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ENG
CRANKSHAFT
EAS00395
CHECKING THE CRANKSHAFT
1. Measure:
• crankshaft runout
Out of specification
→
Replace the crank-
shaft.
2. Check:
• crankshaft journal surfaces
• crankshaft pin surfaces
• bearing surfaces
Scratches/wear
→
Replace the crankshaft.
Crankshaft runout
Less than 0.03 mm (0.0012 in)
CHECKING THE CRANKSHAFT JOURNAL
BEARINGS
1. Measure:
• crankshaft-journal-to-crankshaft-journal-
bearing clearance
Out of specification
→
Replace the crank-
shaft journal bearings.
CAUTION:
_
Do not interchange the crankshaft journal
bearings. To obtain the correct crankshaft-
journal-to-crankshaft-journal-bearing clear-
ance and prevent engine damage, the
crankshaft journal bearings must be
installed in their original positions.
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a. Clean the crankshaft journal bearings,
crankshaft journals, and bearing portions of
the crankcase.
b. Place the upper crankcase upside down on
a bench.
Crankshaft-journal-to-crankshaft-
journal-bearing clearance
0.029 ~ 0.053 mm
(0.0011 ~ 0.0021 in)