Oil Pump - wsm L3301 Workshop Manual

L3301, L3901, L4701, WSM

[6] OIL PUMP

Rotor Lobe Clearance
1. Measure the clearance between the lobes of the inner rotor and
the outer rotor with a feeler gauge.
2. Measure the clearance between the outer rotor and the pump
body with a feeler gauge.
3. If the clearance is more than the allowable limit, replace the
rotor assembly of the oil pump.
Factory specification
Clearance between inner
rotor and outer rotor
Allowable limit
Factory specification
Clearance between outer
rotor and pump body
Allowable limit
Clearance between Rotor and Cover
1. Put a strip of plastigauge on the rotor face with grease.
2. Install the cover and tighten the screws.
3. Remove the cover carefully.
4. Measure the width that plastigauge becomes flat with the scale
to get the oil clearance.
5. If the clearance is more than the allowable limit, replace the
rotor assembly of the oil pump.
Factory specification
Clearance between inner
rotor and cover
Allowable limit
1-S79
ENGINE
0.030 to 0.14 mm
0.0012 to 0.0055 in.
0.2 mm
0.008 in.
0.11 to 0.19 mm
0.0044 to 0.0074 in.
0.25 mm
0.0098 in.
9Y1211012ENS0109US0
0.105 to 0.150 mm
0.00414 to 0.00590 in.
0.20 mm
0.008 in.
9Y1211012ENS0110US0
KiSC issued 09, 2016 A