TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 19 20 21 22 23 24 25 26 27 Install two straight headless pins (42 and 43) in knob (29). Install ratchet shield (40), spring washer (39), dial ratchet (38), keyed ratchet (37), concave washer (36), and concave washer (41 ) in elevation slide (21). Using fabricated spanner wrench tighten threaded ring (35) in elevation slide (21). Apply grease (item 6, appx B) to worm gear of ele- vation shoulder screw (28). Install flat washer (32). Install elevation shoulder screw (28) through mount and knob (29) by turning elevation shoulder screw (28) and knob (29) clockwise. Install setscrew (25) in mount to secure elevation shoulder screw (28). If the tapped hole is not pre- sent in the elevation bracket, the hole must be drilled and tapped and setscrew (25) installed. Install setscrew (26) in elevation slide (21) to se- cure threaded ring (35). Install new self-locking nut (27). 2-13