TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P 15 Coat gears with aircraft grease (item 8, appx C). 16 Apply a coat of adhesive (item 4, appx C) to edge of cover assembly (13). 17 Install cover assembly (13), four lockwashers (12), and four screws (11). 18 Recheck torque and backlash. Refer to step 1. CHECKING AND ADJUSTING COUNTER AND STOP ASSEMBLY 1 With M137 telescope mount and fixture level, and the correction counter at zero, place gunner’s quadrant (1) on level bar (2). 2 Rotate elevation knob (3) to obtain an elevation of 1333 mils and then a depression of 89 mils (9911) as read on elevation counter (4). The counter reading shall be within 1.0 mil of the angle indicated by gunner’s quadrant (1). If not, proceed to step 3. 3 Remove four screws (5) and four lockwashers (6) from cover assembly (7). 4 Remove cover assembly (7) from housing (8). 5 Determine whether elevation or depression meets minimum travel (elevation 1333 mils or depression 9911 mils) by rotating elevation knob (3) to limits of travel, and measuring with gunner’s quadrant (1). 5-63