universa

l

joi

ntreplace

x

U

niversal

joint

repair

x

Turnin

g

rad

ius

stop

screwad

just.

x

Casteradjust

x

Camber

adjust

x

Toe-inadjust

x


10/128

TM

9-1765A

8-9

Sec

tion

II

TROUBLE

SHOO

TING

General .......

.

Trouble shootin

g

Paragraph

8 G

ENERAL

a.

In

checking

the

front

axle,

practically

all

troubles can be

located

through a good visual inspectio

n and

a

t

horough road test

of the

v

ehicle.

In

som

e cases it ma

y

be

nec

essary to raise the front

end

of the veh

icle

with a suitable

jack.

This will take the

lo

ad off

the front axle

and make it

easier to inspect

the

wheel

bearings

, tie rod, etc.

In

cases

of misaline-

ment o

f

t

he

front end

, it

will

be necessar

y to check

the caster, cam

ber

and steer

ing

geom

etry with

front end al

inement equipment.

9

TRO

UBLE SHOOTING

a Hard Steering

Probable

Cause

Lack of lubrication.

Steeringgear out

of adjustmen

t.

Improper to

e-in.

Low

tire

pressure.

B

ent

frame.

Incorrect fron

t

end

alinement.

Unevenly

worn

or cup

ped tires.

S

pring leaf

or leaves broken.

Spring

center bo

lt brokenand

spring

shifted on

axle.

Bent

axle

housing.

b Lub

ricant Leaks

Leak

at steering kn

uckle

sup

port.

Leaks

at differential cove

r.

Leak betwe

en third member

and

banjo housing.

Probable

R emedy

Lubricate tie rod

e

nds, ste

ering

gear and

steering connecting

r

od.

Adjus

t stee

ring

gear (

TM 9-765,

par. 1

61).

Adjust toe

-in

at e

nd of tie rod

(par. 29 c (11)).

Inflate tires

to

55

pounds.

Straigh

ten

and aline

frame.

Aline

front end.

Aline fr

ont

end.

Rep

air springs.

Replace sprin

g center bolt

and

line up

spri

ng w

ith axle.

Replace

or straighten axle hous

ing

(par.

29

(12)).

Rep

lace

housing

outer end seal

and gas

ket

(p

ar. 28 b 5))

.

Replace

cover gaske

t (par. 48 b

6)).

Re

place g

asket (par. 28b 2

)).


11/128

TM

9-1765A

9

ORDN

ANCE MA

INTENANCE-AXLES PROPELLE

R

SHAFTS

AND

WHEELS

FOR

BOMB SERVICE TR

UCK

M

6 CHEVROLET)

Shimmy

nd W

andering

Probable

Ca u se

Tie

rod bushings

loose or worn.

Steering knuckl

e

bearings

worn or

out

of adjustment.

I

ncorrect

front

end alinem

ent.

Improper

tire

inflation.

Loose

or worn

wh

eel bearings.

Steering gear

out

of adjustment.

Spring

center

bolt broken

and

sp

ring out of al

inement with

axle.

Bent

axle

housing.

d Differential

Noisy

g

ears or bearings.

Replace

bushings

(par.

17).

Adjus

t

or

replace bearings

(par.

12).

Aline front

end.

Inflate tir

es

to 55 pounds.

Adjust or

replace front wheel

bearings (pars. 75 an

d

76

).

Adjust steering gear(TM

9-765).

Replace

spring

center

bolt

and

aline

spring

with front axle.

Replace or

straighten axle

ho

us

ing (par. 29 c 12 .

Re

place worn

gears

.and/or

bear

ings.

10


12/128

TM 9-

1765A

10-11

Section

III

FRONT AXLE REPAIRS

TH AT CAN B E

PE

RFORMED

WITHOUT

R

EMOVING UNIT

FROM

VEHICLE

Paragraph

In

troduction

10

Diffe

rential

carrier

assembly. ............................

11

Steering knuckle

suppor

t and bearings. ....................

12

Housing

oute

r

end

seal.....

..............................

1

3

Steering arm bushi

ng............................

....... 14

Axle

shaft

15

Axle

shaft

oil

seal..............:.........

^

16

Steering knuckle

17

Stee

ring knuckle

thrust washe

r...........................

18

Tie

rod

..... ..

.............................

............ 19

10

INTRODUCTION

a General Many times repairs

can be

made

to the

front

axl

e with

out

remov

ing the co

mplete

unit from the

vehicle. The followin

g

para

gra

phs

cover these

repairs

to

the various parts

and

subass

emblies of the

front

axle.

b Cleaning and Inspection of

the Component Parts The cleaning,

inspection

and repairing of

the component parts must be done with ex

tr

eme

care

and cleanliness. All

parts must be

cleaned

thoro

ughly.Dry

with clean

rags

and with

pressure

from

an air blow gun.

CAUTION:

Do not

allow

ball bear

ings to

be

spun by

the

air stream,as the air

pres

sure

is liable to imbed small particles

of dirt in the

race and dama

ge

the

be

arings.

As the

parts are disassembled, they

should be putinto

a

cleans

ing

tank

with

SOLVENT,

dry-cleaning,

and

permitted

to

soak.

Do

not

allow rubber

or

leather part

s

to

soak, as

this cleaning solutionwill

deteriorate

the rubber

and

leather. All

leather

and

rubber parts will

be

cleaned with alcohol.

11

DIFFERENTIAL

CARRIER ASSEMBLY

a Equipment

CHISEL

STAND, jack (2), or

suitable

CLAM

P, wheel cylinder, blocks

KM-J718C

WRENC

H,

3

/-in.

HAMM

ER,

1-lb WRENCH,

open-end,

16

-jn.

JACK, 41-J

-73-5 WRENCH,

socket,

6 -in.

PAN, drain

WRENCH, socket,

V8 -in.

PLIERS, brak

e spring, WRENCH, w

heel bearing

nut,

KM

-KMO-142 KM-J1663

PLIERS, large

WRENCH, wheel nut

SCREWDRIVER,

large

11


13/128

TM 9-1

765A

ORDNANCE MAINTENANCE-

AXLES

PROPELLE

R SHAFTS AND

WHEELS FOR B O M B SER

VICE TRUCK M6

CHEVROLET)

b

Remo

val Procedure

(1) L O O S E N

W H E E L S .

WRENCH,

wheel

nut

P

lace

vehicle

on level ground and appl

y

parking brake

. Loosen

the

six pairs of w

heel

stud

nuts on both front

wheels

two

turns.

2) R ISE F R O N T

O F VEHICLE .

JA

CK,41-J-73-5

STAND, ja

ck

(2

),

or suitable

. blocks

Raise front of vehicle u

ntil the wheels clear

the ground

a

nd support

axle

housing

on

jack stands

or

suitable

blocks.

(3)

R E M O V E W H E E L S .

WRENCH, wheel nut

Removethesix pairs of

wheel

stud

nuts th

at were

previously loo

sened

on

each

side and remove th

e wheels.

(4) R E M O V E D R I V E

F L A N G E .

CHISEL

WRENCH,

3

/

-in.

HAMMER, 1-lb

Bend tangs

awayfrom bolt

heads and

remove

the eight bolts

and

locks

on

each side.

Install two boltsin the tapped

holes of flange, screw

them in

alternately,

an

d the flanges

will come out.

