Westerbeke 6.5KW - Page 49

Checking Connecting Rod Bearing
1. Check the connecting rod bearing
carefully and replace if it is
worn, scored or flaked.
2. Check the connecting rod bearing
clear ance with a "plastigauge".
If it exceeds the limit, correct
the crankpins with a suitable
grinder and use with suitable
undersize bearings.
NOTE: Tighten the connecting
rod cap bolts to the specified
torque.
Cap tightening torque: 3.0 - 3.5 kg-m (22 - 25 Ib-ft)
Bearing clearance:
Standard: 0.024 - 0.048 mm (0.0009 - 0.0019 in)
Limit: 0.10 mm (0.0039 in)
Checking Crankshaft
1. Check the crankshaft for cracks
or other damage. If necessary,
replace the crankshaft.
2. Check to see that the oil pas-
sages of the crankshaft are
open. If any clogs are found,
remove them with compressed air
or a suitable wire.
3. Check the cr ankshaft for wear.
If it exceeds the limit, correct
the crankshaft with a suitable
grinder and use with suitable
undersize main bearings.
Rt=O.l46/0.157"(.J, "tP,99mm)
Rz'O.l26/0.142"(J.2tJ/J,6Imm)
NOTE: Measure the diameter of each of the crankpins and main
journals at two points (the front and rear portions) at 90 degrees
to the crankshaft axis, as shown in the figure.
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