TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 3-18. LEVEL ASSEMBLY MAINTENANCE INSTRUCTIONS (M118A3) - continued a. Removal 1 2 3 4 Remove four machine screws (1) and four lock- washers (2). Discard Iockwashers. Remove level assembly (3). Using tape, tag and disconnect wires (4) by remov- ing two Iockwashers (5) and two nuts (6) from cir- cuit board assembly (7). Discard lockwashers. Remove two headless straight pins (8) only if dam- aged. b. Disassembly 1 2 3 4 5 6 7 Remove threaded ring (9) from mount (10). Remove holder (11), cam (12), and level (13). Remove two cap screws (14), two Iockwashers (15), and mirror (16). Discard Iockwashers. Remove two headless straight pins (17 and 18) only if damaged. Remove two machine screws (19), two lock- washers (20), circuit board assembly (7), and two sleeve spacers (21). Using 1-25/32 and 1-51/64 inch tubular spanner wrench, remove retainer (22), shim (23), and win- dow (24). Discard shim. Remove preformed packing (25) from mount (10) and discard. c. Repair 1 Remove corrosion, grease, and dirt from all parts. Refer to TM 9-254 for cleaning instructions. 2 Visually inspect for missing or damaged parts. 3 Repair or replace parts in accordance with author- ized parts listed in appendix D. 3-24