TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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6-10 6-12. M42 PERISCOPE FINAL INSPECTION AND ADJUSTMENT-continued a. SETTING UP INSPECTION FIXTURE - continued 12 13 14 15 16 17 18 19 View auxiliary telescope (5) vertical reticle line through collimating telescope (7) and revolve auxil- iary telescope (5) until image of vertical reticle line is in coincidence with preplumbed vertical reticle line of collimating telescope (7). Using parallel bars, adjust height of collimating telescope (7) to height of collimating projector (3) on inspection fixture (1). Place collimating telescope (7) in line with collimat- ing projector (3). View collimating projector (3) vertical reticle line through collimating telescope (7) and revolve col- limating projector (3) until image of vertical reticle line is in coincidence with preplumbed vertical reticle line of collimating telescope (7). Using collimating projector (3) light source, autocol- Iimate auxiliary telescope (5), using support (6) adjusting screws (9), until reticle image is superim- posed on image reflected by the reflecting mirror (2). Look through collimating projector (3) and autocol- Iimate collimating projector using collimating pro- jector (3) support screws (10), until reticle image is superimposed on image reflected by reflecting mir- ror (2). Repeat steps 11 thru 15 to check that trueness of retitles has not been disturbed. Remove reflecting mirrors (2) from inspection fix- ture (1).