TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 4-24. M145/M145A1 TELESCOPE MOUNT FINAL INSPECTION AND ADJUSTMENT - continued g. CANT ADJUSTMENT 1 2 3 4 5 6 7 8 9 10 11 Install M117/M117A2 panoramic telescope (1) on M15/M145A1 telescope mount (2) (ref. TM 9-2350-311-10 or TM 9-2350-314-10). Rotate M117/M117A2 panoramic telescope, using azimuth knob (3), until azimuth counter (4) indi- cates 4800 mile. Reset M117/M117A2 panoramic telescope (1) re- set counter (5) to 3200 mils. Using M1A1 gunner's quadrant mounted on fixture adapter mounting surface (6), adjust fixture adapter for 88.9 roils cant. Level M117/M117A2 panoramic telescope (1) us- ing pitch knob (7), cress-level knob (8), and eleva- tion handwheel (9) on cross-leveling fixture (10). Set elevation counter (11) to 300 roils. Level the M117/M117A2 panoramic telescope (1) using pitch knob (7), cross-level knob (8), and ele- vation handwheel (9) on cross-leveling fixture (10). While looking through M117/M117A2 panoramic telescope (1) eyepiece (12), rotate M117/M117A2 panoramic telescope (1) using azimuth knob (3). Aline reticle of M117/M117A2 panoramic telescope (1) with a plumbline at 90° to the fixture assembly. Repeat steps 2 through 9 with fixture cant in the opposite direction 88.9 mils. Return cross-leveling fixture (10), M145/M145A1 telescope mount (2), and M117/M117A2 panoramic telescope (1) to zero and level. Reset all counters. 4-56