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![]() ARMY
TM 9-6650-235-13&P
MARINE CORPS
TM-08552A-13&P
5-22.
OBJECTIVE LENS OPTICAL CELL ASSEMBLY--MAINTENANCE INSTRUCTIONS.
CLEANING/REPAIR.
WARNING
Solvent vapors are toxic. Do not use
solvent in a confined space. Avoid
long periods of breathing solvent
vapors and/or contact with skin.
NOTE
Technical methyl ethyl ketone may be
used to clean lenses if the optical
lens cleaning compound is not
available, but water spots must first
be removed with a general purpose
detergent and lens paper.
b.
Inspect for cracks, breaks, worn or missing parts.
a.
Dust optical instrument lens (1) and optical
c.
Replace authorized parts. See appendix C.
instrument window (2) with the brush from socket
wrench case. Clean all lenses with lens paper and
optical lens cleaning compound. See TM 9-254.
REASSEMBLY.
a.
With the convex (rounded) sides of the optical
instrument lenses (1 and 3) facing into the optical
element retainer and with the ring spacer (2)
between them, position optical instrument lens (1),
ring spacer (2), and optical instrument lens (3) in
the optical element retainer (4) with attached optical
instrument window (5).
b.
Install cap (6) with optical instrument lens (7)
attached and tighten.
5-64
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