FIRE CONTROL LEVEL INSTALLATION (CONT)

TM 9-1220-231-34&P

4-16.

FRAME 2

Step

Procedure

Check ballistic drive fire control level bubble (1) is centered.

NOTE

If bubble is centered, go to step 4; if not, continue with

step 2.

Using spanner wrench, loosen ring (2) slightly.

Using 3/16" screwdriver, turn eccentric (3) left or right until level vial assembly bubble

(1) is centered.

NOTE

Eccentric (2) may have to be held in position with

3/16" screwdriver to prevent it from turning when

doing next step.

Using spanner wrench, tighten ring (2).

Check level vial assembly bubble (1) remains centered. If not, repeat steps 2 through 5.

Remove gunner's quadrant.

NOTE

FOLLOW-ON MAINTENANCE

Do performance test (Vol I, Chap 2 )

END OF TASK

Vol II

4-30