ARMY TM 9-2815-254-24 AIR FORCE TO 38G1-94-2 SECTION  VI.  LUBRICATION  SYSTEM 3-14. OIL  FILTER. 3-14.1.  Cartridge  Replacement. a. Drain lubrication system, refer to end item maintenance manual. b. Loosen cartridge (1, FIGURE 3-38) by turning counterclockwise with a filter wrench. c. Discard used cartridge. d. Wipe filter head (2) with a clean rag. e. Apply light coat of oil to new cartridge (1) gasket. f. Place cartridge on filter head (2) and turn clockwise until cartridge is hand-tight on head. g. Using filter wrench, turn cartridge an additional 1 to 1-1/4 turns. h. Service lubrication system, refer to end item maintenance manual. i. Operate engine and check for leakage. 3-14.2.   Removal. a. Drain lubrication system, refer to end item maintenance manual. b. Remove four screws (3, FIGURE 3-38) securing filter head (2) to engine; remove filter head and o-ring (4). NOTE Cartridge (1) does not have to to be removed to remove head. c. Cover opening to prevent entry of dirt. 3-14.3.  Installation. a. Wipe engine and filter head (2, FIGURE 3-38) mating areas with a clean rag. b. Install o-ring (4). Position head (2) on engine and secure with four screws (3). Tighten screws to 168 in-lbs (19.0 Nm). Change 2    3-69