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 4 5 6 7 8 9 10 11 Remove spring washer (11) and two ratchets (12) from worm shaft (9). Scribe a reference mark on knob (13) and worm shaft (9). Support knob (13) with a V-block and drive out ta- pered pin (14). Remove knob (13) from end of worm shaft (9). Remove setscrew (15) from worm shaft housing (16). Remove bushing (17) from worm shaft housing (16). Remove preformed packing (18) from bushing (17). Discard preformed packing. Remove worm shaft (9) from worm shaft housing (16). Remove two preformed packings (19 and 20) from worm shaft (9). Discard preformed packing. Remove preformed packing (21) from worm shaft housing (16). Discard preformed packing. 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. 3-17