75-mm and 81-mm Support Assemblies

ARMY

TM 9-6650-235-13&P

MARINE CORPS

TM-08552A-13&P

j. 75-mm and 81-mm Support Assemblies. There

are two additional pairs of support assemblies (75-mm

and 81-mm) in the borescope optical case. These

support assemblies are issued to provide support when

inspecting. 75-mm or 81-mm cannon bores. The

appropriate support assembly is installed over the M3

Borescope and held in position by three setscrews.

k. Large Reflector Assembly. The large reflector

75-MM AND 81-MM SUPPORT ASSEMBLIES

assembly is installed on the illuminating head assembly

in place of the small reflector when inspecting large bore

diameters (105-mm thru 8-in.). It is secured by the three

screws that normally secure the small reflector to the

illuminating head assembly. The large reflector

assembly concentrates the light on the area being

inspected.

l. Shaft Collar. The shaft collar is used when the

large reflector assembly is used. It is the opposite

reflecting surface for the large reflector assembly and

concentrates light on the area being inspected. It is

positioned over the groove on the illuminating head

assembly near the mirror assembly and secured in place

by three setscrews.

LARGE REFLECTOR ASSEMBLY

SHAFT COLLAR

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