(5)

R E M O V E H U B (fig.3).

PLIERS,

large WRENCH,

wheel bearing nut,

KM-J1663

Raise

the

tangs

which lock the outer

be

aring

lock

nut and

remove the

nut, using bearing nut

wrench.

Then

remov

e

the inner'lock nut, spacer

washer,

outer bearing cone

and

roller assembly, and pull o

ff wheel hub.

(6) INST

A L L W H E E L

C Y

LINDER

C L A M P (fig. 4).

CLAMP,

wheel cylinder, KM

-J718C

Install wheel cylinder clamp to keep th

e wheel

c

ylinder pistons

in

placeand

prevent leakage of brake

fluid

.

(7)

R E M O V E

R E T R A C T I N

G SPR ING .

PLIERS, brake spring, KM-KMO-142

Remove

the

brake

shoe

r

etracting spring

.

(8) R E

M O V E

A N C H O R

P L A T E .

WRENCH,socket, s/

-in.

Remove

the

six cap

screws that attach the brake

shoe

anchor

plat

e

to the s

teering

knuckle. Rem

ove the anchor

plate.

12


14/128

TM 9-17

65A

F

RONT

AXLE

REPA IR

S THAT

CAN

B E PERFO

RMED

W

ITHOUT

REMOV

ING U

NIT

FROM

VE

HICLE

W

HEEL BE

ARING

NUT

WRENC

H

RA PD

55802

CLAMP

RA PD

322

14

9)

RE

MOVE

ANCHO

R PLAT

E S P C

E R

WRE

NCH,

socket

,

s

-in.

Rem

ove

the twe

lve cap

sc

rews

thatat

tach the brak

e shoe

anchor

3


15/128

TM

9-1765A

ORDNANCE

MAINTENANCE-AXLE

S PROPEL L E R

SHAFTS

AND

WHEELS FOR BOMB SERVICE

TRUCK

M6

CHE

VROLET)

plate spacer,

inner oil deflector,

brake

backingplate and

steering knuckle

to

the

steering kn

uckle support. Remove

the

spacerand

oil deflector.

10) R E M O V E B A C K I N G PL ATE A N D

STEERING K N U C K L E (fig.

2).

Slide the brake

bac

king plate

off

the steering

knuckle

and

support it

with

a

pi

ece

of

wire.

This pro

cedure

saves

remov

ing

the

brake line hose

and bleed

ing

the bra

kes after performin

g the repairs.

T

he steering

knuckle c

an

then be

removed from its support.

11) REM OV E AX LE S H AF T

(fig. 5).

Pull th

e axle

shaft from

the housing, supporting

it throughout its full

length, to

prevent

damaging

the

oil

seal

in

the end

of

the

housing.

12) SPL I T

PROPELLER S H AF T UNIVERSAL JOINT.

WRENCH,

sock

et,

9/16-in.

R

emove nuts and lock

washers

from

the two U-bolts and rem

ove

U -

bo

lts. Tape the two tru

nnion bearings in place

to

prevent them

from

falling .off

the

trunnion yoke. Slide the

universal joint back on

its

slip

joint and

lowe

r

the end

of

t

he propeller shaft to the

floor.

(13)

R E M O V E DI F F E R E N T I AL

C A R R I E R

ASSEM

BLY.

P A N ,

drain W R E N C H ,

%-in.

B R A K E

B A C K

I N G P L A T E

AXLE SHAFT

Figure 5 Front A

xle

Shaft Removal

14

RA PD 558

03


16/128

9-1765

A

FRONT

AXLE R E P

A IR S THAT CAN

B E

PERFORME

D WITHOUT

REMOVING UNIT

F

ROM

VEHICLE

Place

a

pa

n under the

axle

assembly and loosen

the 10

cap screws

that

attach

the

axle housing

cover to the hou

sing and let lubricant

drain.

Then

remove

the

10

cap

screws

and

the

cover.

Remove

the

10

cap

screws

tha

t attach

the

differential

carrier assembly

and

remove

the

as

sembly from a

xle

hou

sing.

Disassemble

differ

ential carrier

assembly, as

instructed in

parag

raph 43.

Inspe

ct and

repair

differential car

rier assembly

, as inst

ructed in

p

aragraph 45.

Assemble

dif

ferential

carrier

assembly,

as

instructed

in

paragraphs

47

and

48.

Pla

ce differ

ential carrier

assembly

in h

ousing, usinga

new gasket.

Se

cure

with

10 capscrews an

d

lock

washers. Ins

tall housin

g

cover, u

sing

a

new

gasket. Sec

ure

with

10

cap screws

and

lock

washers. Connect univ

ersal joint. Install

axle

shafts,

stee

ring knuckle, brake

backing plate, oil

deflector, anchor plate

spac

er,

anchor

plate, hub as

sembly

and

drive flange by

revers

ing steps in

par

a

graph 11

b.

To

replace

the

steeri

ng

knuckle

support and bear

-

ings

,

it is nece

ssary

to remove the comp

onent p

arts,

as

instructed in

paragraph 11

b,

(1)

through (11).

After re

moving

the

axl

e shaft, pro

ceed as

follow

s:

(1) R E M O V E R

E T A IN E R P L A T

ES, FELT

A N D S E A L S (A, fig. 6).

WRE

NCH, i/ -in.

Re

move the 12

cap scre

ws

(A)

which att

ach

inner

retainer

to

the

rear of the

steering knu

ckle support a

nd remov

e

the

retainer, felt, rub

ber outer e

nd seal and the outer

end seal retainer. N

OTE: It is nec

es

sary

to

re

move

the

stee

ring knuckle

supp

ort

to

rep

lace the spring-lo

aded,

seal.

(2) R E M O V E T R U N N I

O N S B, fig.

6).

W

RENCH, y -in.

Remove the

four

nuts

(B)

from

the

front

axle

trunnions

(top

and

bot

t

om). Remove the trunn

ions

and

shims

. The

n remove the

steering

knuckl

e

sup

port and

bearings from the

axle end.

The spring-loaded

oil

seal

may

now

be

remo

ved by

sliding it over the

axle end.

(3)

INSPE

CTION.

PAN, washing

Wash

all part

s in

S

OLVENT, dry

-cleaning.

I

nspect the

bearings and

races for

cracks or chips.

Any damage

d

bearin

gs

should be replace

d.

15


17/128

TM 9-1765A

12

ORDNANC

E M

AINTENAN

CE-AXLES

PROPE

LLER SHA F

TS AND

WH

EELS

FO

R BOM

B SERVICE

TRU

CK

M6

C

HEVROLET)

R

A PD

32195

Fi

gure 6

Outer End Seal Con

struction

Inspect

th

e spheri

cal ball on

axle end for scores;

any scratch

es on

the

ball should

.b

e sm

oothed

u

p wit

h

san

dpaper.

(4)

R E M O V E

B E A R I N G

C U P S

(fig.

7).

DRIVER

,

bea

ring c

up,

HAMMER

, 1-lb

K

M-J1660-2

Drive

out th

e

upper

bearing

cupand

oil retain

er, usingbeari

ng cup

driver

KM-J

1660-2,

thro

ugh th

e

l

ower bearing

cu

p. After

the upper

bear

ing cu

p and oil r

etainer ha

ve be

en

rem

oved, the

lower

b

earing cup

may

be

dr

iven ou

t from

the top, using

the same d

river.

