OPERATION IN EXTREME HOT WEATHER CONDITIONS.

ARMY

TM 9-6650-235-13&P

MARINE CORPS

TM-08552A-13&P

c. The M3 Borescope is constructed of anodized

aluminum which is highly resistant to corrosion but will

form a salty film on the exterior if exposed to hot, salty,

or damp air. Keep the M3 Borescope in the borescope

optical case and keep the borescope optical case closed

as much of the time as conditions permit.

2-13. OPERATION IN EXTREME HOT WEATHER

CONDITIONS.

If the M3 Borescope must be operated in extreme hot

weather conditions, protect the lenses and the rubber

part of the eyepiece assembly from the direct rays of the

sun to prevent damage.

2-14.

OPERATION

DUSTY

AND

SANDY

CONDITIONS.

a. Dust and sand can cause damage to both the

lenses and mating surfaces of the M3 Borescope.

Ensure the lenses are cleaned with the brush in the

socket wrench case.

b. Also ensure the mating surfaces of the M3

Borescope are cleaned with a wiping rag (item 12, app

D) prior to assembly and again before the M3 Borescope

is returned to the borescope optical case.

c. Keep the instrument covered and in the

borescope optical case as much of the time as possible.

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