Kubota EA330-E4 Series - Page 119

ENGINE
EA330-E4, WSM
1-S54
Crankshaft Side Clearance
1. Move the crankshaft to the flywheel side.
2. Attach a dial gauge to the crankshaft (3).
3. Measure the end play by pushing the crankshaft toward the
crank gear (5).
4. If the measurement exceeds the allowable limit, replace the
main bearing retainer (1).
5. If the new end play still exceeds the allowable limit, check main
bearings 2 (2) and 1 (4). If worn abnormally, replace main
bearings.
NOTE
• When the end play is below the factory specifications, it
may be heavy turning or difficult starting, and when it is
over, it may be vibration of the flywheel or knocking.
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Oil Clearance between Crankshaft and Oil Filler Ring
1. Measure the crankshaft O.D. with an outside micrometer.
2. Measure the oil filler ring I.D. with an inside micrometer, and
calculate the oil clearance.
3. If the clearance exceeds the allowable limit, replace the oil filler
ring.
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Crankshaft Alignment
1. Support the crankshaft with V block on the surface plate and set
a dial indicator with its tip on the intermediate journal at right
angle.
2. Rotate the crankshaft on the V block and get the misalignment
(half of the measurement).
3. If the misalignment exceeds the allowable limit, replace the
crankshaft.
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Crankshaft side
clearance
Factory specification
0.050 to 0.46 mm
0.0020 to 0.018 in.
Allowable limit
0.56 mm
0.022 in.
Thickness of main
bearing retainer
Factory specification
1.9 to 2.0 mm
0.075 to 0.078 in.
(1) Main Bearing Retainer
(2) Main Bearing 2
(3) Crankshaft
(4) Main Bearing 1
(5) Crank Gear
Oil clearance between
crankshaft and oil filler
ring
Factory specification
0.025 to 0.066 mm
0.00099 to 0.0025 in.
Allowable limit
0.2 mm
0.008 in.
Crankshaft O.D.
Factory specification
34.959 to 34.975 mm
1.3764 to 1.3769 in.
Oil filler ring I.D.
35.000 to 35.025 mm
1.3780 to 1.3789 in.
Crankshaft alignment Allowable limit
0.04 mm
0.002 in.
KiSC issued 05, 2015 A