TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
Page 69 of 344
TM 9-1240-401-34&P 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Remove two cap screws (19), two lockwashers (20), and limit plate (21) to gain access to plug (22). Discard Iockwashers. Remove plug (22) only if necessary to seal. Remove air valve cap (23), valve core (24), purging valve stem (25), and retaining strap (26) from eye- piece arm (6). Remove six machine screws (27) and six lock- washers (28). Discard Iockwashers. Pull variable resistor housing (29) as far as wiring will permit. Slide insulation sleeving from terminals of variable resistor (30). Using tape, tag and unsolder wire leads from vari- able resistor (30). Remove variable resistor housing (29) from rear housing (31). Remove setscrew (32) and knob (33). NOTE Nut and Iockwasher are part of variable resis- tor. Retain for assembly. Remove nut (34) and Iockwasher (35) from vari- able resistor (30). Remove variable resistor (30) from variable resistor housing (29). Remove gasket (36) from rear housing (31 ) and discard. Remove four machine screws (37) and four lock- washers (38). Discard Iockwashers. Pull receptacle connector (39) from rear housing (31) as far as wiring will permit. Remove insulation sleeving from terminals of re- ceptacle connector (39). Using tape, tag and unsol- der wire leads from receptacle connector (39) and gasket (40). Discard gasket. Remove four machine screws (41), four lock- washers (42), mount telescope adapter (43), and gasket (44) from rear housing (31). Discard lock- washers and gasket. Remove warning labels (45 and 46) only if dam- aged. 3-11