TM 10-3930-659-34 5-4. ENGINE MAIN BEARINGS, THRUST BEARING, AND CRANKSHAFT REPLACEMENT (Con’t). c.           INSTALLATION 1. Install woodruff key (14) on crankshaft (9). 2. Heat spur gear (11) to 360°F (1820C) in accordance with TM 9-214. 3.    Position spur gear (11) on crankshaft (9). 4.    If removed, install dowel pin (12) on crankshaft (9) using stud remover and setter. 5.    Position  seven  upper  main  and  thrust  bearings  (13)  on  engine  block  (5).    Ensure  that  tangs  on  bearings  fit  in locking grooves in engine block and oil holes in upper bearings line up with oil passages in engine block. 6.    Apply lubricating oil (Item 39, Appendix B) to upper bearings (13) and crankshaft journals (10). WARNING Use extreme caution when handling heavy parts.  Lifting device is required when parts weigh over 50 lb (23 kg) for a single person lift, over 100 lb (45 kg) for a two person lift, and over 150 lb (68 kg) for a three or  more  person  lift.    Keep  clear  of  heavy  parts  supported  only  by  lifting  device.    Failure  to  follow  this warning may cause serious injury or death to personnel. CAUTION · DO NOT install crankshaft by hand.  Use a suitable lifting device or parts may be damaged. · When  installing  crankshaft  in  engine  block,  ensure  that  crankshaft  does  not  hit  against  engine block.  Crankshaft hitting against engine block may damage parts. · Ensure that bearing faces are not damaged when installing crankshaft. 7.    Using a suitable lifting device, position crankshaft (9) in engine block (5). 5-42