TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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5. 1-24. M15 TM 9-1240-401-34&P 1 2 3 4 5 6 7 8 Turn cross-level knob (1) counterclockwise to stop. Turn lower section handwheel (2) on cross-leveling fixture until bubble in cross-level fire control level (3) is centered. Read lower section scale wheel (4) at vernier zero line. The angle must be no less than 300 mils. Return test fixture adapter (5) to approximately level position. Turn cross-level knob (1) clockwise to stop. Turn lower section handwheel (2) until bubble in cross-level tire control level (3) is centered. Read scale wheel angle at vernier zero graduation. The indicated cant angle must be no less than 300 mils. Return cross-leveling fixture to approximately zero in cant and elevation. 5.1-72 Change 1