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TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download

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TM 9-1240-401-34&P 4-20. COUNTER BOX ASSEMBLY MAINTENANCE INSTRUCTIONS - continued d. Assembly - continued 8 9 10 Insert lamp base potion of overlay assembly (29) into electrical lead (33). Position wire (30) in recessed area to accommodate protective cap (28). Apply adhesive to inside edge of protective cap (28). Install protective cap (28) and secure with two machine screws (27). Remove excess adhesive from outer edge of protective cap (28). e. Installation 1 Install eccentric stud (22) and setscrew (21). 2 Set the correction counter (41) and elevation counter (42) to 0. 3 Apply sealing compound around keyways and slot around eccentric stud (22), and install counter box assembly (20) on M145/M145A1 telescope mount using four flat washers (19), four new lockwashers (18), and four nuts (17). Hand tighten four nuts (17). 4 Loosen setscrew (21) and rotate eccentric stud (22) to obtain minimum backlash in the elevation handwheel (43). Tighten setscrew (21). 5 Tighten four nuts (17). 4-38 Change 1