TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 2 3 4 5 6 7 9 10 11 13 14 If headless straight pin (21) was removed, redrill using No. 54 (.055) drill; ream for drive fit in mount (9). End on headless straight pin (21) must pro- trude far enough into hole in mount (9) to engage slot in end of level (16) when installed. Install level (16), making sure that slot in end of level engages headless straight pin (21). Install cam (15), holder (14), and threaded ring (13) in front of level (16). Do not tighten threaded ring (13) until adjustment of level (16) has been com- pleted (ref. p 3-30). Apply sealing compound (Item 13, appx B) to mount (9); then install sleeve spacer (12). Apply sealing compound (Item 13, appx B) under rim of telescope subassembly (11) and install into mount (9) with windows alined. Apply sealing compound (item 15, appx B) to out- side threads of holder (10). Install holder (10) in mount (9), keeping windows of telescope subassembly (11) and mount (9) alined. Install incandescent lamp (8) in holder (10). Apply sealing compound (item 13, appx B) to threads of two cap screws (22). Install light conduc- tor (23) and secure with two cap screws (22). If headless straight pins (20) were removed, redrill using a No. 54 (0.055) drill; drill 0.450 inch (11.43 mm) deep. Ream for drive fit in mount (9) and slip fit in mirror (19). Install mirror (19) over headless straight pins and secure with two new Iockwashers (18) and two cap screws (17). Apply adhesive to groove on bottom of mount (9) and to one side of new preformed packing (27). Install preformed packing (27) in groove. 3-29