TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
Page 107 of 344
TM 9-1240-400-34&P 6 Install access cover (10). 7 Install cushioning pad (11) and prism (12). 8 Install cushioning pad (13). 9 Install optical element holder (14) and spring tension clip (15). 10 Apply a 1/16-in. bead of sealing compound (item 10, appx C) in recess of cover (2) and install. 11 Apply sealing compound (item 10, appx C) under heads of two screws (16) and install. 12 Install reticle assembly (17) with slot (18) in cell opposite observation window (5). 13 Install externally threaded ring (19) and tighten just enough to keep reticle assembly from being loose. NOTE Screws will be tightened during reticle plumb/collimation inspection, and adjustment will take place in final inspection procedures. 14 Install four setscrews (20), but do not tighten. 15 Install setscrew (21), but do not tighten. 3-11