TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P 2-17. M115 PANORAMIC TELESCOPE FINAL INSPECTION INSTRUCTIONS (CONT). COUNTER OPERATION AND ADJUSTMENT 1 Reset counter (1) must follow when deflection knob (2) is rotated. 2 Push in and rotate reset knob (3) to return reset counter (1) to 3200 mils. 3 If requirements in steps 1 and 2 cannot be met, replace reset counter. Refer to page 2-42. 4 Rotate gunner’s aid knob (4) 50 mils in window (5) and note that deflection counter (6) increases 50 mils. 5 Rotate gunner’s aid knob (4) 50 mils in window (7) and note that deflection counter (6) decreases 50 mils. 6 If requirements of steps 1 and 2 cannot be met, replace gunner’s aid counters (5 and 7). Refer to page 2-42. 7 Set both counters to "00". 8 If the displays are not centered in the counter windows, remove overlay assembly (8). Refer to page 2-42. 9 Remove setscrews (9 and 10) and adjust setscrews (11 and 12) to center displays. Install setscrews (9 and 10) and overlay assembly (8). Refer to page 2-42. 10 If requirements of steps 7 and 8 cannot be met, replace gunner’s aid counters (5 and 7) and differential gear (13). Refer to page 2-42. 2-76