TM 9-2815-225-34&P 3-37.  CRANKSHAFT REPAIR (Contd) LOCATION/ITEM ACTION REMARKS b.  Inspection (Contd) CAUTION When repairing threads, be careful not to cause damage to crankshaft oil seal area. 23.  Crankshaft (2) Inspect for the following: a.  Cracks, breaks, damage, or Discard if cracked, broken, wear. damaged, or worn. b.  Surface scratches or burrs. Remove with fine-grit emery cloth. c.  Damaged or distorted Repair with suitable thread threads at front and/or rear. chaser. d.  Grooved or worn rear oil seal Clean with fine-grit emery cloth. contact area (10) or front oil If unable to remove groove, send seal contact area (11). crankshaft (2) to a specialized repair station. e.  Outside diameter of rear oil Discard crankshaft (2) or send to seal contact area (10) is 5.998- specialized repair station if rear 6.000 in. (152.349-152.4 mm). oil seal contact area (10) is not within stated range. f.  Outside diameter of front oil Discard crankshaft (2) or send to seal contact area (11) is 3.625- specialized repair station if 3.626 in. (92.075-92.100 mm). front oil seal contact area (11) is not within stated range. g.  Rod bearing journal diameter Measure six rod bearing journal (13) is a minimum diameter of diameters (13).  Discard crankshaft 3.1235 in. (79.337 mm) up to a (2) or send to a specialized repair maximum diameter of 3.125 in. station if any of six rod bearing (79.375 mm).  Measure at three journal diameters (13) are less and six o'clock position. than 3.122 in (79.299 mm). h.  Main bearing journal diameter Measure seven main bearing (12) is a minimum diameter of journal diameters (12).  Discard 4.4985 in. (114.262 mm) up to a crankshaft (2) or send to a maximum diameter of 4.500 in. specialized repair station if any (114.3 mm).  Measure at three of the seven main bearing journal and six o'clock position.  Wear diameters (12) are less than limit is 4.4975 in. (114.237 mm). 4.4975 in. (114.237 mm). 3-166