TM 9-2350-277-34INSTALL COMMANDER’S CUPOLA ARMOR SHIELDS (M113A3 AND M1064A3 ONLY) —Continued0088 005. Drill four holes using 27/64 (11 mm) drill. Drill to a maximum depth of 1-1/4 (3 cm). Tap with a 1/2-13 UNC tap to aminimum depth of 7/8 (22 mm).6. Remove locknut (1), two flat washers (2), and cap screw (3) that secure hook (4), spring (5), and two spacers (6) oncupola hatch. Discard hook. Keep all other parts.7. Place new hook (4), spring (5), and two spacers (6) on cupola hatch. Secure with two flat washers (2), cap screw (3), andlocknut (1).8. Remove locknut (7) and flat washer (8) that secure bumper (9) and flat washers (10) to cupola hatch. Remove bumperand washers. Keep washers. Discard locknut.9. Place new bumper extension bracket (11) on cupola hatch with welded end up. Secure with new cap screw (12), flatwasher (13), and locknut (14).10. Use flat washers (10), as needed, to compress bumper 1/4 inch (6 mm) when cover is open and latched. Place flatwashers (10) and bumper (9) on bracket (11). Secure with flat washer (8) and new locknut (7).NOTEGun shields are large and bulky. Get an assistant to help you.11. Install curved doors (15) in guide channels of shields (16) and (17). There are two doors in each shield. Install four clips(18) to secure doors open. Deform clips to turn freely around loop on doors.0088 00-2
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