TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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3-49 TM 9-1240-401-34&P 12 13 14 15 16 Turn collimating telescope holder (11) and collimating telescope (10) toward plumbline until reticle crossline intersection point is superimposed on plumbline. Revolve collimating telescope holder (11) and collimating telescope (10) until vertical reticle line is superimposed on plumbline. Secure collimating telescope (10) in this position. Turn collimating telescope holder (11) and collimating telescope (10) back until vertical reticle line is superimposed on vertical reticle line of collimating projector (6). If not superimposed, revolve collimating projector (6) until vertical lines are superimposed. Secure collimating projector (6) in this position. Set collimating projector (6) to 600-meter (650-yard) parallax setting. b. INSTALLING M118A2/M118A3 ELBOW TELESCOPE ON TELESCOPE FIXTURE 1 2 3 4 Check that mating surfaces are free of dirt, burrs, and other imperfections which may interfere with proper seating, then install M118A2/M118A3 elbow telescope (1) on telescope fixture (2). Insert tapered pin (3) through adapter block (4) and into M118A2/M118A3 elbow telescope (1), making certain the telescope spherical ring is seated in forward clamping block (5). Secure tapered pin (3). Position top holder of forward clamping block (5) with two special screws (6). Allow bearing of M118A2/M118A3 elbow telescope to rotate in clamping block.