(5)

IN S TA L

L R E T A I N E R S

A N D

C

U P S

(fig. 8).

DRIVER,

bearing cup,

HAMMER,

1-lb.

KM-J

1660-2

Install

a new

oil retaine

r in the ax

le

end

(t

op

side),

th

en install the

bearin

g

c

up, usi

ng

b

earing cup

drive

r KM-J166

0-2. Install

the bearing

cup in

the

lower sideof

th

e axleend

, using the s

ame

special

too

l.

(6)

I N S T A L

L

S P R I N G - L O

A D E D S E A L

. Install

spring-

loaded seal

over

e

nd of

axle

hou

sing.

16


18/128

TM

9-1765A

FRONT AXLE REPAIRS

THAT

CAN B E PERFORMED WITHOUT

REMOVING

UNIT FROM VEHICLE

RA PD 55804

Figure 7

Removing Steering Knuckle Bearing Cup

(7) I N S T A L L T R U N N I O N S .

WRENCH,

/

-in.

Hand

pack

bearings with GREASE, general purpose, N o . 2. Install

the roller bearings

in

the

axle

end and

then

slip

the

steering knuckle

support over

the

axle end.

Install

one each

of the

following

thickness

shims over the studs

for the

front axle trunnions: 0.002-inch, 0.005-inch,

0.010-inch, 0.030-inch. Install the trunnions, lock washers

and

nuts; then

tighten the nuts securely.

(8) S T E E R I N G K N U C K L E A D J U S T M E N T

(fig.

9).

S C A L E ,

KM-J1670

Adjustment

of the

trunnion bearings is

accomplished by adding

or

removing shims

until the

load

necessary to

turn

the steering knuckle

support

is 35

inch

pounds

plus

or

minus

5

inch

pounds after start of

rotation. To

check

this

load, hook

the end of

the checking scale

KM-

J1670

in

the tie rod bolt bushing in the steering

knuckle

support. The

load necessary to keep the steering knuckle support

in

motion at this

point is 4Vi to

6

pounds.

NOTE:

It

is most important that the

same

thickness of

shims

be used between the trunnions and steering knuckle

support top and bottom.

17


19/128

T

M

9

-1

7

65

A

12

OR

D

NA

N

CE

M

AI

NT

EN

A

NC

E

-A

XL

ES

, PR

O

PE

LLE

R

S

HA

FT

S

AN

D

W

H

EE

LS

FO

R B

O

MB

S

E

RV

ICE

T

RU

CK

M

6

CH

EV

RO

L

ET

)

R

A PD

558

05

nstalling

RA

PD

3

219

8

8


20/128

T M

9-

1765A

72-13

FRONT

AXL

E REP

AIRS

THAT CAN

B E

PERFO

RMED WITHOUT

REMOVING UN

IT

FROM

VEHICLE

(9) INSTALL SEALS,

GASKETS A N D R E T A INE R (fig.

10).

SC

REWDRIVER, small

WRENCH, V -in.

Install

the

outer seal inner

retainer,

using

a new gasket. The

diagonal

cut in the

g

asket, which permits slipping

it

over

the axle housing,

should

be placed at

the

to

p. Place the felt and rubber se

al

i

n

the retainer

so that

the taper

of

th

e seal fits the curvature

of

the s

pherical ball on the axle

end.

Place the met

al

retainer over

the spring-loaded se

al and

the

n install

the

lower

half of the

outer end sea

l

inner retainer

plate.

Start

two cap

scre

ws thro

ugh the

retainer

plate to hold

it

in position,

then,

using a sm

all

screwdriver, position the s

pring-loaded seal so that it

fits

uniformly

around the s

pherical

ball.

Install

the

upper h

alf of the outer e

nd

seal

inner

retainer

plate, then install

and tighten

all

of

the

retainer cap

screws.

Lubricate

the axle shaft universal

joint

with

GREASE, general purpose,

No.

1,

then

install the axle shaft.

RA

PD

32199

Figure

1 Installing

Outer

nd

Seal

(10) AS

S E M B L E C O M P O N

E N T PAR TS. Install

the

steering knuckle,

brake

backing plate,

oil de

flector, spacer, anchor plate, wheel

hub, driv

ing flange an

d wheel,

accord

ing to instructions

given inparagraph 28 .

a. T

here

may be times wh

en it would be necessar

y

to re

place the

felt

and

rubber

outerend seal without re

placing the

spring-

loaded

seal. In

1 9


21/128

T

M 9-1765

A

O

RDNANCE MAINTE

NANCE-AX

LES PROPE

LLER

SHAFT

S AND

WHEELS

FOR BOMB

SERVICE TRUCK

M6 CHEVRO

LET)

such

cases

,

it i

s no

t

nec

essary

to remove the

s

teering

knuckle sup

port.

Instructi

ons

c

overing

t

his operatio

nare conta

ined in

p

aragraph 1

2 a

(1)

a

nd 9).

DRIVER

, bu

shing, K

M-J1665 RE

AMER,

KM-KMO-

347

HA

MMER,

1-lb

STAN

D,jack

, or suita

ble block

JACK,

fl

oor

W

RENCH,

5/6 -in.

PLIERS

WRENCH,

wheel

nut

(1) R E M O V EW

H E E L .

JACK

,

floor

W

RENCH, wheel,

nut

STA

ND,jack,

or suitabl

e

block

Ra

ise front of vehicle

, place one

end o

f

axle

on jack sta

nd or

suitable

bloc

k

a

nd then r

emove whee

l.

(2)

D I S C O N N E

C T TIE R O D .

DRIF

T, brass

WRE

NCH, 1%

6

-in.

PL

IERS

Rem

ove

c

otter pin fro

m

tie

rod

bolt a

nd

re

move

bolt

n

ut. Tap out

tie

rodbol

t and pull

tie rod

away from steeri

ng kn

uckle arm.

(3)

R E M O

V E B U

S H I N G (f

ig .

11).

D

RIVER,

bushin

g, KM-J

1665 HAM

MER, 1-lb

The stee

ring

arm bushing

may be remove

d

by

driv

ing ou

t the

w

orn

bus

hing, using

bushing

driver.

(4) I N S T A

LL

B U S H I N G .

DR

IVER,

bushing, K

M-J1665 H

AMMER, 1

-lb

Install

new b

ushing in plac

e,

us

ing

bushing driv

er.

(5

)

R E A

M B U

S H I N G .

REAMER, KM-KMO-347

Ream bushing

to

proper siz

e,

us

ing specia

l b

ushing reamer.

6) C O N

N E C T TIE R O D .

HAMMER

, 1-lb

W

RENCH,

5

/i

6

-

in.

PLIERS

Place

tie rod end o

ver steering

arm and

instal

l tie rod bolt and

nut.

Tigh

ten nut snug

an

d back it off

one-thir

d

to o

ne-half

turn and

install

new

co

tter key.

