TM 9-2350-277-34REPAIR COMMANDER’S CUPOLA (M113A3, M1059A3, M1064A3, AND M58 ONLY) —Continued0051 0018. Place machine gun mount (18) on commander’s cupola. Secure with four washers (17) and screws (16).NOTEInstall washer(s), as needed, to compress bumper 1/4 inch (6 mm) when hold-open hook isengaged.19. Install washer(s) (15) and bumper (14) in cupola bracket. secure with washer (13) and nut (12).20. Align hook (10), two spacers (9), spring (8) and two washers (7) with cupola bracket. Secure with screw (11) andlocknut (6).21. Install hook (4) in safety pin (5) and chain (2). Squeeze both ends of hook to secure.0051 00-15
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