TM 10-3930-669-34 WARNING • Mast assembly weighs 4,000 lbs (1,814 kg).  Attach suitable lifting device prior to removal to prevent possible injury to personnel. • All personnel must  stand  clear  during  lifting  operations.    A  swinging  or  shifting  load  may cause injury or death to personnel. (13) Using lifting device, assume weight of mast assembly (15). (14) Remove four screws (24) and washers (25) from two bearing clamps (26). (15) Remove mast assembly (15) from pivot and shift assembly (28). (16) Remove two caps (27) and two bearings (29) from mast assembly (15). (17) Using lifting device, lower mast assembly (15) to floor, carriage side up. 13-5