TM  10-3930-643-34 HYDRAULIC  SYSTEM  TROUBLESHOOTING  AND  MAINTENANCE.  (cont) 12-12. Lift Cylinder. (Sheet 6 of 10) CLEANING/INSPECTION l TOXIC/FLAMMABLE 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. l COMPRESSED AIR HAZARD 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.). 32. 33. 34. Clean all parts with cleaning solvent P-D-680. Dry thoroughly with compressed air. Refer to paragraph 2-8. Inspect piston (35) and retainer (44), rod (45) and cylinder (48) for burrs,    scratches or other damage. A small stone may be used to remove burrs or small scratches. Replace parts showing damage or excessive wear. Inspect all other parts. Refer to paragraph Go to sheet 7 12-106 2-9.