TM 9-1240-400-34&P
213
MAINTENANCE OF OPTICAL INSTRUMENT WORM ASSEMBLY, OPTICAL INSTRUMENT COLLECTIVE
CELL ASSEMBLY, OPTICAL INSTRUMENT OBJECTIVE CELL ASSEMBLY, AND RETICLE ASSEMBLY.
This task covers:
a. Removal/ Disassembly
c.
Repair
b. Cleaning
d.
Reassembly/Installation
INITIAL SETUP:
Tools and Special Tools
Equipment Conditions
Tool kit, electronic: system maintenance
2-28 Worm assembly removed
(SC 5180-95-CL-B29)
Spanner wrench (item 7, appx D)
General Safety Instructions
Tubular spanner wrench, 27/32 and 55/64
(7597650)
Tubular spanner wrench, 31/32 and 63/6
(7597647)
Tubular spanner wrench, 1 and 1-1/64
(7597648)
Use adhesives, cleaning solvents,
Tubular spanner wrench, 1-1/16 and
and sealing compounds in well-
1-5/64 (7597650)
ventilated area away from open
flame. Adhesives, cleaning sol
Materials/Parts
vents, and sealing compounds
Sealing compound (item 10, appx C)
are harmful to skin and clothing,
can burn easily, and may give off
References
harmful vapor.
TM 9-254
REMOVAL/DISASSEMBLY
1
Remove setscrew (1) and cell assembly (2) from
gear (3) using tubular spanner wrench (7597650).
NOTE
Step 2 is written and illustrated for
disassembly of cell assembly (8587297).
2
Remove cell (4) and lens (5) from optical element
cell (6) using tubular spanner wrench (7597647).
2-39
