TM  10-3930-638-24&P 2-56. HYDRALIC LIFY SYSTEM MAINTENANCE (cont) g. Hydraulic Reservoir (cont). (2) Hydraulic Oil Filter Assembly (cont). STEP LOCATION ITEM ACTION REMARKS REMOVAL 1 Engine  compart- ment, front a. Hydraulic oil filter (1) Remove Use  clamp  type  filter  wrench 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 immed- iately,  and  obtain  medical  aid  immediately. b. Filter head assembly Clean Use  clean  cloth  moistened  with  cleaning (5) solvent  P-D-680 NOTE Don’t perform following steps unless filter head assembly, bypass valve, or bypass spring has been damaged and replacement is necessary. c. d. e. f. g. h. i. Tube fitting (2) Hydraulic  filter restriction switch (3) Fitting (4) Filter  head  assembly  (5) Bypass valve (6) Bypass spring (7) Fitting (8) Loosen  and  dis- connect Remove Remove Remove Remove Remove Remove  from hydraulic reservoir Para  2-31e(1) Turn off fitting by rotating counter- clockwise 2-444