TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P COLLIMATION 1 Set azimuth ring (1) to "0" coincidence on azimuth testing fixture (2). 2 Set gunner’s aid counter (3) to 00-00 detent. 3 Rotate elevation knob (4) and deflection knob (5) until telescope reticle is in coincidence with projector collimator (6) while sighting through eyepiece (7). Both open sight (8) and index on elevation knob (4) should indicate zero position. If not, go to step 4. 2-69