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 TM 5-2010-205-14
1. Measure bore (A) in bearing for piston pin. The minimum dimension is 1.5007 and the maximum dimension is
1.5013 inch.
2. Measure bore (B) in connecting rod for bearing. The minimum dimension is 2.9413 and the maximum dimension is
2.9423 inch.
NOTE
Nuts torque procedure: Torque nuts to 30 lb.-ft. and then turn 60 degrees more.
3. Measure distance (C) between center of bearing for piston pin and center of bearing for crankshaft journal. Minimum
dimension is 7.899 and the maximum dimension is 7.901 inch.
4. Measure diameter (D) of piston pin. The minimum dimension is 1.4997 and the maximum dimension is 1.5001 inch.
NOTE
Maximum permissible clearance between bearing and piston pin is .003 inch.
5. Inspect top ring (1).
a. Measure width of groove in piston for piston ring. The minimum dimension is .1285 and the maximum
dimension is .1295 inch.
b.
Measure thickness of piston ring. The minimum dimension is .1240 and the maximum dimension is .1255 inch.
c. Measure clearance between groove and piston ring. The minimum clearance is .0030 and the maximum
clearance .0055 inch.
6. Inspect oil control ring (2).
a. Measure width of groove in piston for piston ring. The minimum dimension is .1100 and the maximum
dimension is .1110 inch.
b.
Measure thickness of piston ring. The minimum dimension is .1080 and the maximum dimension is .1090 inch.
c. Measure clearance between groove and piston ring. The minimum clearance is .0010 and the maximum
clearance is .0030 inch.
REPAIR
Repair is limited to the replacement of defective parts.
REPLACEMENT
1. Remove carbon from top inside surface of the cylinders.
6-34
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