20


22/128


23/128

9-1765A

1 5

ORDNAN

CE

MA

INTENANC

E-AXLES

P

ROPELLER SH

AFTS AND

WH

EELS FOR

BO

MB SERVICE

TRUC

K M

6

CHEVR

OLET)

3

Q

o

o

4

22


24/128

TM 9-1765A

15

FRONT AXLE REPAIRS

THAT

CAN

B E

PERFORMED

WITHOUT

REMOVING UNIT FROM

VEHICLE

RA PD

32331

Figure 3 Driving Out Retainer Pin

wheel

end of the shaft

on

a block

of

wood

to

cause the center ball pin

to move

into the

drilled

passage in the wheel end of the shaft. Pull the

two halves

of

the joint apart, and, with the

fingers,

turn the center ball

until

the

grooves

in

the ball

line

up

with

one

of

the

races,

then

swing

the joint

to an

angle

to

permit one of the

driving

balls

to

pass through

the groove

in the center

ball. The remaining

three driving

balls and

center ball

will

then drop out.

(2)

C L E ANING .

PAN,

washing

Wash the universal

joint parts thoroughly with

SOLVENT, dry-clean

ing.

(3) I N S P E C T I O N .

MICROMETER

Inspect the parts of the joint

and,

if either of the

yokes

is

found dam

aged or if

any of the four driving

balls

show

scratches, or flat spots,

the

installation of

a new

joint

is recommended. If

the center ball

pin or

center

ball, or any of

the

four driving balls

show

scratches,

grooves,

or

flat

spots,

new parts

should be installed.

23


25/128

TM

9-1765A

15

OR

DNANCE

M

AINTENANCE-A

XLES PROPELLER

SHAFTS A

ND

W

HEELS FOR BOMB S

ERVICE TRU

CK M6 CHEVRO

LET)

(4

) A S S E M B L E

A X L E

S

H A F T U N I V E R S A L

JOINT

figs. 14

and

15).

HAMME

R,

1-lb

PUNCH,

prick

PUNCH,

drift, small

Drop

the center

bal

l pin into

the drilled pass

age in t

he

whee

l end of

the shaft. Place the

differential half

of the shaft in a bench

vise.

NO

TE:

Ground

portion

of

shaft should

b

e above vise

jaws. Install

center ball

32332

Fig

ure

14 Inst

alling Center

Ball Retainer

Pin

32333

Figure

5

Installing Univers

al Join

t Balls

24


26/128

TM

9-1765A

15-16

FRONT AXLE

REP AIRS

THAT CAN B E PERFORMED

WITHOUT

REMOVING UNIT

FROM

VEHICLE

(one with

groove

and

hole drilled

in

i

t)

in

its socket in the

shaft, hole,

and

groove, facing

opera

tor. Place the

wheel

end of

joint on the center

ball.

Then

slip

three

driving

balls

into

the

races.

Turn

center

ball until

the groove in

it

lin

es

upwi

th the

race

for the remaining

ball. T

he joint

should

now

be tipped

to

extreme

angle to slip

the fourth

driving

ball

into th

e

race.

Then straighten up the

wheel

end of

shaft. Reach

in

with

fingersand turn the center ball until

the center ball

pin

drops in

hole

in

ball. Install the retainer

pin and

p

rick-punch both ends

to

securely

lock

it in p

lace. Use anew retain

er

pin if availab

le. This

univ

ersal joint

is de

signed to have a limited amount of end play a

fter being

inst

alled

in

the axle. This end play

is controlled

by

two bronze

thrust

wa

shers, one

in the

end

of the

housing

and the other in th

e

knuckle

support.

(5)

INSTALL

A X L E

SHAFT. Pack the universal joint

with

GREASE,

general

purpose, seasonal

grade. Push the axle

shaft

into

the housing

a

nd rotate

the

shaft slightly until it

slipsinto the splines

in

the

differen

tial s

ide gear.

When install

ing the

axle shaft,

care must

be

take

n not to

damage the axle shaft

oil seal. The universal joint

should be supported

from below while bearing

down

o

n

the endof

the shaft

to enter

it in

the

differen

tial side

gear.

Lubricate the shaft

where it

c

ontacts the bushin

g

and

thrust

wa

sher

in the

steering

knuckle.

Install the

steering knuckle,

using a new gasket;

then

install

the

brake

assembly,

wheel

hub

and

drive flange according

to

instructions in

pa

ragraph

28

b (8) through

(13). CAU

TION:

If

a vehic

le

is

to

be left standing

out of doors for

a

period

of time,

a

coating of

grease should

be applied

to

the e

xposed

portion of the

spherical shell surrounding the universal

joint to

prevent

rusting.

This machined

surface cannot be painte

d

beca

use it move

s

against

the

oi

l seal

when

the

wheels are turned in

steering.

It will be

kept

well

lubricated automatically

when

the vehicle

is

in

operation,

but

if it

becomes

rusty

due to beingstored

in

the open,

the rusty surface

would

rapidly

wear

the oil seal

and allow lubricant to be

lost from the

universal

joint.

To replace the

axle

shaft oil seals,

it

is

necessary to

remove the component

parts as instructed in paragraph 11

h (1) through

(11). A

fter removing the axle

shaft,

proce

ed as follows:

(1)

R E M O V E AXLE S HAFT

O I L

SEAL

(fig.

16).

CHISEL,

cold

PULLER,

oil seal,

KM-J943

HAMMER,

1-lb

Insert

oi

l seal puller throu

gh

the

opening in the end of

housing and

in b

ehind

the

seal. Place a

wedge, such as a cold

chisel,

between the

puller tangs

to

keep the tangs

forced out into place

be

hind the sea

l

a

nd

ta

p

the center of the

puller to remove the oil seal (fig. 16).

25


27/128

TM 9-1765A

16-17

ORDNANCE

MAINTENANCE-AXLES, PROPELLER

SHAFTS

AND

WHEELS FOR

B O M B


RA PD

55808

Figure 16Removing Axle Shaft Oil Seal

(2) IN S T A L L AXL E

SHAFT

O I L

SE A L (fig. 17).

DRIVER, oil seal, KM-J1661 HAMMER,

1-lb

Before a new seal

is

installed, it should

be

soaked in

engine

oil to

make

the leather

pliable

and also to prevent

burning

the leather before

the

regular axle lubricant can reach it.

Place

the

new seal on seal driver

with

the

free end

of

the

leather

toward

the end

of

the

tool

and drive the

seal

in

place

in the

end

of the housing.

Then

install the

oil seal

retainer

with

the open

side of the retainer toward the seal. The retainer should

be

driven in until its

outer surface is flush with

the end of the

housing

bore

(inside

the thrust

washer).

(3) R E A S S E M B L E C O M P O N E N T P A R T S . Install the axle shaft, steering

knuckle, brake backing plate, oil

deflector, spacer,

anchor

plate,

wheel

hub,

driving

flange

and

wheels according to

instructions

given

in para

graph 28

b

(6) through (15).

(fig. 18).

a. To replace the steering knuckle or

bushing,

it is

necessary

to

remove the

component

parts,

as

instructed in

paragraph 11 (1) through

(10).

After

removing the brake backing plate, remove steering

knuckle

from housing.

