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copy or use
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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.^.
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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
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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
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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.
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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
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TM
9-
176
5A
FRO
NT
XLE
DD
RA
PD
55800
Fig
ure
F
ron
t
xl
e
a
nd
Dif
fere
ntia
l
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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
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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
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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
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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
)).
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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
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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
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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
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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
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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
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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
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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
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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
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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
8/10/2019 TM 9-1765A BOMB SERVICE TRUCK M6
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
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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
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8/10/2019 TM 9-1765A BOMB SERVICE TRUCK M6
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
8/10/2019 TM 9-1765A BOMB SERVICE TRUCK M6
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
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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
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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
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TM 9-1765A
16-17
ORDNANCE
MAINTENANCE-AXLES, PROPELLER
SHAFTS
AND
WHEELS FOR
B O M B
SERVICE TRUCK M6 CHEVROLET)
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
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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
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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.
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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.
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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.
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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.
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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.
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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
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TM 9-1765A
23
ORDNANCE
MAINTENANCE-AXLES, PROPELLER SHAFTS AND
WHEELS FOR
BOMB
SERVICE TRUCK M6 CHEVROLET)
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.
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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:
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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
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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
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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
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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
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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.
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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
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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
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TM 9-17
65A
2 6
CLEA
NING
INSPEC
TING REPAIRIN
G O
R