TM 9-2815-225-34&P 3-37.  CRANKSHAFT REPAIR (Contd) LOCATION/ITEM ACTION REMARKS b.  Inspection (Contd) 7.  Seven retaining rings (5) Inspect for wear, out-of-round, or Discard if worn, cracked, or cracks. out-of-round. NOTE It is unnecessary to remove crankshaft gear for inspection; remove only if excessively worn or damaged. 8.  Crankshaft gear (7) Inspect for the following: a.  Worn, cracked, or broken Discard if cracked, worn, or gear teeth. broken.  Refer to step 8c for removal. b.  Loose or worn keyway (9) in Remove.  Refer to step 8c. area of gear-to-crankshaft key (6). c.  Remove from crankshaft (2).   Use a suitable puller and wrench. Remove only if necessary due to damage.  Discard crankshaft gear (7) and gear-to-crankshaft key (6) after removal. d.  Buff all minor nicks and scratches using crocus cloth. e.  Repair threads in threaded holes as required. f.  If inspection shows crankshaft (2) is worn and must be reground and magnetic inspection reveals suitable for regrinding, grind crankshaft to next standard undersize. 9.  Crankshaft keyway (9) Inspect only if gear (7) and key (6) are removed for the following: a.  Looseness, wear, or damage.   Discard crankshaft (2) or send to specialized repair station if worn, loose, or damaged in keyway (9) area. b.  Width of keyway (9).   Discard crankshaft (2) or send to specialized repair station if width exceeds 0.375 in. (9.525 mm). 10.  Crankshaft gear step (8) Inspect for the following: a.  Wear, grooves, or damage.   Discard crankshaft (2), or send to specialized repair station, if worn, grooved, or damaged. b.  Outside diameter should Discard crankshaft (2), or send to measure no less than 3.7607 in. specialized repair station, if (9.5522 cm). outside diameter is less than 3.7607 in. (9.5522 cm). 3-158