TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 4-15. LEVEL ASSEMBLY MAINTENANCE INSTRUCTIONS - continued I J d. Assembly - continued 14 If removed, press headless straight pin (9) into bracket (7) so that the headless straight pin pro- trudes far enough into the cross-level (6) hole to engage cross-level (6). 15 Position cover (8) into bracket (7) and slide cross- Ievel (6) into position so the slot in the end of the cross-level (6) engages headless straight pin (9). 16 Install cell (5) and secure with threaded ring (4), using fabricated eccentric tool. Do not tighten threaded ring (4) at this time. I e. Installation I NOTE Position contact wires in the grooves of the level assembly. Check to ensure wires are not pinched between the M145/M145A1 telescope mount and level assembly during installation. 1 If removed, install two headless straight pins (3). 2 Mount level assembly(1) and secure with two cap screws (2). 3 Level gun tube (TM 9-2350-311–10 or TM 9-2350-314-10). f. Adjustment I 2 3 4 5 1 Loosen threaded rings (4 and 17) using fabricated eccentric tool. Place 1/2- by 3/4-by 6-inch parallel baron bear- ing plate in telescope socket (35) so that it is at right angle to main shaft (36). Place zeroed M1A1 gunner’s quadrant (37) on par- allel bar. Adjust pitch knob until gunner’s quadrant (37) level (38) bubble is centered. Apply sealing compound (item 15, appx B) to threaded ring (17) and install threaded ring into bracket (7). 4-24