TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download
Page 428 of 552
TM 9-2350-311-34-2 CUPOLA RACE RING - CONTINUED b. Disassembly 1 2 3 4 5 Invert commander’s cupola (4). NOTE Note that slot on inside of each bearing ring are in line. Remove 12 washer assembled screws (10) and bearing shield (11). Remove 12 cap screws (12) and lower bearing ring (13). NOTE Some cupola race rings may have 128 white, cream, or yellow bearing balls and 128 pink or red bearing balls. Remove 252 white or cream bearing balls (14) and upper bearing ring (15). Remove 12 cap screws (16), 12 lockwashers (17), and outer bearing ring (18). Discard lockwashers. c. Inspection and Repair 1 Clean all parts of cupola race ring in accordance with standard maintenance procedures prescribed in Chap ter 2. NOTE Some cupola race rings may have 128 white, cream, or yellow bearing balls and 128 pink or red bearing balls. 2 Inspect 252 white or cream bearing balls (14) for scoring, burrs, or deformation. Replace as required. 3 Inspect bearing shield (11) and bearing rings (13, 15, and 18). Replace if cracked or distorted. 4 Inspect threads on bearing shield (11), bearing rings (13, 15, and 18), and commander’s cupola body (19). Retap if damaged. 10-4