TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 91240-400-34&P NOTE Etching which reads "8 IN. HOW. M110A1 (MILS)" on the M139 elbow telescope reticle must be positioned at the top. 3 Look through the M139 elbow telescope (4) and rotate reticle (5) with scribe through screw hole until the N line is superimposed on the verticle line (6) of collimator projector (1) within 0.5 mil. 4 If reticle (5) does not rotate freely, remove setscrew (7) and eyepiece assembly (8). Loosen retaining ring (9). Install eyepiece assembly and setscrew (7). 5 Adjust remaining three setscrews (3) securing reticle by rotating with scribe until the N line in reticle of the M139 elbow telescope (4) is superimposed on the vertical line (6) of collimator projector (1) reticle within 0.5 mil. 6 Remove setscrew (7) and eyepiece assembly (8), and tighten retaining ring (9). 7 Install setscrew (3). 8 Install eyepiece assembly (8). Install setscrew (7) and tighten. 3-25