TM 1-1520-238-23
1-148
1.46.
TARGET ACQUISITION AND DESIGNATION SIGHT (TADS) CLEANING – continued
CAUTION
Water can destroy inner optics and electronics. Ensure shroud assemblies and installation hardware
are securely fastened before cleaning.
d. Repeat steps b and c; use detergent and water solution.
(1) Mix one ounce of detergent with one gallon of water. Use pail and detergent (item 71, App F).
(2) Rinse with clean fresh water.
e. Allow surface to air dry 10 MINUTES.
1.46.4. Optical Relay Tube (ORT) Window Cleaning
CAUTION
Do not touch lens with bare hands. Do not wipe lens with cleaning cloth. Damage to special optical
coatings could result. Clean with appropriate materials only (TM 1-1270-476-20).
The water and detergent solution can damage internal ORT components. Make sure solution does
not seep into internal structure.
a. Mix 1 ounce of detergent with 1 gallon of water. Use pail and detergent (item 71, App F).
b. Wash ORT window surfaces with a clean lint-free cloth and water-detergent solution. Cloth should be
damp but not wet enough to drip. Use cloth (item 52, App F) and detergent (item 71, App F).
c. Rinse all surfaces immediately with clean fresh water. Use a clean cloth (item 52, App F) that is damp but
not wet enough to drip.
d. Allow surfaces to air dry.
END OF TASK
