Kubota EA330-E4 Series - Oil Pump

ENGINE
EA330-E4, WSM
1-S60
(6) Oil Pump
Clearance between Inner Rotor and Outer Rotor
1. Measure the clearance between a high point on the inner rotor
and high point on the outer rotor with a feeler gauge.
2. If the clearance exceeds the allowable limit, replace the oil
pump rotor assembly.
9Y1211018ENS0107US0
Clearance between Outer Rotor and Pump Body
1. Measure the clearance between the outer rotor and the pump
body with a feeler gauge.
2. If the clearance exceeds the allowable limit, replace the oil
pump rotor assembly.
9Y1211018ENS0108US0
Clearance between Rotor and Cover
1. Put a strip of press gauge onto the rotor face with grease.
2. Install the cover and tighten the screws.
3. Remove the cover carefully, and measure the depression of
press gauge with a sheet of gauge.
4. If the clearance exceeds the allowable limit, replace the oil
pump rotor assembly.
9Y1211018ENS0109US0
Clearance between inner
rotor and outer rotor
Factory specification
0.15 mm or less
0.0059 in. or less
Allowable limit
0.20 mm
0.0079 in.
Clearance between outer
rotor and pump body
Factory specification
0.0900 to 0.171 mm
0.00355 to 0.00673 in.
Allowable limit
0.24 mm
0.0094 in.
Clearance between rotor
and cover
Factory specification
0.02 to 0.06 mm
0.0008 to 0.002 in.
Allowable limit
0.25 mm
0.0098 in.
KiSC issued 05, 2015 A