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) e. Installation (1) (2) (3) (4) Aline timing marks on camshaft gear (25) and crankshaft gear (26) with timing marks on idler gear assembly (3). Slide idler gear assembly (3) into position until crankshaft gear and camshaft gear are fully meshed. Rotate gear hub (11 ) until dowel alines with hole in end plate. Tap hub until it seats against end plate. Install bolt (1) and flat washer (2) securing idler gear assembly (3) to cylinder block. Torque bolt to 80-90 Ib-ft (108-122 N-m). NOTE Backlash can only be checked with cylinder head removed, (5) Mount dial indicator on end plate and check backlash between idler gear assembly (3) and mating gears. Minimum backlash is 0.002 in.. Maximum backlash is 0.008 in. for new gears and 0.010 in. for used gears. NOTE Effective up to engine number 8VA- 349267, a dummy hub was installed opposite idler gear hub to fit the original flywheel housing. (6) Install dummy hub (6) on end plate. Install bolt (4) and flat washer (5). Torque bolt to 80-90 Ib-ft (108-122 N-m). END OF TASK FOLLOW-ON MAINTENANCE Para Description 4-24 Install flywheel housing 4-92