TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P 2-13. MAINTENANCE OF OPTICAL INSTRUMENT WORM ASSEMBLY, OPTICAL INSTRU- MENT COLLECTIVE CELL ASSEMBLY, OPTICAL INSTRUMENT OBJECTIVE CELL ASSEMBLY, AND RETICLE ASSEMBLY (CONT). REMOVAL/DISASSEMBL Y (CONT) NOTE Measure distance between top of gear to cell assembly lens and record for reassembly. 3 Remove setscrew (7). Remove cell assembly (8) from gear (3) using fabricated spanner wrench (item 7, appx D). NOTE Step 4 is written and illustrated for disassembly of cell assembly (8587296). 4 Remove retainer (9) and lens (10) from optical element cell (11) using tubular spanner wrench (7597648). 5 Scribe a mark on gear (3) and reticle assembly (12). 6 Remove three screws (13) and reticle assembly (12) from gear (3). NOTE Step 7 is written and illustrated for disassembly of reticle assembly. 7 Remove setscrew (14), retainer (15), and reticle (16) from spur gear (17) using tubular spanner wrench (7597643). CLEANING Clean all parts per TM 9-254. REPAIR Repair is by replacement of authorized parts as required. Refer to appendix B. 240