TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 5.1-7. GENERAL SUPPORT INITIAL INSPECTION - continued Item No. Item To Be Inspected 6 CORRECTION KNOB 7 CROSS-LEVEL VIAL 8 ELEVATION COUNTER Procedures Check that torque required to turn correction knob in either direction between detent positions does not exceed 3 pound-inches (0.339 N- m). Check that cross-level vial bubble is centered within one graduation line when quadrant is in reference level position. (Refer to final inspection, para 5.1-24, to level the cross-leveling fixture.) Depress M15 quadrant to 200 mils by rotating upper section of fixture and check that level vial bubble remains centered. Elevate M15 quadrant to 1300 mils and check that level vial bubble remains centered. a. Check that elevation counter registers at least 1383 mils when elevation knob (4) is turned clockwise to stop and not more than 9772 mils when turned counterclockwise to stop. b. With M15 quadrant in reference level position (ref. final inspection, para 5.1-24, for leveling procedures) and correction counters (9) set at 00, check that elevation counter registers 0000 + 0.5 mil. c. Check that all numerals aline within 1/16 inch (1.588 mm). 5.1-8 Change 1