TM-9-1290-262-24&P Technical Manual for M2A2 Aiming Circle Download
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ARMY TM 9-1290-262-24&P MARINE CORPS TM 00476C-24&P AIR FORCE TO 49A7-3-72/74 4-4. TEST AND ADJUSTMENT PROCEDURES (cont). INSTALLING AND LEVELING AIMING CIRCLE ON AZIMUTH 13 14 15 16 17 18 19 20 21 NOTE In steps 13 thru 21, azimuth level vial (10) bubble should stay centered and not exceed the width of a vial gradua- tion. Turn aiming circle to zero using azimuth knob (7). Eliminate all error in azimuth level vial (10) by loosening plug (11) and turning eccentric (12) right or left, as re- quired, to center level vial bubble. Hold eccentric (12) in adjustment with screwdriver while tightening plug (11) with spanner wrench. Rotate aiming circle to 3200 roils using azimuth knob (7). if azimuth level vial (10) bubble does not stay centered, eliminate half the error by adjusting eccentric (12) and remaining error by adjusting knob assembly (4). Return aiming circle to zero using azimuth knob (7). Azimuth level vial (10) bubble should remain centered. If not, repeat TEST FIXTURE ADAPTER (cont) steps 13 thru 16 until azimuth level vial bubble remains centered. Turn aiming circle to 1600 roils using azi- muth knob (7). If azimuth level vial (10) bubble is not centered, eliminate all error by adjusting knob assembly (4). Return aiming circle to zero using azimuth knob (7). Azimuth level vial (10) bubble should remain centered. If not, repeat steps 13 thru 16. Using azimuth knob (7), rotate aiming circle in four settings of 1600-mil increments. Azimuth level vial (10) bubble should remain centered. If not, If azimuth level vial (10) bubble does not center after thru 20. 4-22 repeat steps 11 thru 16. performing above steps, repeat steps 7