TM 9-1240-400-34&P
2-11.
MAINTENANCE OF HEAD ASSEMBLY (CO
DISASSEMBLY (CONT)
9
Using adjustable spanner wrench, remove retainer
(15) and preformed packing (16)
Discard
preformed packing.
10 Remove nonmetallic washer (17), spring (18), and
nonmetallic washer (19).
11 Remove plug (20), spring (21), and bearing (22).
12 Remove worm shaft (7) with self-locking nut (23), flat
washer (24), and bearing (25) attached.
13 Remove and discard self-locking nut (23), flat
washer (24), and bearing (25) from worm shaft (7).
14 Remove two setscrews (26).
NOTE
To aid in removal of prism, install two
screws (1) on head assembly.
15 Using adjustable spanner wrench, remove externally
threaded ring (27), preformed packing (28), and
prism (29) Discard preformed packing.
2-24
