TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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3-28 TM 9-1240-401-34&P 3-19. LEVEL ASSEMBLY MAINTENANCE INSTRUCTIONS (M118A2) - continued b. Disassembly 1 2 3 4 5 6 7 8 9 10 Remove incandescent lamp (8) from mount (9). Remove holder (10) from mount (9). Remove telescope subassembly (11) and sleeve spacer (12). Remove threaded ring (13) from mount (9). Remove holder (14), cam (15), and level (16). Remove two cap screws (17), two Iockwashers (18), and mirror (19). Discard Iockwashers. Remove two headless straight pins (20 and 21), only if damaged. Remove two cap screws (22) and light conductor (23). Using 1-25/32 and 1-51/64 inch tubular spanner wrench, remove retainer (24), shim (25), and win- dow (26). Discard shim. Remove preformed packing (27) from level mount (9) 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. d. Assembly 1 Apply sealing compound (item 13, appx B) to the surface of mount (9) where window (26) is seated. Install window (26) and apply additional sealing compound around the window. Install new shim (25) and using 1-25/32 and 1-51/64 inch tubular spanner wrench, install retainer (24).