TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311-20-1 11 Install nut (23) and adjusting screw (22) onto backrest supporl (24), 12 Install backrest support assembly (13), new self-locking nut (20), and screw (21). 13 Attach bracket (18) to backrest frame (19) with screw (17), two flat washers (15 and 16), and new self-locking nut (14). 14 Install backrest assembly (12) onto backrest support assembly (13). 15 Install headed pin (11), chain (10), hook (9), and new cotter pin (8) onto bracket (1 8). 11-9