TM 9-2320-361-20 11-27. DRIVER’S SEAT BASE MAINTENANCE This task covers: a. Removal c. Installation b. Inspection and Repair INITIAL SETUP: APPLICABLE MODELS REFERENCES (TM) All TM 9-2320-361-10 MATERIALS/PARTS TM 9-2320-361-20P TM 9-237 Twelve lockwashers Pin EQUIPMENT CONDITION GAA grease (Appendix C, Item 13) Parking brake set (TM 9-2320-361-10). PERSONNEL REQUIRED Driver’s seat removed (para. 11-28). Driver’s seat cushion, backrest, frame, and seat Two adjuster removed (para. 11-29). Assistant will help with entire procedure. 1. Turn crank (2) counterclockwise to remove tension on spring (3). 2. Remove two nuts (1), screws (7), and shock absorber (5) from seat base (4) and top frame (6). 3. Remove four nuts (8), lockwashers (9), screws (11), and two brackets (10) from seat base (4). Discard lockwashers (9). 4. Remove spring (3) from seat base (4) and top frame (6). 11-44