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
