TM 9-1240-400-34&P
13
Remove four screws (31), four lockwashers (32),
access cover (33), and gasket (34).
14
Remove pins (35) only if damaged.
15
Remove four screws (36), prism (37), and two
pins (35).
16
Remove screw (38) and clutch half (39).
Discard screw.
17
Using small wood dowel, carefully remove
observation window (40).
18
Remove four screws (41), four lockwashers (42),
access cover (43), and gasket (44).
CLEANING
Clean all parts per TM 9-254.
REPAIR
Repair is by replacement of authorized parts as required.
Refer to appendix B.
REASSEMBLY/INSTALLATION
1
If removed, install two pins (1) in elbow (2).
2
Install prism (3) and four screws (4).
3
Install gasket (5), access cover (6), four new
lockwashers (7), and four screws (8).
4
Install clutch half (9) and new screw (10). Stake
screw. Refer to TM 9-254.
5
Apply sealing compound (item 10, appx C) to
edge of observation window (11).
6
Install observation window (11) and remove
excess sealing compound.
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