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Crankshaft Run-Out
1) Mount the crankshaft on a set of V-blocks.
2) Set up the dial indicator to the center of crankshaft
journal.
3) Slowly rotate the crank shaft.
Read the dial indicator (TIR) as you turn the
crankshaft.
Replace the crank shaft if the crank shaft
measured value is out of the specified limit.
Check the repaired crank shaft after repaired, and
replace it if any damaged or cracked part is found.
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Main Bearing and Connecting Rod Bearing
Tension
Check main bearing to be maintained tension enough,
and set up its regular position with the finger
pressure.
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Crankshaft Grinding
Pay attention the below described in order to reuse
the regrinded crank shaft.
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Procedure of Crankshaft grinding
1) Grind the crank shaft journal part and pin part.
2) Grind "R" part of journl and pin to meet min R3.5 ±
0.2.
3) Make journal, pin and oil hole with R1, and finish it
with soft cotton.
4) Measure the size of jounal, pin, main bearing, con-
rod bearing.
5) Measure the crank shaft run-out.
EJM2095S
EJM2091S
EJM2096S
Standard Limit
Crankshaft Run-Out 0.05 mm 0.40 mm
Undersize Bearing 0.25 mm 0.50 mm
Journal and Pin Roughness 0.4 or less
R Part
less then 3.8
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