TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 6-9 a. SETTING UP INSPECTION FIXTURE 1 2 3 4 5 6 7 8 9 10 11 Place inspection fixture (1) on a clean level surface at a height suitable for comfortable viewing through collimating projector and collimating telescope. Mount reflecting mirrors (2) on inspection fixture (l), making sure that all mating surfaces are free of dirt, burrs, and other defects which would interfere with proper seating. Insert special test reticle 8599932-15 into collimat- ing projector (3). Install collimating projector (3) in collimator holding fixture (4) with vertical reticle line approximately vertical. Insert special test reticle 8599932-14 into auxiliary telescope (5). Install auxiliary telescope (5) in support (6) with vertical reticle line approximately vertical. Mount collimating telescope (7) in collimating tele- scope holder (8) on surface gage. Adjust height of collimating telescope (7) to height of auxiliary telescope (5) on inspection fixture (1). Suspend a plumbline approximately 10 feet (3.05m) from collimating telescope (7) viewing point. View plumbline through collimating telescope (7) and revolve collimating telescope (7) until vertical reticle line is in coincidence with plumbline image. Secure collimating telescope (7) in collimating tele- scope holder (8) to maintain the trueness of the vertical reticle line. Place collimating telescope (7) in line with auxiliary telescope (5).