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Crankshaft and Bearings Installation
Reference: "Crankshaft and Bearings Cleaning and
Inspection: ".
Crankshaft Bearing Installation Procedure
NOTE
If the crankshaft bearings have been used in
a running engine, you must replace them
with NEW crankshaft bearings for
reassembly.
1. Clean the crankcase crank bore with a lint-free cloth.
2. Clean all the oil from the backside of new bearing
halves.
3. Install the new upper crankshaft bearings into
position. The thrust bearing belongs in the number 3
journal. Ensure that the upper bearing insert
contains the oil transfer hole and groove. Roll the
bearing into position so that the lock tang engages
the crank slot. The bearing must fit flush with the
upper crankcase.
4. Install the new lower crankshaft bearings into
position in the main bearing caps. The lower
crankshaft bearings are identified by NO grooves or
holes. The bearings must fit flush with the crankshaft
bearing caps.
Crankshaft Installation Procedure
CAUTION
!
The crankshaft sprocket drive pin must be
set to the proper depth. Installing the
crankshaft sprocket drive pin too deep can
lead to damage to the crankshaft sprocket
and extensive engine damage.
1. If removed, install the crankshaft sprocket drive pin.
Lightly tap the pin in place with a small soft face,
bronze/plastic, hammer until it bottoms in the hole.
2. Gently lower the crankshaft into position in the
cylinder block.
Engine Mechanical:
1D-251
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