TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 5-26. M117/M117A2 PANORAMIC TELESCOPE FINAL INSPECTION AND ADJUSTMENT - continued I a. SETTlNG UP AZIMUTH TESTING FIXTURE - continued I 21 22 23 24 25 26 27 28 29 30 31 32 Install reflecting mirror assembly (14) on alinement gage assembly (13). Remove lamp assembly (17) and diffusion disk from collimating projector (11). Replace lamp assembly (17) with partial reflector at approximately a 45° angle. Sight through collimating projector (11) and adjust collimating projector (11) and fixture adapter (7) until image of test reticle, as reflected by reflecting mirror assembly (14), is superimposed on test reticle. Adjust collimating projector (11) in elevation and fixture adapter (7) in defelction. Clamp fixture adapter (7) in place with three cam- Iock screws (18). Remove alinement gage assembly (13) from fixture adapter (7). Set collimating projector (11) to 88 yards (80 me- ters). Install diffusion disk on collimating projector (11). Install lamp assembly (17) on collimating projector (11). Install M117/M117A2 panoramic telescope (19) on fixture adapter (7) and secure with two latches (20). NOTE Ensure that dioptometer (21) is adjusted to present a sharp, clear image of the diop- tometer reticle. Install dioptometer (21) in dioptometer holder (22) on surface gage (23). Adjust height of dioptometer (21) to height of tele- scope eyepiece (24). 5-50