TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P 16 Remove six screws (30) and window frame (31). 17 Carefully remove excess sealer from window (32). 18 Carefully remove window (32) from rotating head (13). CLEANING Clean all parts per TM 9-254. REPAIR Repair is by replacement of authorized parts as required. Refer to appendix B. REASSEMBLY 1 Apply a coat of sealing compound (item 10, appx C) to edge of window (1). 2 Carefully install window (1) in rotating head (2). 3 Apply sealing compound (item 10, appx C) to threads of screws (3). 4 Install window frame (4) and six screws (3). 5 Apply a coat of silicone compound (item 11, appx C) to new preformed packing (5) and install new preformed packing in groove of prism (6). 6 Install prism (6). 7 Using adjustable spanner wrench, install externally threaded ring (7). 8 Apply sealing compound (item 10, appx C) to threads of two setscrews (8). 9 Install two setscrews (8). 2-25