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TM 5-2420-222-34
8-6.
DIFFERENTIAL DRIVE SHAFT ASSEMBLY MAINTENANCE (Con’t).
NOTE
Record number and thickness of shims and position of parts to ensure proper
Installation.
4.
Remove shims (5), sleeve spacer (6), third and seventh speed gear (16), fourth and eighth speed gear (14),
second and sixth speed gear (11), first and fifth speed gear (7), two shaft collars (9), two shifter collar sleeves (8),
four thrust washer bearings (10, 12, 13, and 15), shims or ring spacers (17), bearing cone (19), and drive shaft
(20) from transmission (21).
5.
Using mechanical gear and bearing puller kit, remove two bearing cups (4 and 18) from transmission (21).
b.
CLEANING AND INSPECTION
1.
Clean and inspect bearings (see TM 9-214).
WARNING
Dry cleaning solvent, P-D-680, is toxic and flammable. Always wear protective
goggles and gloves, and use only in a well-ventilated area. Avoid contact with
skin, eyes, and clothes, and DO NOT breathe vapors. DO NOT use near open flame
or excessive heat. The solvent's flash point Is 100°F-138°F (38°C-590°C). If you
become dizzy while using cleaning solvent, immediately get fresh air and medical
help. If solvent contacts eyes, Immediately wash your eyes and get medical aid.
2.
Clean all other metal parts with dry cleaning solvent. Dry thoroughly with clean, dry rags.
3.
Position bearing cup (4) in place on bearing cone (3). Using vernier caliper, measure assembled width and record
reading. Nominal width should be 1.446 in. (36.728 mm). Remove bearing cup from bearing cone.
NOTE
Differential drive shaft and differential ring gear are a matched set. If drive shaft is
defective, ring gear must also be replaced (see paragraph 8-7).
4.
Inspect drive shaft, four speed gears, two shaft collars, two shifter collar sleeves, and four thrust washer bearings
for cracks, breaks, and damaged teeth or splines. Replace if defective.
5.
Inspect all other metal parts for cracks, breaks, and abnormal bends. Replace if defective.
6.
Inspect drive shaft for damaged threads.
c.
REPAIR
Restore damaged drive shaft (20) threads using screw threading set.
d.
INSTALLATION
1.
Add reading recorded in step 3 of cleaning and inspection to dimension etched on face of bevel pinion gear of
drive shaft (20).
2.
Record dimension etched on top rear of transmission (21). If dimension is not found etched in transmission, use
7.813 in. (198.450 mm).
8-31
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