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Page Title:
Appendix F. ADAPTER TUBE ASSEMBLY ALTERATION |
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 ARMY
TM 9-6650-235-13&P
MARINE CORPS
TM-08552A-13&P
APPENDIX F
ADAPTER TUBE ASSEMBLY ALTERATION
F-1.
SCOPE.
This appendix gives the procedure and lists the parts needed for updating the adapter tube assembly to the latest
configuration.
F-2.
GENERAL.
This procedure allows 24-volt operation of the M3 Borescope without use of the 24-V electrical power cord adapter
assembly. The adapter tube assembly will be updated if the 24-V electrical power cord adapter assembly is damaged and
replacements are no longer available.
F-3.
PARTS REQUIRED.
NOMENCLATURE
PART NO.
NSN
QUANTITY
Switch, toggle
MS24524-21
1
Decal
12520553
1
Decal diagram
11584862-1
7690-01-141-4795
1
Plug
12520554
1
Wire, electrical, black
M16878/4BHEO
V
Wire, electrical, red
M16878/4BHE2
V
Wire, electrical, green
M16878/4BHE5
V
Wire, electrical, blue
M16878/4BHE6
V
Wire, electrical, white
M16878/4BHE9
V
Paint stick
MARKAL type B
V
F-4.
DISASSEMBLY.
Disassemble using the procedure for disassembly in paragraph 5-30, ADAPTER TUBE ASSEMBLY--(EARLY
PRODUCTION)--MAINTENANCE INSTRUCTIONS.
F-5.
ALTERATION PROCEDURE.
a. Drill or ream out circuit breaker hole to 0.469 (15/32) inch (see figure F-1).
b. Drill 0.149 (#25 drill) hole in location shown (see figure F-1).
c. Fill in the following engravings on the front cover per MIL-STD-171 with paint stick, MARKAL type B (black) (item
8, app D): white, 24-V, and 115-V.
d. Apply decal 12520553 to front cover around 0.469 inch hole.
e. Install plug in hole where indicator light was located.
F-1
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