TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P I c. CHECKING ELEVATION KNOB MECHANISM RUNNING TORQUE I 1 With torque wrench and adapter (8599922), rotate elevation knob (1) clockwise and counterclockwise. NOTE Torque wrench should indicate running torque of 56 to 72 ounce-inches (0.395 to 0.508 N-m). If running torque is not within specified limits, adjust as directed in steps 2 thru 4. 2 Loosen setscrew (2). 3 Using fabricated spanner wrench, adjust threaded ring (3) until required running torque is obtained. 4 Tighten setscrew (2). I d. CHECKING DEFLECTION KNOB TRAVEL I 1 2 3 4 5 6 Rotate deflection knob (1) from stop to stop and check amount of travel. NOTE Deflection knob must rotate 2-1/2 complete revolutions. If the 2-1/2 revolutions cannot be met, adjust mechanism as directed in steps 2 thru 6. Loosen setscrew (2). Loosen self-locking nut (3) on deflection shoulder screw (4). Adjust deflection shoulder screw (4) in or out to obtain minimum travel requirements. Tighten setscrew (2). Tighten self-locking nut (3). 2-23