TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P 5.1-14. M15 QUADRANT MAINTENANCE INSTRUCTIONS - continued c. Assembly - continued 16 17 18 19 20 21 22 23 24 25 NOTE Both correction counters and elevation counter must be zeroed prior to installing knob assembly. If removed, install two straight pins (23). Apply grease (item 6, appx B) to new preformed packing (24) and install into groove (25) of cover assembly (14). Position knob assembly (26) at the midway point between stops (approximately 5-1/2 turns from one stop). Install base (27) on knob assembly (26). Install knob assembly (26) with base (27) on cover assembly (14) and secure with three screws (28) and three new lockwashers (29). If numbers of correction counter (30) do not aline within 1/16 inch (1.588 mm), adjust two setscrews (31) to aline numbers. Check that upper correction counter (30) registers at least +50 mils when knob assembly is turned clockwise to stop. Check that lower correction counter (30) registers at least -50 mils when knob assembly is turned counterclockwise to stop. If removed, install spring tension clip (32) and plate spacer (33) on housing and secure with two screws (34). If removed, install identification plate (35) and two screws (36) on housing. If removed, install instrument light (37). 5.1-22 Change 1