TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 5.1-17 LEVEL ASSEMBLY MAINTENANCE INSTRUCTIONS - continued c. Assembly 1 2 3 4 Using suitable pliers, bend detent tabs on level vial covers (1 and 2) closer together or farther apart, as required to obtain desired fit. Position level vial covers (1 and 2) between bosses of bracket (3). Install fire control levels (4 and 5) by sliding into bracket (3) and into level vial covers (1 and 2). Install eccentric bushings (6 and 7). Install rings (8 and 9) into bracket (3) and tighten rings snug against eccentric bushings (6 and 7) using fabricated eccentric tool (fig. C-2, appx C). d. Adjustment NOTE Install cross-level knob on M15 quadrant. Install M15 quadrant on howitzer by procedures described in TM 9-2350-311-20-2. 1 2 3 4 5 Level trunnions and gun tube as described in TM 9 2350-311-10. Turn spur gear assembly (1) until correction counters register 00 mils. Turn elevation handwheel (2) until elevation counter registers 0000 mils. Adjust elevation handwheel (2) to center bubble of fire control level (3). Loosen three screws (4) to disengage differential spur gear (5) from spur gear shaft (6). Rotate differential spur gear (5) to zero counter, then tighten three screws (4). 5.1-32 Change 1