TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P 5-19. FINAL INSPECTION INSTRUCTIONS (CONT). CHECKING M137 TELESCOPE MOUNT CANT CORRECTION 1 Set 500 mils into gunner’s quadrant (1) and place on level bar (2). 2 Rotate handwheel (3) for 500 mil depression. 3 Set 177.8 mils into gunner’s quadrant (1) and place on top surface of cross-leveling fixture (4). 4 Rotate lower handwheel (5), to the right, to 177.8 mil cant angle. 5 Rotate elevation knob (6) and center bubble in cross-level vial (7). 6 Correction counter (8) should read 96.1 ± 0.5 mils. 7 Repeat steps 4 thru 7, checking cant to the left. 8 Repeat steps 4 thru 8 for 800 and 1000 mil elevation. Connection should be 180.5 + 1.0 mils and 271.9 ± 2.0 mils respectively. 5-68