TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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5-30 TM 9-1240-401-34&P 5-17. M117/M117A2 PANORAMIC TELESCOPE MAINTENANCE INSTRUCTIONS - continued I c. Assembly - continued 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Apply grease (item 6, appx B) to plunger (27). Install plunger (27) with hole alined for installation of worm shaft (26). Apply grease (item 6, appx B) to worm gear and bearing surface of worm shaft (26). Using adjustable spanner wrench, install worm shaft (26) and related parts into upper housing (12) and rotate wormshaft assembly to engage with worm gear in M117/M117A2 panoramic telescope. Apply grease (item 6, appx B) to spring (24). Install spring (24) and plug (23). Apply grease (item 7, appx B) to new preformed packing (13) and install on lower housing (11). Install lower housing (11 ) on upper housing (12) and secure with six new Iockwashers (6, 8, and 10) and six cap screws (5,7, and 9). If removed, install headless straight pin (14). Install correction counter cover (ref. para 5-13). Install gunner’s aid knob and plate (ref. para 5-13). Install azimuth knob (ref. para 5-13). Apply grease (item 7, appx B) to new preformed packing (39). Install new felt mechanical washer (40), preformed packing (39), and coupling (38) on upper housing (12). Push to seat cap (3) on upper housing (12). Rotate cap (3) by turning azimuth knob and install 50 balls (4). Install plate (2) and two machine screws (1).