TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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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