12-96. TM 9-2320-361-20 This task covers: a. Removal c. Assembly b. Disassembly d. Installation INITIAL SETUP: APPLICABLE MODELS REFERENCES (TM) M764 TM 9-2320-361-10 MATERIALS/PARTS Three lockwashers Two woodruff keys TM 9-2320-361-20P EQUIPMENT CONDITION • Parking brake set (TM 9-2320-361-10). Three cotter pins ŽEarth boring machine seat frame removed (para. 12-92). Maintenance procedures are the same for feed and drive levers. This procedure covers the drive lever. 1. Remove nut (11), screw (17), and latch (16) from bracket (12). 2. Remove cotter pin (7), clevis pin (9), and clevis (8) from lever (10). Discard cotter pin (7). 3. Remove nut (21), screw (19), plate (20), and operating handle (22) from lever (10). 4. Remove three screws (14), lockwashers (13), and bracket (12) from main support tube (15). Discard lockwashers (13). 5. Loosen two screws (24) and remove two arms (25), rod (3), and two woodruff keys (23) from cams (18). Discard woodruff keys (23). 1. Remove two cotter pins (28) from shaft (27). Discard cotter pins (28). 2. Remove shaft (27), two bushings (26), and levers (10) from bracket (12). NOTE To maintain proper operation lever travel distance, note length of threads visible at each end of pushrod. 3. Remove two nuts (1), rod (3), two springs (2), and stop (4) from pushrod (5). 4. Remove clevis (8) and nut (6) from pushrod (5). NOTE For steps 1 and 2, ensure visible threads match measurements noted in disassembly. 1. Install nut (6) and clevis (8) on pushrod (5). 12-160