ARMY TM 9-1290-262-24&P
MARINE CORPS TM 00476C-24&P
AIR FORCE TO 49A7-3-72/74
3-7. TEST AND ADJUSTMENT PROCEDURES (cont).
BACKLASH IN AZIMUTH WORM (cont)
6 Remove aiming circle from tripod.
7 Loosen setscrew (4).
8 Tighten worm shaft cap (5), being careful
not to bind worm.
9 Tighten setscrew (4).
10 Repeat steps 1 thru 5. If excessive back-
lash is still present, proceed to step 11.
11 Remove two screws (6), azimuth knob (2).
azimuth micrometer scale (3), taper pin
(7), adapter (8), felt washer (9), and index
(10).
12
Remove plug (11) and spring (12).
13
Loosen two setscrews (4 and 13).
14
Remove worm shaft cap (5), worm (14).
ball socket seat (15), and bushing (16).
15
Perform worm ball and gear tests (TM
9-254).
16
Install bushing (16), ball socket seat (15),
worm (14), and worm shaft cap (5).
17
Tighten two setscrews (4 and 13).
18
Install spring (12) and plug (11).
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