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CRANKCASE AND CRANKSHAFT
EC4N4101
Crankcase
EC4N4201
Crankshaft
4 - 81
1. Inspect:
Contacting surface a
Scratches → Replace.
Engine mounting boss b, crankcase
Cracks/damage → Replace.
2. Inspect:
Bearing
Rotate inner race with a finger.
Rough spot/seizure → Replace.
3. Inspect:
Oil seal
Wear/damage → Replace.
1. Measure:
Runout limit a
Small end free play limit b
Connecting rod big end side clearance
c
Crank width d
Out of specification → Replace.
Use the dial gauge and a thickness
gauge.
Dial gauge and stand:
YU-03097/90890-01252
Standard
0.03 mm
Runout
(0.0012 in)
limit:
Small end
0.4 ~ 1.0 mm
free play:
(0.016 ~ 0.039 in)
Side
0.15 ~ 0.45 mm
(0.0059 ~ 0.0177 in)
clearance:
Crack
61.95 ~ 62.00 mm
(2.439 ~ 2.441 in)
width:
ENG
<Limit>
0.05 mm
(0.002 in)
2.0 mm
(0.08 in)
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