Servicing - Kubota Z400-B Handbuch

SERVICING
Pump Rotor and Lobe Clearance
1. Remove the oil pump from the crankcase.
2. Remove the screw and the port plate.
3. Measure the clearances between the outer rotor and the
housing, and between the outer and inner rotor with a
feeler gauge.
If the clearance exceeds the allowable limit. replace the
pump.
Factory
0.07 toO.15 mm
Clearance between outer
specif ication
0.0028 to 0.0059 in.
rotor and housi ng
Allowable
0.30 mm
timit 0.0118 in.
Clearance between outer Allowable 0.25mm
and inner rotor limit 0.0098 in.
Rotor End Clearance
1. Put a strip of Plastigage on the rotor and install the pump
to the crankcase with the port plate.
2. Remove the pump and the port plate.
3. Measure the amount of the flattening with the scale, and
get the clearance.
4. If the clearance is not within the reference values, replace
the pump.
0.075 to 0.135 mm
0.0030 to 0.0053 in.
End clearance
Factory specification
0.20 mm
Allowable limit
0.0079 in.
CUl9F05U
S·113
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