TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 2-11. M146 TELESCOPE MOUNT MAINTENANCE INSTRUCTIONS - continued I a. Disassembly 2 3 4 5 6 7 8 9 10 11 1 Remove three cap screws (1) and three lock- washers (2). Discard Iockwashers. Lift retaining ring (3), headed grooved pin (4), spring (5), and yoke pin (6) as a unit from M146 telescope mount. Headed grooved pin (4) is under spring ten- sion. Disengage retaining ring (3) and remove headed grooved pin (4) and spring (5) from yoke pin (6). Remove three cap screws (7) and three lock- washers (8). Discard Iockwashers. Remove yoke pin (9) and yoke (10) from bracket (11). Remove chain assembly (12) by removing two ma- chine screws (13) and two Iockwashers (14). Dis- card Iockwashers. Remove setscrew (15) and insert (16). Unscrew and remove knob (17), tapered pin (18), shaft collar (19), and tapered pin (20) as a unit from elevation slide (21). Scribe a matching mark on shaft collar (19) and tapered pin (20). Aline access holes in knob (17) with tapered pin (18). Support knob (17) with a V-block and drive tapered pin (18) from tapered pin (20) and shaft collar (19). 2-8