Oil Pump - Kubota B1220 Workshop Manual

B1220, B1620, B1820, WSM

(6) Oil Pump

Rotor Lobe Clearance
1. Measure the clearance between lobes of the inner rotor and the
outer rotor with a thickness gauge.
2. If the clearance exceeds the factory specifications, replace the
oil pump rotor assembly.
Rotor lobe clearance Factory specification
Clearance between Outer Rotor and Pump Body
1. Measure the clearance between the outer rotor and the pump
body with a thickness gauge.
2. If the clearance exceeds the factory specifications, replace the
oil pump rotor assembly.
Clearance between outer
Factory specification
rotor and pump body
Clearance between Rotor and Cover
1. Put a strip of plastigage onto the rotor face with grease.
2. Install the cover and tighten the screws.
3. Remove the cover carefully, and measure the amount of the
flattening with the scale and get the clearance.
4. If the clearance exceeds the factory specifications, replace oil
pump rotor assembly.
Clearance between rotor
Factory specification
and cover
1-S56
ENGINE
0.030 to 0.14 mm
0.0012 to 0.0055 in.
9Y1210272ENS0094US0
0.070 to 0.15 mm
0.0028 to 0.0059 in.
9Y1210272ENS0096US0
0.0750 to 0.135 mm
0.00296 to 0.00531 in.
9Y1210272ENS0095US0
(EU)
KiSC issued 07, 2011 A