TM 10-3930-659-34 5-17. DIFFERENTIAL ASSEMBLY MAINTENANCE (Con’t). 16. Remove ten screws (46), washers (45), and ring gear (29) from housing (28). 17. Remove four screws (38) and cover (41) from housing (28). c. CLEANING AND INSPECTION 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-590C). 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. 1. Clean metal parts with dry cleaning solvent and dry with a clean rag. 2. Clean and inspect bearings in accordance with TM 9-214. NOTE Pinion shaft and ring gear are a matched set. If ring gear is damaged, pinion shaft MUST also be replaced (see paragraph 5-15 or 5-16). 3. Inspect ring gear for burrs, chips, and missing teeth. Replace damaged ring gear and pinion shaft. 4. Inspect bevel gears and pinions for burrs, chips, and missing teeth. Replace damaged bevel gears orpinions. 5. Inspect shaft for cracks, bends, and distortion. Replace damaged shaft. 6. Inspect thrustwashers for distortion and excessive wear. Replace damaged thrustwashers. 7. Inspect housing and cover for cracks, dents, and damage. Replace damaged housing or cover. d. ASSEMBLY 1. Apply  sealing  compound  (Item  15,  Appendix  B) to threads of ten screws (46). 2. Heat  ring  gear  (29)  to  a  maximum  of   300°F (149°C) in accordance with TM 9-214. 3. Install  ring  gear  (29)  on  housing  (28)  with  ten washers (45) and screws (46). Tighten screws in a crisscross pattern, repeating tightening pattern three  times.  Torque  screws  to  110  lb.-ft.  (149 N•m). 5-169