26


28/128

T

M 9

1765A

17

FR

ONT AXL

E

REPA

IRS

T

HAT

CAN

B E PERFO

RMED

W

ITHO

UT

REM

OVIN

G UNI

T FROM VE

HICLE

R PO

558 9

F

igure I7

fnsta

lling A

xle

Sh

aft

Oil

Seal

R

PD 32

33 6

Fig

ure IS

Cross

Section

of Steer

ing Kn

uckle

27


29/128

TM 9-1765A

1

7-19

ORDNANCE

MAINT

ENANCE-AXLES

PROPELLE

R SHA FTS AND

WHEE L S F

O R BOMB SERVIC

E T RUCK M6

C H E V R O L E T

)

1) R E M O V E

B U S H I N G

HAMMER,

1-lb

REMOVER

and

REPLACER,

PRE

SS

steering k

nuckle bus

hing,

K

M-J1738

P

lace bushin

g

remover

in

position

on

bushing throu

gh

outer

end

of

knuckle and press bush

ing

out

ofknuckl

e.

(2)

INSTAL

L BUSHING. Start

bushing

throu

gh fla

nged end of k

nuckle

and pre

ss

in

until

it

bo

ttoms

against

sho

ulder. It is not

necessary t

o

ream

this bushing.

Place

steerin

g knuckle

in

housing

and

reassemble

brake bac

king plate, o l de

flector, sp

acer,

anchor

plate, w

heel

hub, drivi

ng

fla

nge, and whee

l, according

to

instru

ctions

given

in

para

graph 28

b (7) through (15).

a. When

replacing the steer

ing

knu

ckle thr

ust washer, it is

necessary

to remove the compone

nt parts as

instructed

in

paragraph

11

b

(1)

thro

ugh (10).

(1)

R E M O V

E

TH R

UST W A S H

E R

CHISEL,

co

ld, small

HAM

MER, 1-lb

Remove center

punch marks

withchisel

and pry out

thrust wa

sher.

(2

) INSTAL L

T H R U S T

W A S H ER .

HAMMER,

1-lb

PUN

CH,

center

Place

thrust wa

sher

in

recess and

prick-punc

h

at three equ

al p

oints

arou

nd its

outer ed

ge.

Place

axle

shaft in

housing

an

d

re

as

semble

seals, retainers,

gasket, steering kn

uckle

support,

steering

knuckle, bra

ke

flange

p

late, oil deflector,

spacer, anchor plate, w

heel hub,

driving flange and

wheel

according to instructions

given in paragraph

28

b

(5)

through

(15).

a. Th

e tie

rod

is made w

ith a bend

to

clear

the differenti

al. The right

end is threaded

with a

coarse

thread

to screw into

the right ti

e rod

end

.

The left end isthread

ed with a fine

thread

fo

r making

toe-in adjustmen

t.

A keyway

is milled in t

he rod to

position

i

t

for

clearanc

e.

28


30/128

TM

9 17

65A

9

F

RONT A XL

E REP IRS

THAT CA

N B E PER

FORMED WIT

HOUT

REMOVIN

G UNIT

FRO

M VEHICLE

1) R E M O V E

TIE R O D .

PLIERS

WRENCH,

15

6

-in.

WRENCH

, -i

n.

Remove

cotte

r pin from

each steeri

ng arm bolt and

remove

bolt

nut

and

bolt. Lower tie

rod a

ssembly. Remove

tierod en

d clamp

bolts and

nut and

unscrew e

nds.

2) INST

A L L TIE R O D

A N D A D J U S T

TO E

-IN.

GAG

E to

e-in

a)Wh

en

in

stalling the

tie

rod,

it

sho

uld be screwe

d

into

the

right

tie

rod

end until

there

is a mini

mum

of one-eighth

in

ch clearan

ce between

th

e low

er rib on the

left side

of

t

hediffere

ntial

a

nd

of

the

tie

rod, when

the

wheels

ar

e t

urned for a

full left tur

n. After c

hecking the abov

e

cle

ar

ance, t

he left

tie ro

d

end

should

be adjuste

d

to prov

ide

zero-in

ch

to

on

e-eighth

inch toe-in.

Lock the tie

rod

by

plac

ing

the

circular

lock

in

the keywa

y o

f

the

rod

a

nd inse

rting one o

f the tie r

od end clamp

bolts,

through

it. The

n tighten the

t

wo

tie

rod end clamp bolt

nuts o

n each

en

d. Install tie rod assem

bly

on

s

teering kn

uckle arm

s

by inse

rting b

olts

and

securing with nuts.

The

nuts

should be

pulled

down snug

and then

backed

off

o

ne-third

to one

-half turn and

locked

with

co

tter pi

ns.

b)

Adjust

toe-in as

d

escribed

in

TM

9-76

5. If diffi

culty is exp

eri

en

ced

in securing prop

er toe-i

n,

it ma

y

be

nece

ssary

to

di

sconnect the

tie

rod

from the right s

teering ar

m and sc

rew the end e

ither on or off

the tie rod

one

turn.

Then

screwthe

left

tie

rod end

onor off the

rod

to

sec

ure proper

toe-in. The reaso

n for this

operation

is the fact

that a

coarse

thread is u

sed on the right

side whil

e afine th

readis use

d on the

left

side.

Since

any

change

in

toe-in involves

a

complete

turn

of

the

t

ie

rod

end,

working with th

e

two tie rod ends,

one having

a coa

rse

thr

eadand the o

ther a fin

e

t

hread,

closer toe

-in

ad

justment i

s

obtaina

ble.

29


31/128

9-17

65A

ORDN

ANCE

MAINTENANC

E-AXLES P ROP ELLER

S H A F T S AND

WHEELS FOR

BOMB SE

RVICE

TRUCK

M6

CHEVRO

LET)

Section

IV

REMOVAL OF FRON

T AXLE FROM VEHICLE

Paragraph

Preliminary procedure

20

Removal

of

front

axle

assembly

.......................... 21

a.

In preparing to re

place

the

front

axle

as a unit, it is im

portant

that the

truck be place

d

on a solid f

oundation,

preferably

a

concrete

floor. After raising the

front endof the truck, the frame

should be sup

port

ed

on solid jack s

tands or suitable blocking. The

front

axle

unit

should be s

upported on a floor

jack

while re

moving

i

t from the truck.

This will facilitate easein ha

ndling

the uni

t

while

removing it .

The

equipment needed

for

repair operations

in

this

section is listed

below. Equipment needed for each

operation is listed at

the start of

each paragraph covering the operation.

JACK, floor,

41-J-73-5 WREN

CH,

9/

6

-in.

PLIE

RS WRENCH,

5/

8

-m.

SCREWDRIVER,

large

WRENCH, 15/6 -in.

STA

NDS, jack (2), or suitable

WRENCH, open-end,

7

/6 -in.

blocks

WRENC

H, wheel nut

(1) LOOSEN

W H E E L S .

WRENCH, wheel n

ut.

Loosen

the six pairs of wheel nuts two

turns.

(2)

R A I S E F R O N T O FV E H I C L E .

JACK, floor,

41-J-73-5 STANDS, jack,

(2), or suitable

b

locks

Raise

front of vehicle and

support

fram

e on su

itable

jac

k stands or

blocks. Use floor jack to

support axle

assembly.

(3) SLIT P ROP E LLE R

SHAFT. UNIVERSAL

JO INT .

WRENCH,

9/

6 -in.

Rem

ove the four nu

ts and lock washers f

rom

the two U-bolts and

re

move U-bolts. Ta

pe

the

two trunnion bearings in place to

prevent

them from falling off the tru

nnion yoke. Slidethe universal

joint

bac

k

on its sli

p

joint an

d

low

er the end of the

propeller

shaft

to the floor.

