Kubota M105S, Workshop Manual

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1-S73
M105S, WSM ENGINE
(6) Oil Pump
Rotor Lobe Clearance
1. Measure the clearance between lobes of the inner rotor and the
outer rotor with a feeler gauge.
2. If the clearance exceeds the allowable limit, replace the oil pump
rotor assembly.
W1071602
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.
W1071741
Clearance between Rotor and Cover
1. Put a strip of plastigage (Code No. 07909-30241) onto the rotor
face with grease.
2. Install the cover and tighten the screws with the specified torque.
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 allowable limit, replace oil pump
rotor assembly and the cover.
W1071866
Clearance between
inner rotor and outer
rotor
Factory spec.
0.04 to 0.16 mm
0.0016 to 0.0063 in.
Allowable limit
0.3 mm
0.0118 in.
Clearance between
outer rotor and pump
body
Factory spec.
0.100 to 0.184 mm
0.0039 to 0.0072 in.
Allowable limit
0.3 mm
0.0118 in.
Clearance between rotor
and cover
Factory spec.
0.025 to 0.075 mm
0.0010 to 0.0030 in.
Allowable limit
0.225 mm
0.0089 in.
Tightening torque Oil pump cover screw
7.9 to 9.3 N·m
0.80 to 0.95 kgf·m
5.8 to 6.9 ft-lbs
KiSC issued 03, 2007 A