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) (4) Lay outer bearing cup (14), numbered side down, on top of outer spacer ring (1 5). Using a steel plate under ram of arbor press, press bearing cup into bore of gear until seated against (5) (6) (7) • • (8) (9) outer-spacer ring. Place inner bearing cone (9), outside face down, on parallel bars on bed of arbor press. Press idler gear hub (11) into inner bearing cone until inner hub mounting face is flush with inner bearing cone outside face. Install inner spacer ring (12) on idler gear hub so oil hole in hub is 180° from gap in inner spacer ring. Place idler gear (16) and cups over hub (11) and inner bearing cone. Place outer bearing cone (10) over hub. CAUTION Inner bearing cone and hub mounting face must be supported so bearing rollers are not loaded during this assembly operation. Turn idler gear while installing outer bearing cone on hub to prevent damage. Press outer bearing cone (10) onto hub while rotating idler gear (16) to seat rollers. Hold hub (11 ) and turn gear assembly (3) to see if binding occurs. NOTE Bearings must be clean and lubricated with engine oil before checking preload. Work in bearings by rotating gear back and forth several times. 4-90