Crankshaft
Removing
1. R emove the cylidner heads and pushrods.
2. R emove the flywheel and flywheel housing.
3. R emove the fan, fan bearing, oil sump, tim-
ing gear housing and intermediate gear.
4. R emove the oil pump and all pistons and con-
necting r ods.
5. R emove al l main bearing caps and carefully
lift out the crankshaft using a lifting strap or
the like which will not damage the shaft jour-
nals.
6. R emove all main bearing halves and thrust
washers on the 7th main bearing.
Checking and grinding
1. Measure the crankshaft pivot pins. Use a
micrometer to take measurements at two
points 90 degrees apart.
If either of these diameters is below the spec-
ified lower limit, regrinding of the crankshaft
or the fitting of a r eplacement crankshaft
should be considered.
The oil pressure should also be taken into
account, which is in turn also affected by
wear in the main and big-end bearings.
2. W hen regrinding, stated undersiz es must be
complied with. T here are bearings adapted to
these dimensions.
It is important that the fillet radius of the
pivot pins is correct.
After grinding the pivot pins, the oil hole ori-
fices at the bearing surfaces should be
rounded and polished.
To Next Page
Loading...