TM-9-2350-311-10

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 515 of 775

TM 9-2350-311-10

3-7 FIRE CONTROL ALINEMENT TESTS AND MEASUREMENTS - CONTINUED

3-7.12

7

8

9

10

Testing the M15 Elevation Quadrant and Auxiliary Quadrant (On M145/M145A1 Telescope Mount)

— Continued

Turn the cross-level mechanism knob (13) on the M145/M145A1 telescope mount (14) and center

cross-level (15) bubble. Turn pitch-level knob (16) and center pitch-level (17) bubble.

Turn correction knob (18) and zero the correction counter (19).

Turn elevation handwheel (20) and center elevation level (21) bubble.

Check reading on elevation counter (22). It should read no less than 9999 (–1 mil elevation) and no more

than 0001 (+1 mil elevation).

3-111