OBJECTIVE LENS OPTICAL CELL ASSEMBLY--MAINTENANCE INSTRUCTIONS.

ARMY

TM 9-6650-235-13&P

MARINE CORPS

TM-08552A-13&P

5-22.

OBJECTIVE LENS OPTICAL CELL ASSEMBLY--MAINTENANCE INSTRUCTIONS.

This task covers:

Disassembly

Reassembly

Cleaning Repair

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

General purpose detergent

(item 5, app D)

Equipment Condition

Lens paper (item 10, app D)

5-46 Objective lens optical

Optical lens cleaning compound

cell assembly removed from

(item 2, app D)

forward section of objective

Technical methyl ethyl ketone

tube assembly

(item 7, app D)

DISASSEMBLY.

NOTE

Care should be taken when disassembling optical components of the M3 Borescope. All lenses

should be marked when removed to facilitate installation. Refer to page 5-9 for marking

instructions.

Unscrew cap (1) with optical instrument lens (2)

attached and remove

Slide optical instrument lens (3), ring spacer (4),

and optical instrument lens (5) out of optical

element retainer (6) with attached optical instrument

window (7).

5-63