TM  10-3930-638-24&P 4-5. AXLE MAINTENANCE (cont) b. Differential Case and Gear Assembly (cont). STEP LOCATION ITEM ACTION REMARKS CLEANING Clean Inspect WARNING Dry cleaning solvent (P-D-680), used to clean parts is toxic and flammable. Wear protective goggles and gloves and use only in a well ventilated area. Avoid contact with skin, eyes, and clothes and don’t breathe vapors. Do not use near open flame or exces- sive heat and don’t smoke when using it. Failure to do so could cause serious injury. If you become dizzy while using cleaning solvent, get fresh air immediately, and get medical attention. If contact with skin or clothes is made, flush with large amounts of water. If contact with eyes is made, wash eyes with water immedi- ately,  and  obtain  medical  aid  immediately. 4 Bearings (17 and Clean Use cleaning solvent P-D-680; soak in clean- 18) ing solvent then remove and strike flat of bearing against block of wood to dislodge  solidified  lubricant  particles. Dry  with  clean,  soft,  lintless  absorbent cloths. Don’t use compressed air to dry bearings 5 All other parts Use cleaning solvent P-D-680. Dry with clean cloths 6 Ring gear (16), side Inspect for wear, damage, cracks, pits and gear (6 and 10), scoring.  Inspect  gear  teeth  for  wear, and pinion gears (8) cracks and damage. If any of these con- ditions  are  observed  replace  part NOTE Ring gear (16) and pinion shaft (paragraph 4-5a, key number 19) shall be replaced as a matched set. Pinion gear (8) and side gear (6 and 10) shall be replaced as a set. 7 Case halves (3 and 4), Inspect Inspect for wear, cracks, pits, scoring, spider  (9),  and  thrust damage and distortion. If any of these washers (5, 7, and 11) conditions  are  observed,  replace  part NOTE Replace thrust washers (5 and 11) and thrust washer (7) in sets; combination of old and new thrust washers will result in premature failure. 4-249