TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
Page 46 of 344
TM 9-1240-401-34&P 2-11. M146 TELESCOPE MOUNT MAINTENANCE INSTRUCTIONS - continued c. Assembly - continued 6 7 8 9 10 11 12 13 14 15 16 17 18 Install one stud (34) and two studs (33). Apply grease (item 7, appx B) to new preformed packing (49) and install in elevation slide (21). Apply grease (item 7, appx B) to new preformed packing (50) and install in threaded ring (35). Install threaded ring (35) in elevation slide (21). Apply grease (item 6, appx B) to machined sur- faces of elevation slide (21) and mount and install elevation slide in mount. Slide retainer plate (31) over studs (33 and 34). Install and adjust three new self-locking nuts (30) so that elevation slide (21) moves freely without binding. A maximum of 0.002-inch (0.005-mm) clearance must be maintained on machined sur- faces between bottom of elevation slide (21) and elevation bracket (79). NOTE Elevation shoulder screw should be temporar- ily installed prior to installation of knob and related parts to ensure that elevation slide moves freely without binding. Install cover assembly (22) using two new Iockwashers (24) and two cap screws (23). Apply grease (item 6, appx B) to disk (48) and in- stall on knob (29). Install elevation dial (47) with numbers inverted on knob (29). Install spring washer (46) and round nut (45) on knob (29). Tighten round nut (45) enough that elevation dial (47) fits snug on knob (29). Install setscrew (44) in round nut (45). 2-12