TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P 3-8. MAINTENANCE OF EYEPIECE ASSEMBLY (CONT). REASSEMBLY 1 Apply a 1/16-in. bead of sealing compound (item 10, appx C) to inside front (1) of cell assembly (2). NOTE For reassembly, lenses are to be positioned as shown in illustration. 2 Position lens (3) on spacer (4). 3 Position cell (2) over lens (3) and spacer (4). Press down carefully. 4 Turn cell (2) over and press down carefully on spacer (4) until lens (3) is seated in cell assembly (2). 5 Install field lens (5). 6 Install externally threaded ring (6) and tighten until lens (3), spacer (4), and field lens (5) are correctly seated. Do not overtighten. 7 Apply a small amount of sealing compound (item 10, appx C) in slots of externally threaded ring (6). 3-14