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(061)'
PART 4-1-GENERAL AXLE SERVICE
4-5
THRUST WASHER~
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SIDE GEAR
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SIDE GEAR
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PINION )HAFT
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BRACKET
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CUP
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BEARINGrrREAR CONE AND ROUER ASSEMBLY
REAR BEARING CUP
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SHAFT AND BEARING
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SLINGER
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FRONT CONE AND ROLLER ASSEMBLY
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BOLT
FIG.
6-Rear Axle Disassembled
vent, and dry them \\iith compressed
air. Inspect the parts for defects.
Clean the inside of the carrier before
rebuilding it. When a scored gear
set is replaced, the axle housing
should be washed thoroughly and
steam cleaned. This should be done
only after the axle shafts, wheel
bearings, and seals arc removed from
the housing. Inspect individual parts
as outlined beiow.
GEARS
Examine the pinion and ring gear
teeth for scoring or excessive wear.
The pattern taken before disassembly
should be helpful in judging if gc.1rs
can he re-used. \Vorn gears cannot
be rebuilt to correct a noisy concli-
tion. Gear scoring is the result
0f
excessive loading or the usc of in-
correct lubricant. Scored gears can-
not be re-used.
Examine the teeth and thrust sur-
faces of the differential gears. Wear
of splines, thrust surfaces. o.Jr thrust
washers can contribute tn cxces-;ivt'
drive line backlash.
BEARING CUPS AND CONE
AND ROLLER ASSEMBLIES
Check the hearing cups for nngs,
scores, galling, or excessively worn
wear patterns. Pinion cups must he
solidly seated. Check by attempting
to insert a 0.00 15-inch feeler he-
tween these cups and the bottoms of
their bores.
When operated in the cups, cone
and roller assemblies must turn witth-
out roughness. Examine the roller
ends for wear. Stepwear on the roller
ends indicates the hearings were not
preloaded properly or the rollers
were slightly misaligned.
If inspection reveals either a de-
fective cup or a defective cone and
rol ier assembly both parts should be
replaced to avoid early failure.
lJ-.JOINT FLANGE
He sure that the ears of the flange
have not heen damaged in removing
the drive shaft or in removing the
flange from the axle. The end of the
flange that contacts the oil slinger as
well as the flat surface of the pinion
nut counterhore must he smooth.
Polish these surfaces
if
necessary.
Roughness aggravates backlash
noises,
and
causes wear of the
slinger and pinion nut with a result-
<~nt
loss in pinion hearing preload.
CARRIER HOUSING
Make sure· that the differential
GASKET
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"U" JOINT FLANGE
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PINION SHAFT NUT
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bearing bores are smooth and that
the threaded holes are not damaged.
Remove any nicks or burrs from the
mating surfaces of the carrier hous-
ing.
DIFFERENTIAL CASE
Make sure that the hubs where
the bearings
mount
are smooth.
Carefully examine the differential
case bearing shoulders, which may
have been damaged when the bear-
ings were removed. The bearing as-
semblies will fail if they do not seat
firmly against the shoulders. Check
the fit (free rotation) of the differ-
ential side gears in their counter-
hores.
DIRECTED POWER
DIF'FERENTIAL
Inspect all parts, particularly the
spring plates and discs, the clutch
plates and discs, the plate surfaces
of the case halves, and the side gear
rings for excessive wear or scoring
(Part 4-2, Fig. 23). Replace any
parts that arc worn or damaged.
If one or more of the plates or
discs in a clutch pack on one of
the sides need replacing, the entire
stack of plates and discs on
th~t
side should be replaced.
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