5. Inspect the oil passage for debris and clean thoroughly
before proceeding.
6. Press the wrist pin back into the crosshead and wrist
pin bushing and reinstall retainer rings. NOTE: The fit
between the wrist pin and bushing is tighter than on
lubricated air compressors and combustion engines.
5 .7 .2 Replacing Connecting Rod Bearings
The semi-circular connecting rod bearings are easily
replaced by removing the connecting rods. Make sure
the indentations in the connecting rod bearing and
connecting rod line up when installing the new bearings.
MAKE SURE THE ARROW AND/OR ALIGNMENT NOTCH
ON CONNECTING ROD AND CAP ARE ALIGNED. BE
SURE THE PREVIOUSLY MARKED CONNECTING ROD
AND CAP ARE KEPT TOGETHER.
Before reinstalling the crosshead/connecting rod
assemblies, make sure the crankshaft throw and bearing
surface are clean and lubricated. Tighten the connecting
rod nuts to the torque value listed in Appendix B.
5 .7 .3 Replacing Crankcase Roller Bearings
To inspect the roller bearings, remove the flywheel,
flywheel hub, bearing carrier and crankshaft using the
following steps.
1. Remove the flywheel from the crankshaft by removing
the three bolts that holds the flywheel to the hub. After
removal, re-insert the bolts into the three THREADED
flywheel removal holes (see figure 3.2A for details).
Tighten the bolts EVENLY to remove the flywheel from
the flywheel hub.
Align slot with the pin located
inside the crankshaft.
Backside of
bearing carrier
Oil-passage hole
Make sure this hole is aligned
with the oil-passage hole
on the bearing carrier.
Bearing carrier
Bearing carrier
gasket
Bearing cup
Bearing cone
Flywheel key
Bearing cone
Bearing cup
Shim
Bearing cover
Oil seal
Crankcase
Drive pin
Spacer
Drive sprocket
Link pin
Crankshaft
Figure 5.7A
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