TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P 6 Install support (4) on telescope test fixture (1). 7 Mount dioptometer (5) in V-block (6) and position on support (4) on telescope test fixture (1). 8 Aline vertical crosshair in dioptometer with plumbline. 9 Tighten screw (7). 3-21