TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM 9-2815-202-34 4-25. IDLER GEAR REPLACEMENT (Cont) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) Mount idler gear assembly (3) in soft jaw vise. Install retainer (8) and six bolts (7) on idler gear assembly (3). Torque bolts to 24-29 Ib-ft (33-39 N-m). Mount two test fixture plates (17 and 18) on idler gear (3) with bolt (19) and nut (20). Torque to 80-90 Ib-ft (108-122 N-m). Mount test fixture plate (21 ) to gear assembly (3) with three bolts (22), three Iockwashers (23), and three flat washers (24). Torque bolts to 25-40 Ib-ft (34-54 N-m). Secure plate (18) in jaws of vise. Wrap Iintless cord several times around gear assembly (3) and attach to spring scale. Pull gear assembly (3) at least three times and record pull required to start moving gear. NOTE Pull must be more than 0.5 Ibs (0.23 kg) and less than 4.0 Ibs (1.8 kg) and fluctuation less than 2.7 Ibs (1.22 kg) to assure idler gear and bearing assembly are satisfactory for use. Secure gear assembly (3) in soft jaw vise. Remove three bolts (22), three Iockwashers (23), three flat washers (24), and test fixture plate (21). Remove nut (20), bolt (19), and two test fixture plates (17 and 18). 4-91