TM-9-2350-261-34 Direct and General Maintenance Manual M113A2 M577A2 M1064 M1068 M1059 M901A1 Download
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TM 9-2350-261-34 REPAIR COMMANDER’S CUPOLA (M113A2, M1059, AND M1064 ONLY) — Continued 0040 00 ASSEMBLY NOTE If one ball bearing or separator needs to be replaced, all ball bearings and separators must be replaced. 1. Install inner race (8) on hatch (4). C A U T I O N Improper installation will cause binding, resulting in bearing failure. Bearing block (7) radius surface must face toward cupola center. Do not use talcum or other powder to reduce friction. When talcum is exposed to moisture, a chalky substance will form, causing binding. NOTE Alternately, install 24 separators (6) and 23 ball bearings (5) between bearing blocks (7). One separator (6) is to be installed on each side of each bearing block (7). A maximum number of sets (one ball and one spacer per set) is needed between any two blocks. The number of sets in each space between blocks must not differ by more than one set. 2. Install 140 ball bearings (5), 146 separators (6), and six bearing blocks (7) in groove of inner race (8). NOTE The outer race and inner race must be aligned correctly so that the traverse lock pin will fit. 3. Install outer race (3) on hatch (4). Place large unthreaded hole in outer race (3) directly above largest unthreaded hole in inner race (8). 4. Secure outer race (3) to inner race (8) with 18 new lockwashers (2) and socket head screws (1). TIGHTEN SCREWS TO 25-34 LB-FT (34-46 N·M) TORQUE. Use torque wrench. FOLLOW-THROUGH STEPS 1. Install commander’s cupola (WP 0039 00). END OF TASK 0040 00-2