TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 2-15. M146 TELESCOPE MOUNT FINAL INSPECTION AND ADJUSTMENT - continued a. CHECKING ELEVATION SLIDE/ELEVATION BRACKET END PLAY I 1 2 3 4 5 Using feeler gage, check that maximum of 0.003-inch (0.008-mm) clearance between ma- chined surface of elevation slide and elevation bracket is maintained when the elevation knob is rotated from stop to stop. Remove two cap screws (1), two Iockwashers (2), and cover assembly (3). Discard Iockwashers Tighten or loosen three self-ocking nuts (4) until correct clearance is attained. Apply sealing compound to three self-locking nuts (4). Install cover assembly (3), two new Iockwashers (2), and two cap screws (1). I b. CHECKING ELEVATION KNOB TRAVEL I 2 3 4 5 6 2-22 1 Rotate elevation knob (1) from stop to stop and check amount of travel. NOTE Elevation knob must rotate 2-1/2 complete revolutions. If the 2-1/2 revolutions cannot be met, adjust elevation knob mechanism as di- rected in steps 2 thru 6. Loosen setscrew (2). Loosen self-locking nut (3). Adjust elevation shoulder screw (4) in or out to ob- tain minimum travel requirements. Tighten setscrew (2). Tighten self-locking nut (3).