TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311-20-1 8-34 CIRCUIT BREAKERS (M109A4/M109A5) This task covers: a. Removal b. Installation Applicable Conditions . . M1 09A4/M109A5 Tools General mechanic’s tool kit (item 64, Appx H) Materials/Parts Lockwashers(16) (item 85, Appx G) Lockwashers (2) (item 95, Appx G) . . Equipment Conditions Portable and driver's instrument panels removed (para 8-17) a. Removal 1 2 3 4 5 6 7 Ensure MASTER switch is OFF when working on hull electrical systems to avoid electrical shock and bums. Identify and tag 16 electrical leads (1). Remove two screws (2), two flat washers (3), and two Iockwashers (4). Discard Iockwashers. Remove circuit breaker panel (5). To remove individual circuits, first identify problem circuit. See wiring diagrams in Section Ill, this chapter and Appendix 1. Disconnect 16 identified electrical leads (1) at circuit breaker (6). Remove two screws (7), two flat washers (8), two Iockwashers (9), and two nuts (1 O) at identified problem circuit breaker (6). Discard Iockwashers. Remove circuit breaker (6). b. Installation Ensure MASTER switch is OFF when working on hull electrical systems to avoid electrical shock and bums. 1 Install circuit breaker (6), two flat washers (8), two new Iockwashers (9), two screws (7), and two nuts (10). WARNING 8-88