23833A273 10/08/14
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This procedure can be followed only where the amount
of sanding does not reduce the normal diameter of the
crank pin.
Worn or corroded crank pins can be ground and
polished down to .030" under the size when the crank
was new. The undersize bearing halves are made
especially for turned down crankshafts.
If the surface is badly damaged, the crankshaft can often
be salvaged by metalizing the crank pins, regrinding and
polishing to the original diameter.
When assembling bearings on the crankshaft, an oil seal
expander thimble should be used at the end of the shaft.
A thimble of this type will cause the lip of the oil seal to
gradually expand up to the shaft diameter allowing it to
slip onto the shaft without turning or damaging the seal
in any way. A slight nick or cut in the lip can damage a
seal enough that it will not retain the oil properly.
