TM  10-3930-638-24&P 4-2.   ENGINE   MAINTENANCE   (cont) d. Crankshaft and Main Bearings (cont). 5 STEP LOCATION ITEM ACTION REMARKS INSPECTION (cont) NOTE (cont) When connecting rod journals are worn more than 0.002 inch, grind  undersize  to  following  dimensions: Outer  Diameter Grind Undersize  (inch) to  (inches) 0.002 2.2460 to 2.2470 0.010 2.2380 to 2.2390 0.020 2.2280 to 2.2290 0.030 2.2180 to 2.2190 If one or more journals are to be ground, then grind all journals. e. Crankshaft connect- Measure Measure 90 degrees from first measurement ing rod journals for  out-of-roundness.  If  out-of-roundness exceeds 0.0005 inch, regrind journal NOTE If crankshaft was reground, repeat step 5 of inspection. 6 Crankshaft  gear  (9) Inspect Inspect  for  cracks,  damage,  missing  or broken teeth, scoring, pits and wear. If any of these conditions observed, replace gear 7 Center main Center main bear- a. Remove Slide  out bearing  cap  (6) ing  liners  (13) b. Inspect Inspect for cracks, scoring, pitting, flaking, or signs of overheating. Check liner back for bright spots. Replace if any of these conditions  observed c. Measure thrust Use micrometer. Replace if thickness less surface  thick- than 0.1025 inch ness 4-29