TM  10-3930-643-34 GENERAL  SUPPORT  ENGINE,  FUEL,  EXHAUST  AND  COOLING  MAINTENANCE.  (cont) 13-6. Rear Oil Seal. (Sheet 3 of 6) CLEANING/INSPECTION Dry  cleaning  solvent  P-D-680,  used for cleaning parts, is toxic and flammable. Use  only  in  well ventilated  areas. Wear  protective goggles and gloves. Do not smoke or allow open flames or sparks in areas where cleaning solvent is used or stored. Avoid  contact with eyes, skin or clothing. If contact with eyes is made, flush with cold water and seek medical attention  immediately. If contact with  skin  or  clothing is made, flush with cold water. If you become  dizzy  while  using  cleaning solvent, get fresh air immediately. Compressed air used for cleaning purposes will not exceed 30 psi. Use only with effective chip guarding and personal protective equipment  (goggles/shield,  gloves, etc.). 3. Clean  rear  of crankshaft and surrounding  area  with  cloth  moistened with  cleaning  solvent  P-D-680. Dry thoroughly  with  compressed  air. Refer to paragraph 2-8. 4. Inspect for burrs or foreign material in rear of crankshaft. 5. Inspect all other parts. Refer to paragraph 2-9. Go to sheet 4 13-40

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