TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 8 Position variable resistor housing (29) on rear housing (31) and secure with six new lockwashers (28) and six machine screws (27). 9 Install retaining strap (26) on purging valve stem (25). 10 Apply sealing compound to threads of purging valve stem (25) and install in eyepiece arm (6). 11 Install valve core (24) in purging valve stem (25). 12 Attach air valve cap (23) to the end of retaining strap (26) and thread air valve cap (23) onto purg- ing valve stem (25). 13 If removed, apply sealing compound to threads of plug (22) and install in eyepiece arm (6). 14 Install limit plate (21) and secure with two new Iockwashers (20) and two cap screws (19). 15 Apply grease (item 6, appx B) to shaft of bellows assembly (10). Screw bellows assembly (10) into tube (16). 16 Install tube (16) in unthreaded end of bracket (13). 17 Apply grease (item 7, appx B) to the threads of threaded ring (12) and install into bracket (13). 18 Apply grease (item 7, appx B) to new preformed packing (18) and install on bellows assembly (10). 19 Position bracket (13) over two headless straight pins (17) and install bellows assembly (10) in hole on eyepiece arm (6). 20 Secure bracket (13) in place with two new lock- washers (15) and two machine screws (14). 21 Install helical spring (11), lever spool (8), and ta- pered pin (9). 22 Install two setscrews (7). 3-13