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TM 10-3930-632-34
CHAPTER 12
REPAIR OF FRONT AXLE
Section I. GENERAL DESCRIPTION
housing.  Transmission pinion-to-differential ring gar
12-1.
General
engagement is adjusted by varying the shims between
The front axle adapter mounts directly on the
the differential carriers and axle adapter and between the
transmission housing.  The axle adapter houses and
axle adapter and transmission housing.
mounts the differential assembly. The differential case
rides in tapered roller bearings in the axle adapter
Section II. DRIVE AXLE ENDS
cleaning solvent P-D-680.
12-2.
Removal and Disassembly
d.
Inspect the spindle for cracks, worn or
a.
Remove the wheel bearings and hubs (TM 10-
damaged threads, scoring or burring of the bearing
3930-632-12).
seats, and other damage. Remove any light burrs or
b.
Disconnect the brake lines from the fittings on
nicks with a fine stone.
the brake assemblies.
e.
Inspect the ring gear and pinion shaft for
c.
Remove and disassemble the axle end as
cracked or broken gear teeth. Inspect the splines of the
shown in figure 12-1.
pinion shaft for damage or wear.  Make sure the
d.
If  the  brake  assembly  is  damaged,
retaining ring grooves are free of nicks and burrs.
disassemble (Figure 11-6).
f.
Inspect  the  spindle  support  for  cracks,
damaged seal and bearing seats, worn or damaged
WARNING
threads, distortion, and other damage. Make sure the
'vent in the spindle support is open.
Replace if
Dry cleaning solvent P-D-680 is toxic and
necessary.
flammable. Wear protective goggles and gloves
g.
Inspect the brake drum for cracks, checking
and use only in a well ventilated area.  Avoid
and scoring of the braking surface, signs of over-heating,
contact with skin, eyes, and clothes and don't
and other damage.
breathe vapors. Do not use near open flame or
excessive heat.  The flash point is 100F -
h.
Replace parts that are damaged beyond
repair.
138F. (38C - 59C). If you become dizzy while
using cleaning solvent, get fresh air immediately
12-4.
Reassembly and Installation
and get medical aid.  If contact with eyes is
a.
Reassemble the axle end as shown in figure
made, wash your eyes with water and get
12-1.
medical aid immediately.
b.
Torque the brake assembly-to-spindle support
capscrews to 52-57 foot-pounds.
12-3.
Cleaning and Inspection
c.
Torque the spindle-to-spindle support bolts to
a.
Discard and replace the seals.
115-127 foot-pounds.
b.
Clean the ball bearing by flushing it up and
d.
Pack the ring gear and pinion shaft bearing
down in dry cleaning solvent P-D-680.  Use a soft-
with the lubricant recommended in the lubrication chart.
bristled brush to remove hardened lubricant. Blow dry
Total amount of grease used to pack the hub, bearings,
with compressed air, taking care not to spin the bearing.
ring gear, and pinion shall be about one.  pound per
Dip the bearing in light oil and wrap it in lint-free paper
wheel.
until it is ready for use.
e.
Before installing the ring gear and hub, make
sure the vent on the spindle support is not blocked.
NOTE
f.
Install the wheel bearings and hubs (TM 10-
3930-632-12).
If either a bearing cone or bearing cup is
g.
Bleed the brake system (TM 10-3930-632-12).
damaged, replace both parts of the bearing set.
Do not replace parts singly.
c.
Scrape or wipe all old grease from the ring
gear and pinion.  Clean all metallic parts with dry
Change 1 12-1

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