TM  10-3930-638-24&P 2-56.  HYDRAULIC  LIFT  SYSTEM  MAINTENANCE  (cont) f. Hoses, Lines and Fittings (cont). (1) Hydraulic Oil Filter Assembly to Control Valve to Mast Assembly (cont) STEP LOCATION ITEM ACTION REMARKS REMOVAL (cont) 10 Engine  compart- a. Tube fitting (74) Loosen  and  dis- Plug end of tube assembly (75) and port ment, front connect on oil filter assembly b.  Tube  assembly  (75) Remove CLEANING 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. 11 All parts Clean Use cleaning solvent P-D-680 INSPECTION 12 Tube assemblies (3, 6, 11, Inspect Replace if cracked, kinked, dented, and 75) twisted,  or  fitting  threads  damaged 13 Connector (4), tees (9, Inspect Replace if cracked, distorted. or threads 17,  and  18),  adapters damaged (12,31, and 44), and elbows (24, 25, 26, 32, 45, and 48) 14 Hose assemblies (29, 30, Inspect Replace if cracked, split, or fitting 42,43,47,51,53,55, threads damaged 57,60, and 68) 15 Clamps  (37,  39,59,66, Inspect Replace if bent or cracked and 73) 16 Restrictor  (49) Inspect Replace  if  cracked,  damaged,  or  threads damaged INSTALLATION/REPLACEMENT NOTE Remove  plugs/caps  from  tube  and  hose  assemblies  and  cylinders as  connections  are  made. 2-424