TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P ITEM ITEM T0 NO. BE INSPECTED PROCEDURE 5 Valve and Cap Inspect for damage such as bends or breaks and ability to hold pressure; must not be bent or broken and must hold pressure. 6 Window, Eyelens Inspect for dirt, fungus or condensation, which may obstruct view through eyepiece; must be clean and free of moisture. 7 Elbow Assembly Inspect by viewing through telescope to determine if interfering fractures exist on window, lens, prisms or reticle; chipped, scratched, or pitted optics that interfere with field of view must be replaced with authorized parts. 8 Deflection Knob Use torque wrench and torque adapter (8599917) to rotate knob in each direction. Knob shall operate within 4.00 to 8.00 in.-lb (0.45 to 0.90 N-m) of torque. 9 Hand Crank Swing on pivot pin to determine freedom of move- ment. Crank must not bind or show evidence of excessive wear at pivot pin. 10 Direct-Indirect Knob Rotate knob 360 degrees. Knob must snap into detents at 180 degree intervals, and must produce an audible click at each 5 mil excursion of deflection knob when set in DIRECT fire position. 2-3