Westerbeke Universal M-50 - Checking Connecting Rod Alignment; Checking Crankshaft Alignment

CHECKING CONNECTING ROD ALIGNMENT
1. Remove the connecting rod crank pin bearing and tighten the rod bolts.
2. Set the connecting rod to a connecting rod aligner.
3. Place the gauge on the piston pin. Measure the gap between the pin of the gauge and the flat
surface of the aligner.
4. If the measurement exceeds the allowable limit, replace
IMPORTANT: Because the 1.0. of the connecting rod small end bushing is used as the basis
for this check, check it is not worn beforehand. See engine specifications.
CRANKSHAFT
CHECKING CRANKSHAFT ALIGNMENT
1. Place V blocks on the surface plate, and support the journals at both ends of the crankshaft
on the V blocks.
2. Set a dial gauge to the central journal.
3. Read the dial gauge while rotating the crankshaft slowly. Crankshaft flexure is half of the
reading.
4. If the reading exceeds the allowable limit, replace. See engine specifications.
123