BORESCOPE EXTENSION TUBE I, II, or III--MAINTENANCE INSTRUCTIONS.

ARMY

TM 9-6650-235-13&P

MARINE CORPS

TM-08552A-13&P

5-26.

BORESCOPE EXTENSION TUBE I, II, or III--MAINTENANCE INSTRUCTIONS.

This task covers:

a. Disassembly

Reassembly

b. Cleaning/Repair

INITIAL SETUP

Tools and Special Tools

References

Instrument and fire control shop

TM 9-254

equipment SC 4931-95-CL-A07

Socket wrench case 11584760

Troubleshooting References

5-4 A distorted image is seen

through the M3 Borescope

Materials/Parts

Lens paper (item 10, app D)

Optical lens cleaning compound

(item 2, app D)

Solder (item 15, app D)

DISASSEMBLY.

NOTE

Each borescope extension tube consists of two interconnecting sections and their associated

parts. Disassembly of each section is identical, as well as the maintenance on the associated

parts. Reassembly of the two interconnecting sections is identical except for the placement of the

optical element erector lens cell assembly. Except for that difference, the maintenance

instructions are described only once in this manual and are meant to apply to all sections and

subassemblies which make up the three borescope extension tubes.

5-68