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Scania CV AB 2011, Sweden
105
Machining crankshafts
1 Measure the diameter on the crankshaft
bearing journals using a micrometer as
illustrated. Measure at several points around
the bearing journal. If any of these
diameters is lower than the minimum
indicated limit, regrinding of the crankshaft
should be considered. Oil pressure should
also be checked, as it is affected by such
factors as wear in the main bearings and
connecting rod bearings.
2 When regrinding, keep to the specified
minimum dimensions. Suitable bearings are
available for these sizes. It is important that
the fillet radius of the bearing journals is
correct. Check the fillet radius using a
template as illustrated.
3 After grinding the bearing journals, round
off and polish the oil hole openings on the
bearing surfaces.
Crankshaft
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