TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM9-2815-202-34 4-41. BLOWER REPAIR (Cont) (31) (32) (33) (34) (35) (36) (37) (38) Rotate rotors (6 and 7) to bring flat in spline on shafts in alinement and facing left. Install original number and thickness of shims (18) on shafts of rotors (6 and 7) that were removed at disassembly. Lubricate serrations of shafts of rotors (6 and 7) with engine oil. Place teeth of rotor gears (12 and 17) so missing teeth on inside of gears are alined and facing same direction as missing teeth on shafts of rotors (6 and 7). Using a soft-headed hammer, drive gear (12) on shaft of rotor (7) and gear (17) on shaft of rotor (6). Install bolt (13) into end in shaft of rotor (7). Install spacer (16), shaft (14) and deflector (15) in shaft of rotor (6). Place folded rag between rotors to prevent gears (12 and 17) from turning. Torque bolt and shaft to 100-110 Ib-ft (136-150 N-m). Reverse blower assembly. Install spacer (27), disc (26), key washer (25) and bolt (24) to rotor (7). Aline tang on key washer with groove in disc. Torque bolt to 55-65 Ib-ft (75-88 N-m). Bend one tang of key washer into groove in disc and two tangs against side of bolt head. Remove rag from rotors. Install four 5/16-18x1 7/8-inch bolts with flat washers through holes in each end plate (top and bottom) to blower housing. Torque bolts to 13-17 Ib-ft (18-23 N-m) (bolts are temporarily securing blower housing to end plates to determine clearance between rotors and end plates). 4-244