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TM 5-2420-222-34
9-3.
REAR AXLE HOUSING, SHAFTS, SEALS, BEARINGS, AND PLANETARY PINION CARRIER MAINTENANCE
(Con’t).
1.
Clean all metal parts with dry cleaning solvent and rags. Dry thoroughly with clean, dry rags.
2.
Clean and Inspect bearings (see TM 9-214).
3.
Inspect metal parts for cracks, breaks, and abnormal bends.
4.
Inspect rear axle housing and axle shaft for damaged threads.
5.
Inspect rear axle housing, axle shaft, three planetary pinion carrier spur gears, and final drive shaft for scoring, pitting,
chipped, or worn gear teeth.
6.
Inspect axle shaft oil seal for excessive wear, cracks, or signs of leaking. Replace if defective.
d.
REPAIR
Restore rear axle housing (1) or axle shaft (15) threads using screw threading set.
e.
ASSEMBLY
NOTE
Perform steps 1 through 6 only if oil seal cup, bearing cups, and straight pins were
removed from rear axle housing, or roller bearing and oil seal were removed from
axle shaft.
1.
Install three straight pins (44) in face of rear axle housing (1) with plastic-faced hammer.
2.
Install oil seal (37) on axle shaft (15) with plastic-faced hammer.
WARNING
Hot oil gives off highly flammable fumes. When heating parts in oil, do not smoke
or allow open flame nearby. Make sure area is well-ventilated. Heat parts only in
tank with lid which can be closed quickly to extinguish fire. Wear eye protection,
protective gloves and clothing when heating parts in oil and handling hot parts.
Hot oil and hot parts can cause severe burns.
CAUTION
Do not heat roller bearing over 300°F (149 C). If overheated, temper of bearing will
be affected, causing roller bearing failure.
3.
Using oil heating equipment, heat roller bearing (39) in oil. When hot, position roller bearing in place on axle
4.
Install bearing cup (40) in rear axle housing (1) and tap in place with brass drift and ball-peen hammer.
5.
Install oil seal cup (38) in rear axle housing (1) and tap in place with plastic-faced hammer.
6.
Install bearing cup (42) in rear axle housing (1) and tap in place with brass drift and ball-peen hammer.
7.
Install new plain encased seal (41) in rear axle housing (1) and tap in place with brass drift and ball-peen hammer.
8.
Cover axle shaft (15) splines with pressure sensitive tape.
9.
With the aid of an assistant, install axle shaft (15) in rear axle housing (1). Remove pressure sensitive tape.
9-19
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