30


32/128

TM 9-1765A

21

REMOVAL

OF

FRON

T AXLE FROM VEHIC

L E

(4) D I S C O N N E C T S T E E R I N G

C O N N E C T I N G R O D

( DRAG

L I N K

).

PLIERS

SCREWDRIVER, large

Remove

cotter

p

in and unscr

ew

end plug.

Then remove

safety

plug,

tension spring

and

ball

seat. Lift steering co

nnecting

ro

d (dra

g link)

off the steeringknuckle arm ba

ll.

(5) D I S C O N N E C T

B R A K EHOSES .

PLIERS

WRENCH, op

en-end, 7/i

6

-in.

Unsc

rew brake pipe to

brake

hose coupling nut, remove

hose from

mounting clip

on each

side.

RA

PD 32216

Fig

ure 19Front Axle A

ssembly

Removal

(6) D I S C O N N E C T S H O C K

ABSO RBER L I N K S

.

WRENCH, s/8-in.

Remove

nut from

bottom of

shock

absorbe

r connecting link and

re

move

link

from bracket

on

each side.

(7

) R E M O V E

F R O N T

S P R I N G

U-BOLT S .

HAM

MER, Mb WREN

CH, 15/6 -in.


33/128

TM

9-1765A

2

ORDNANCE

MAINTENAN

CE-AXLES

PROPELLE

R SHAFTS AND

W HEELS F

OR

B O M B

SERVICE

TRUCK

M6 CHEVROLET)

Remove the

four

nuts from the

two front

spring

U-bolts on ea

ch

side

and remove the

U-bol

ts and bumper

retainer.

8) R M O V I N G

FRONT A XLE

A S S E M B L Y (fig.

19).

BLOCKS

WRENCH,

wheel

nut

Lower

supporting jack

carefully

and roll t

he entire front

axle a

ssem

bly

out

from under car. Block

up

axle,

remove the six

pairs

of wheel

nuts

from

each

w

heel and

remove the wheels.

32


34/128

TM 9-1765A

22-23

S

ection

V

DISASSEMBL

Y

O F FRONT

AXLE

Paragraph

Preliminary

p

rocedure

22

Front axle disassembly

23

a. Before d

isassembling

the

front axle assembly, it

should be cleaned

tho

roughly

so

that it can

be

inspected for

external damage, cr

acks,

etc.

A s the parts are

disassembled, they should be

put

in a

cleansing tank

with solution

so

that

they

can

soak.

This

will

make them easier

to

clean.

Do

not

let rubber or leather

parts

soak in

the cleaning

solution, as

this

will

deteriorate the rubber and le

ather.

(fig. 1).

The

equipment need

ed

for

repair

opera

tions in th

is

section is

listed below. Equipment needed for ea

ch

operation

islisted

at

the

start

of

each paragraph c

overing the operation.

BRUSH,

cleaning

SOLVENT,

dry-cleaning

CHISEL, cold STA

ND, rear

axle

CLAMPS, wheel

cylinder, TANK,

parts

cleaning (larg

e)

KM-J718C (2)

TANK, parts cleaning (small)

CLOT

H, cleaning VIS

E, bench

GUN,

air

blow WREN

CH,

V

-in.

HAMMER, 1-lb W

RENCH,% 6 -in.

HAMMER,

soft

WRE

NCH,

s

/-in.

HANDL

E,

socket,

24-in. WREN

CH, 3/-in.

HANDLE, spee

d socket

W

RENCH, 15/6 -in.

PAN, drain

WRENCH,

socket,

l

s/-in.

PLI

ERS WRENCH, wheel

bearing

nu

t,

PLIERS, brake, spring, KM- KM-J1633

KMO-142

(1) R E M O V E

T I E ROD.

HAMMER, 1-lb

WRENCH, 15

/

6

-in.

PLIERS

R

emove

cotter

pins

from

the bolts

which secure each end of

the ti

e

rod to the steering knuckle arms

and remove the nuts and

tie rod bolts.

Lift off tie rod

assembly.

(2) R E M O V E D R I V E

FLANGES.

CHISE

L, cold

WRENCH, 3/-in

.

HAMMER,

Mb

33


35/128

TM 9-1765A

23

ORDNANCE

MAINTENANCE-AXLES, PROPELLER SHAFTS AND

WHEELS FOR

BOMB


Bend tangs away

from

bolt

heads

and remove the eight bolts and

locks

on each side. Install

two

bolts in the tapped

holes

of flanges,

screw

them

in

alternately

and the

flanges will

come

out.

(3)

R E M O V E H U B S .

CHISEL,

cold WRENCH, wheel

bearing

nut,

HAMMER,

1-lb KM-J1633

Raise

tangs on

bearing

nut

lock and remove lock

nut, lock,

adjusting

nut, washer and outer

bearing

cone and roller assembly

on

each side.

Then pull

off

hub assemblies.

(4)

R E M O V E A X L E SHAFTS.

CLAMP, wheel cylinder, KM- PLIERS, brake

spring,

KM-

J718C (2)

KMO-142

WRENCH, socket, %-in.

Install wheel cylinder clamp and remove brake shoe retracting

spring.

Then

remove the

6

cap screws from the brake anchor plate and remove

anchor plate.

Remove the 12 cap screws from the

anchor plate

spacer

and remove the anchor

plate

spacer,

oil deflector, brake backing

plate,

steering

knuckle and

axle

shaft

on

each

side

of

vehicle.

NOTE:

Slide

the brake

backing

plate

off

the steering knuckle and support it with a

piece

of

wire.

This

saves

removing the brake

hose

and

bleeding

the

brakes

later.

(5)

R E M O V E S TEERI NG K N U C K L E

S U P P O R T .

WRENCH,

1/2-in.

WRENCH, 3/

-in.

Remove

the 12

cap

screws that attach the inner

retainer

to the sup

port

on

each

side

and

remove the

inner retainer,

oil

seal

retainer,

outer

end seal and

outer

end seal retainer. Remove the 4 nuts

from

the

upper

and lower

trunnion

on

each side and remove the

lock

washers, trunnions

and

shims. Reach inside

the

knuckle support

and

remove

the

lower

steering knuckle

trunnion

bearing cone and

roller

assemblies. Slide sup

port

off

end

of

housing and remove the spring-loaded seals.

(6)

R E M O V E

D I F F E R E N T I A L C A R R I E R A S S E M B L Y .

PAN, drain

WRENCH,

%-in.

Set drain pan

under

banjo

housing

and remove the

10 cap

screws that

attach the housing

cover

and remove cover, draining the oil in the pan.

Then remove the 10 cap screws that attach the differential carrier

assembly to the housing and remove the assembly.

(7) D I S A S S E M B L E D I F F E R E N T I A L C A R R I E R A S S E M B L Y .

The disassembling and assembling of the differential carrier assembly

is covered in paragraphs 43, 47 and 48.

34


36/128

TM

9-1765A

Section

VI

CLEANING

INSPECTING REPAIRING OR REPLACING OF

FRONT

AXLE

COMPONENT

P A R T S

Paragraph

Introduction

24

Component parts, inspection a

nd disassembling.

.............. 2 5

Component

parts, repairin

g

and assem

bling. ................

