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Page Title: CLEANING AND INSPECTION
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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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