TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 3-18. LEVEL ASSEMBLY MAINTENANCE INSTRUCTIONS (M118A3) - continued e. Installation 1 2 3 If two headless straight pins (8) were removed, redrill using No. 44 (0.086) drill, drill 3/8 inch (9.53 mm) deep. Ream for drive fit in housing and slip fit in level assembly (3). Position level assembly (3) over housing and at- tach wires (4); red wire to positive (+) terminal and the black wire to the negative (-) terminal of the circuit board assembly (7) using two new lock- washers (5) and two nuts (6). Install level assembly (3) over two headless straight pins (8) and secure with four new lock- washers (2) and four machine screws (1). f. Adjustment 1 2 3 4 5 6 7 8 9 Install M118A3 elbow telescope on howitzer and level trunnions (ref. TM 9-2350-311-10). Check that level (13) vial bubble is within the cen- ter graduation marks of the vial. If bubble is not within the center graduation marks, go to step 3. Loosen threaded ring (9). Engage fabricated eccentric tool into holder (11) and threaded ring (9). Insert a straight blade screwdriver through the cen- ter hole in the eccentric tool. Adjust cam (12) until level (13) vial bubble is cen- tered. Tighten threaded ring (9), being careful not to dis- turb setting of vial. Apply sealing compound (item 15, appx B) in the space (A) between brass portion of level (13) vial assembly and mount (10). Apply sealing compound (item 13, appx B) to slot (B) of threaded ring (9) and threads of mount (10). 3-26