2 6

The

cleaning,

inspection and

repairing

of

front

axle

com

ponent

parts

must

be

done with

ex

treme care and cleanliness.

All

part

s

must be

thoroughly cleaned, both

inside

and outside,

and then dried

with clean cloths and air pressu

re from an air

blow

gun.

CAUTION:

Do not

allow

ball bearings to be spun by the

air stream. Spinning the

bearings

with air pressure

is liabl

e to embed s

mall particles in the race

and damage the

bearings

. Worn and damaged parts

that

ar

e removed

from

subassemblies

sh

ouldbe

placed

to one side to

ke

ep them separated

from

the

parts

that

are

to be used

again.

The

equipment needed to rem

ove and replace

par

ts

from

subassemblies

will

be listed

at the start of ea

ch

paragraph cover

ing

the operation.

The

differential

carrier

asse

mbly

in the

front

axle is

the

same

as

the

carrier

assembly

in the rear axle.

Instructions for cleaning,

inspection and

repairing are the

same a

nd are

given

i

n

paragraph

s 45 and

46

.

(1)

STEERING K N U C K L E T

R UN N ION BEARIN G C U P S .

a) Inspection

In

spect the trunnio

n

bearing

cups

for ridg

es, scores,

cracks or

other

damage. I

f they are

damaged, they should be replaced.

b)

Remove

Steering Knuckle Trunnion

Bearing Cups

(fig.

7).

DRIVER,

bearing cup,

HAMMER, 1-lb

KM-J1660-2

Drive out

th

e

upper

cups and oil retainer from the inside.

Then driveout

the lower

cups

from

the

in

side in the same

manner.

(2)

AXLE

SHAFT OI L

SEAL

a) Inspection Inspect

the

axle

shaft

oil

seals

for

damage

or

wear.

If they

are

damaged

or worn, they

should be

replaced

as follows:

35


37/128

T

M

9-

1765A

25

ORDNANCE MAINTENANCE-AXLES PROPELLER

SHA

FTS

AND

WH

EELS FOR

BOMB

SERVICE TRU

CK M6 CHEVROLET)

b)Remove Axle Shaft

Oil Seals (fig . 16).

CHISEL, cold

PULLER, oil seal, KM-J943

HAMMER,

1-lb

Insert oil s

eal

puller through

the

opening

in

the

endof housin

g

and

in

behind

thes

eal. Place a wedge

, such as a

cold

chisel, between the pulle

r

tangs to keep the

tangs forced out into place behind the

seal and tap

the

center

of

the

puller(fig.

16)

to remove the

oil seal.

(3) T H R U S T W

ASHERS.

a)

Inspec

tion

Inspect

the

thrust

washers for ridges

or excessive

wear

,

and if damaged or

worn,

they

should

be

replaced.

b

)

Remove Thrust

Washers

CHISEL, cold, small

HAMMER

,

1-lb

Remove

center punch marks

wi

th chi

sel and pry out thrust washer.

(4)

AXLE H O U S I N G .

a) Inspection.

Inspect the axle

housing for cracks or other damage

and if damage

d,

it

should be re

placed.

(1)

G

ENERAL. Any damage to the

front axle shafts except

center

ball or

center

ball

pin

nec

essitates

replacing

the

complete sha

ft. Inspect

the ground surfa

ces

on

t

he sh

afts,

the

thrust

washer

contact surfaces,

the splines and the ball

rac

es for

ridges, scores or

ot

her damage, and if

da

maged, replace

the

axleshaft assembly.

(2)

INSPE

CTION.

Inspect

the

balls

for

wear

or

scoring

. If

the

center

ball

is

damaged,

the

ball should

be

replaced.

Damage

to

the

driving

balls

ne

cessitates replacem

ent

of the complete

shaft.

_ (3)

R E M O V E

R E T A INE RP I N .

HAMMER,

1-lb

PUNCH,

drift,

Vs-in.

Drive

out

the

retainer

pin (fig. 13

).

(4) R E L E A S E C E N T E R BALL

PIN.

BLOCK,

wood

Bounce

the

wheel

end

of

the shaft

on

a

block

of

wood

to

cause

the

center ball

pin to move into

th

e drilled passage in the

wheel end of the

shaft.

(5)

R E M O V E

B A

LLS .

CRAYON

VISE,

bench

M

ark the yokes and the

four driving balls as

they

must be assembl

ed

in

exactly

the same relative position.

Set the axle

shaft

in

a

bench

vise

with the wheel end

of

the shaft dow

n. NOTE: Do not clamp

the vise on

36


38/128

TM

9-176

5A

25

CLEANING,

INSPECTING, REPAIRING O R

REPLACING

OF

FR O

NT A X L E COMPONENT

PA RTS

th

e

ground

surface of the

shaft

. Swing the

top h

alfof the shaft t

o one

side and turn

the center ball until

the groove lines up wit

h one of the

driving balls

so

that

the

drivingball

will

pass through

the

groove. Swing

top

half

o

f the shaft f

urther

to per

mit the drive

ball top

ass

throu

gh the

groove and out o

f the joint.

The remaining balls will

then drop out.

1)

TIE

R O D

B O L T B

U SH I N G .

a)

Inspection

Inspect the

bushings for wear

or otherd

amage,

and

if

worn or damaged,

they

should be

replaced.

b)

Remove

Bashing

fig.

11).

DRIVER,

bushing, KM-J1665 HA

MMER, Mb

Drive o

ut bushing

with special driver.

2) S T U D S .

a) In

spect the eigh

t

st

uds oneach support

to see that they a

re not

broken

and

that the

thre

ads

are

n

ot stripped. Damaged

studs should

be

replac

ed.

b)

Remove Stripped Studs

R

EMOVER, stud

WRENCH,

Stillson, 8-in.

Attach

Stillson wrench

or

stud

remover

and unscre

w

stud

from

support.

c

) RemoveB

roken

Studs

BIT, drill, V

4

-in.

HAMMER,

1-lb

DRIL

L, electric, s

mall PUNCH,

center

EASYO

UT

WRENCH

,

to

fit

easyo

ut

Prick-punch

center

of

broken stud

and

drill

hole

deep enough

to

receiv

e easyout. Start easyout an

d turn in

counterclockwi

se

direc

tion

until the broken stud

is removed

fromthe supp

ort.

(1) IN S

PECTION. Inspect the

trunnions

for scored or damaged

sur

faces where they

contact the

bearings. Also inspect

the

ball

on

the

end

of the knu

ckle

arm

for

wear

or damage. Replace

any damaged

trunnions

or

arm.

(1) IN

SPECTION. Inspect th

e bushing and

thrust washer in e

ach

knuck

le

for

w

ear or other

damage. If

worn or damaged, replace

them.

2)

R E M O V E S T E E R I N G

K N U C K L E B U

SH I N G.

HAMMER,

Mb

R

EMOVER and REPLACE

R,

PRESS, bench

steering knuc

kle bushing,

KM-J

1738


39/128

TM

9-1765A

5

ORD

NANCE MAINTENANCE

-AXLES

PROPELLER SH

AFTS AND

W

HEELS FOR B O MB SE

RVICE T

R UC K M6 C H E V

R O L E T)

Place bush

ing

remov

er in position

on bushi

ng through outer

end

of

knuck

le and press

bushing out of kn

uckle.

