TM-9-1240-400-34-P

TELESCOPE; PANORAMIC: M115, ELBOW: M139, MOUNT: M138 AND M137

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

OCTOBER 1993

TM-9-1240-400-34-P - Page 106 of 344

TM 9-1240-400-34&P

3-7.

MAINTENANCE OF M139 ELBOW TELESCOPE (CONT).

CLEANING

Clean all parts per TM 9-254.

REPAIR

1

Eyepiece assembly is a repairable assembly; refer to page 3-12.

2

Reticle assembly is a repairable assembly; refer to page 3-15.

3

Objective cell assembly is a repairable assembly; refer to page 3-16.

4

Repair is by replacement of authorized parts as required.

Refer to appendix B.

REASSEMBLY

1

Install identification plate (1) on cover (2) using

two screws (3).

2

Install screw (4).

3

Install window (5) and observation window (6).

Apply sealing compound (item 10, appx C) to

outside edges.

4

Install objective cell assembly (7) in body (8).

NOTE

Setscrew will be tightened during

parallax inspection, and adjustment will

take place in final inspection procedures.

5

Install setscrew (9), but do not tighten.

3-10