ARMY TM 9-2815-257-24 AIR FORCE TO 38G1-128-2 MARINE CORPS TM 10155A/2815-24/3 5-10 5-7.  CRANKSHAFT ASSEMBLY MAINTENANCE  -  cont. C.    INSPECTION. 1. Inspect flywheel (10, Figure 5-1) for cracks, deformation, or obvious damage.  Inspect for broken, chipped, or cracked flywheel fins.  Replace flywheel if damaged. 2. Inspect flywheel housing seal (6) for deterioration or permanent set.  Replace if damaged or deformed. 3. Inspect  crankshaft  (5,  Figure  5-5)  for  cracks,  deformation,  or  obvious  damage.    Replace  crankshaft  if cracked or damaged. 4. Inspect gears (7, 8) for broken, chipped, or worn teeth.  Replace gears and crankshaft (5) as an assembly if a gear is damaged or worn. 5. Measure  the  outside  diameter  (OD)  of  crankshaft  crank  pin  (Figure  5-3).    OD  must  be  1.4134  inches (35.90 mm), minimum.  Replace crankshaft assembly if out of limits. 6. Measure the OD of crankshaft where crankshaft mates to crankcase cover plain bearing (Figure 5-3).  OD must be 1.3744 inches (34.91 mm), minimum.  Replace crankshaft assembly if out of limits. 7. Measure the OD of crankshaft where it mates to flywheel side ball bearing (Figure 5-3).  OD must be     1.3782    inches    (35.01    mm),    minimum.   Replace crankshaft assembly if out of limits. 8. Bearing (6, Figure 5-5) is press fit onto crankshaft (5).      Check   bearing   for   looseness.      Replace crankshaft assembly if bearing is loose. 9. Inspect  bearing  (4)  for  discoloration,  separation, or   any   other   obvious   damage.      Remove   and replace bearing if damaged in any way. Figure 5-3.  Crankshaft Inspection