(3)

R E M O V E T H R U S T

W A S H E R .

CHISEL,

cold,

sm

all HAMM

ER, 1-lb

Remove center

punch

marks with c

hisel and pry out

thrust washe

r.

(1) IN SPE

CTION.

In

spect the brake

backing

pla

te for damage

. If

da

maged,

re

place it.

(2)

R E M O V E

W H E E L

C Y L IN D E R

W

RENCH,

1/2-in.

Remo

ve

the

two

cap screws

that attach

the

whe

el

cylin

der to

the

back

ing

plate

and remove

the

wheel

c

ylinder.

1) G E N

KRAL. t

is

not neces

sary to remove

t

he wheel c

ylinders from

the ba

cking

pla

tes to

inspect or

repa

ir

them. t will be

necessary, how

ever,

to disassemble the

wheel cylind

er to inspect it.

(2) D

ISASSEMB LE W H

E E L C Y LI N D E R

(fig.

20). R

emove wheel cylin

-

der

clamp.

Rem

ove

t

he e

nd covers

with

the adjusting

sc

rews and remov

e

pistons,

ru

bber cups

and spring. Inspect rubb

er cups

for swelling or other

damage. Inspec

t pistons and piston fit in

housing. This

clearance should

be 0.002 inch

to

0.005 inch.

Inspect end

covers an

d

a

djusting screws

for

wear or other dam

age. Replace

any

damaged

parts.

(1)

IN SP

ECTION.

Insp

ect the

brake shoe

a

ttaching

parts for

excessive

looseness or

binding at

the

pivot pins.

If

the

pivot

pins

bind,

lubri

cate

th

em with

a

thin film

of GREA

SE, graphite, light. If

any of

the at

taching

pa

rts

are

w

orn

or

damaged, rep

lace

them

.

(2) R

E M O V E B R A K

E S H O E

A

TTACHING

P AR TS .

PLIERS

SCRE

WDRIVER

Pry

edge

of

the

lower pinlock over

the

pin

and

pull

off

pin

lock.

Then

remove

the

pins and

l

ocks from the brake

shoes

in

the

same

manner.

Pry

off pin spring lock

at center of

link and remove spring

and

sh

oe pin.

(1)

INSPECTIO

N .

Inspect

brake

linings

to

see

that

they

are not oil

soa

ked or worn

d

own to

the

rivet heads. If

lining is oil

soaked, worn or

damaged, it

should be r

eplaced.

38


40/128

T

M

9-

17

65

A

2

5

C

LE

A

NIN

G

,

IN

S

PE

CT

IN

G, R

E

PA

IRI

NG

O

R

R

EP

LA

CI

NG

O

F

F

RO

NT

XL

E

CO

M

PO

NE

N

T

P

AR

TS

Q

0

V

ID

0

39


41/128

TM

9-1765A

25

ORDNANCE MAINTENANCE-AXLES,

PROPELLER SHAFTS AND

WHEELS FOR B O M B SERVICE

TRUCK M6 CHEVROLET)

(2) R E M O V E

L I N I N G .

DELINER,

brake

HAMMER,

1-lb

CHISEL,

cold, small

Punch

out rivets

with deliner

on brake relining

machine

or

cut

them

with a chisel and hammer and remove

lining.

(1) B R A K E D R U M .

a) Inspection.

Inspect

the brake drum

to

see

that

the

lining

contact

surfaces are not scored, worn, tapered or out of round. If the drums are

damaged

in

any way, they should be turned on a lathe or be replaced.

b)

Remove

Drums.

HAMMER, Mb

Drive out

the six

hub bolts.

(2)

W H E E L B E A R I N G S A N D S E A L

a)

Inspection. Inspect hub for external damage or stripped stud

threads. Also

inspect

the wheel bearing cones and

cups

for wear, scoring

or

other

damage. Inspect seal for wear or damage.

Replace

all

damaged

parts. If hub

is

to be replaced, it will be necessary to remove the wheel

bearing parts.

b)

Remove Inner Race Bearing Cups (fig.

21).

PULLER,

inner bearing,

KM-J918G

Install

the

puller

by

tilting

the

plate with the chain attached so

that

it may be slipped through the cone of the bearing and then raised

up

behind the

bearing

cup.

The plate is then held

in this

position by the

chain

while threading the

puller

shaft into the tapped hole. The puller

body

is

then

located

against

the

inner

end

of

the hub

and

the puller

handle installed (fig.

21).

The

cup,

cone and roller assembly, and seal

are removed

by

turning the puller handle

in

a clockwise direction.

c) Remove

Outer

Bearing Cup

HAMMER, Mb PUNCH,

drift,

long

Insert

long drift punch through inside of

hub

and engage it against

the back of the

outer

bearing cup. Drive out cup by tapping punch with

hammer and moving punch to opposite

side after

each

hammer blow.

a)

Inspection. Inspect drive

flange

for wear or other damage, par

ticularly the splines. If damaged, replace it.

a)

Inspection. Inspect

all

bolts and nuts

for

stripped

threads

and

other damage.

Replace all bolts

and

nuts that

are

damaged

and replace

all

broken or

damaged lock

washers.


42/128

TM 9-17

65A

26

CLEANING,

I

NSPECTING,

REPAIRIN

G O R R EPLAC ING

O F

F R O N

T

A XL E

COMPONE

NT

PARTS

I N N E R

EARING

P U L L E R -I9

18-G

R

P D 5581

Figure

2

1Removing

Wheel I

nner

Be

aring and

Oil Seal

a. It is pres

umed that all

unsatisfactory

parts were replaced

and

th

e

new par

ts

of the

subassemblies

are now ready

to

be

assemble

d. It is also

presu

med that all

the parts that are

to be put

in the

assembly

have

be

en

thoroughly

cleaned. Inasmuc

h as cleanliness

is one

of the

m

ost im

portant parts

of satisfactory

work, all parts, both old

and new, s

hould

be

rinsed thoroughly

in clean solution

and dried before

they

are assemble

d.

(1) I N S T A L L

O U T E R B E A R I N

G CU P fig. 22).

DRIVER,

bearing c

up, HA

MMER,

1-lb

KM-J16

60-3

Place the

wide

side

of

the cup

in

position

on

hub and drive

in

cup

until i

t bottoms.

(2)

I NS TA

L L I N N E R B E

A R I N G C U P S .

DRIVER, bearing

cup,

HAMMER,

1-lb

KM-J

1660-3

Place

t

he

wide

s

ide of the

cup in

position on hub

and

driv

e in cup

until

it bottoms

.

41


43/128

T

M

9-1765

A

26

ORDNANC

E MAINTEN

ANCE-AXLES PROPELLE

R SHAFTS AND

W HEELS

FOR B O M

B

SERVICE

TRUCK M

6 CHEVROLET)

O UT E R

B E A R I N G

C U P

DRIVER

KM - J1660 - 3

RA PD

55811

Figure 22Replacin

g Outer

Bearing Cup

O IL

SEAL

D R I V

E R K M - J 1 6 7 2

RA PD 55812

Figure

23Installi

ng Inner

Oil Seal


44/128

TM 9-17

65A

2 6

CLEA

NING

INSPEC

TING REPAIRIN

G O

R

Date post:	02-Jun-2018
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TM 9-1765A BOMB SERVICE TRUCK M6

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