TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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3-35 TM 9-1240-401-34&P 7 8 9 10 11 12 13 14 15 16 17 18 Loosen cap screw (11) and remove nut (12) and ring spacer (13). Carefully separate rear housing (14) from eyepiece arm (3). Remove lock-release lever and bellows assembly (ref. para 3-13). Remove arm ratchet (15), shuttle (16), and spring washer (17) from eyepiece arm (3). Remove seal (18), shim (19), and protective cup (20) from eyepiece arm (3). Discard shim. Remove two cotter pins (21 ) and two flat washers (22). Remove two shouldered pins (23) and two springs (24) from rear housing (14). Discard cotter pins. Remove preformed packing (25) from groove in rear housing (14). Discard preformed packing. Scribe a reference mark on fried ratchet (26) and rear housing (14). Remove six cap screws (27) and six Iockwashers (28) from fixed ratchet (26). Discard lockwashers. Remove fixed ratchet (26), spacer (29), and re- maining section of seal (18). Remove preformed packing (30) from remaining section of seal (18). Discard preformed packing. Remove two headless straight pins (31) only if damaged. b. 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.