OBJECTIVE TUBE ASSEMBLY--MAINTENANCE INSTRUCTIONS.

ARMY

TM 9-6650-235-13&P

MARINE CORPS

TM-08552A-13&P

5-20.

OBJECTIVE TUBE ASSEMBLY--MAINTENANCE INSTRUCTIONS.

This task covers:

a. Disassembly (forward section)

d. Disassembly (rear section)

b. Cleaning/Repair (forward section)

e. Cleaning/Repair (rear section)

c. Reassembly (forward section)

f. Reassembly (rear section)

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

Materials/Parts

through the M3 Borescope

Lens paper (item 10, app D)

Optical lens cleaning compound

(item 2, app D)

Solder (item 15, app D)

DISASSEMBLY (FORWARD SECTION).

NOTE

The objective tube assembly consists of two connecting sections and their associated parts. The

forward section (the section connecting to the illuminating head assembly) contains an objective

lens optical cell assembly and is disassembled and reassembled differently from the rear section.

Therefore, disassembly and reassembly of each section will be covered independently in this

procedure.

5-46