REPAIR OF FRONT AXLE
Section I. GENERAL DESCRIPTION
housing. Transmission pinion-to-differential ring gar
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.
Removal and Disassembly
Inspect the spindle for cracks, worn or
Remove the wheel bearings and hubs (TM 10-
damaged threads, scoring or burring of the bearing
seats, and other damage. Remove any light burrs or
Disconnect the brake lines from the fittings on
nicks with a fine stone.
the brake assemblies.
Inspect the ring gear and pinion shaft for
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
If the brake assembly is damaged,
retaining ring grooves are free of nicks and burrs.
disassemble (Figure 11-6).
Inspect the spindle support for cracks,
damaged seal and bearing seats, worn or damaged
threads, distortion, and other damage. Make sure the
'vent in the spindle support is open.
Dry cleaning solvent P-D-680 is toxic and
flammable. Wear protective goggles and gloves
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 100°F -
Replace parts that are damaged beyond
138°F. (38°C - 59°C). If you become dizzy while
using cleaning solvent, get fresh air immediately
Reassembly and Installation
and get medical aid. If contact with eyes is
Reassemble the axle end as shown in figure
made, wash your eyes with water and get
medical aid immediately.
Torque the brake assembly-to-spindle support
capscrews to 52-57 foot-pounds.
Cleaning and Inspection
Torque the spindle-to-spindle support bolts to
Discard and replace the seals.
Clean the ball bearing by flushing it up and
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
until it is ready for use.
Before installing the ring gear and hub, make
sure the vent on the spindle support is not blocked.
Install the wheel bearings and hubs (TM 10-
If either a bearing cone or bearing cup is
Bleed the brake system (TM 10-3930-632-12).
damaged, replace both parts of the bearing set.
Do not replace parts singly.
Scrape or wipe all old grease from the ring
gear and pinion. Clean all metallic parts with dry
Change 1 12-1