Kubota EA330-E4 Series Workshop Manual page 119

EA330-E4, WSM
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.
Factory specification
Crankshaft side
clearance
Allowable limit
Thickness of main
Factory specification
bearing retainer
(1) Main Bearing Retainer
(2) Main Bearing 2
(3) Crankshaft
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.
Factory specification
Oil clearance between
crankshaft and oil filler
ring
Allowable limit
Crankshaft O.D.
Factory specification
Oil filler ring I.D.
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.
Crankshaft alignment Allowable limit
1-S54
ENGINE
0.050 to 0.46 mm
0.0020 to 0.018 in.
0.56 mm
0.022 in.
1.9 to 2.0 mm
0.075 to 0.078 in.
(4) Main Bearing 1
(5) Crank Gear
9Y1211018ENS0093US0
0.025 to 0.066 mm
0.00099 to 0.0025 in.
0.2 mm
0.008 in.
34.959 to 34.975 mm
1.3764 to 1.3769 in.
35.000 to 35.025 mm
1.3780 to 1.3789 in.
9Y1211018ENS0094US0
0.04 mm
0.002 in.
9Y1211018ENS0095US0
KiSC issued 05, 2015 A