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 5 Level elbow telescope tube level vial by adjusting the eccentric (2). 6 Rotate azimuth ring (1) of test fixture to 3200 mils NOTE Elbow telescope tube level bubble should stay centered. 7 If elbow telescope tube level bubble does not remain centered, eliminate half the error with aiming circle elevation knob (3) and remaining error with the eccentric (2). 8 Return azimuth ring (1) of test fixture and aiming circle to zero. 9 The elbow telescope tube level bubble should remain centered. if not, repeat steps 4 thru 8 until elbow telescope tube level bubble remains centered. 10 With azimuth ring (1) of test fixture and aiming circle set to zero, superimpose aiming circle reticle lines with projector collimator reticle by adjusting projector collimator leveling screws. 11 Rotate azimuth ring (1) of test fixture to 3200 mils Rotate aiming circle to 3200 mils. 12 Look through elbow telescope. The point of intersection of elbow telescope reticle lines and projector collimator reticle lines must coincide within 0.1 mil. If within 0.1 mil, proceed to step 17. If not within 0.1 mil, proceed to step 13. 13 Eliminate half the error with projector colli- mator adjusting screws (4) and remaining error with two reticle adjusting screws. Refer to page 4-27. 14 Return azimuth ring (1) of test fixture and aiming circle to zero. 4-31