TM
9-1240-401-34&P
Remove four machine screws (20), four lock-
10
washers (21), and correction rotating counter (22).
Discard Iockwashers.
11
Remove two machine screws (23) and mask (24)
from correction rotating counter (22).
12
Remove tapered pin (25) and gear (26).
13
Remove four machine screws (27), four lock-
washers (28), and elevation rotating counter (29).
Discard Iockwashers.
14
Remove two machine screws (30) and mask (31)
from elevation rotating counter (29).
Remove tapered pin (32) and gear (33).
15
16
Remove four headless straight pins (34) only if new
correction and elevation rotating counters are to be
installed.
b. Repair
1 Remove corrosion, grease, and dirt from all parts.
Refer to TM 9-254 for cleaning instructions.
2 Visually inspect for missing or damaged parts.
3 Repair or replace parts in accordance with author-
ized parts listed in appendix D.
c. Assembly
1 Install worm setscrew (19) in base (14).
2 Install collar (18) on worm setscrew (19) and se-
cure with headless straight pin (17).
3 Install base (14) on cover (3) and secure with four
new Iockwashers (13) and four machine screws
(12).
4 Install plug (16) and setscrew (15).
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