Section 01 ENGINES (1503 4-TEC)
Subsection 04 (LUBRICATION SYSTEM)
1
R1503motr136A
2
TYPICAL
1. Oil pump shaft ass'y
2. Outer rotor
Inspection
Inspect oil pump shaft assembly, housing and cov-
er for marks or other damages.
Check inner rotor for corrosion, pin-holes or other
damages. If so, replace oil pump shaft assembly.
Ensure to also check oil pump housing and cover
and replace if damaged.
1
R1503motr137A
1. Pittings on the teeth
Using a feeler gauge, measure the clearance be-
tween inner and outer rotors.
R1503motr138A
2
1
C
B
A
1. Outer rotor
2. Inner rotor
OUTER AND INNER ROTOR CLEARANCE
SERVICE LIMIT
A
B
C
0.25 mm (.009 in)
If clearance between inner and outer rotors ex-
ceeds the tolerance, replace oil pump shaft as-
sembly. Ensure to also check oil pump housing
and cover and replace if damaged.
If clearance between outer rotor and its bore in
oil pump exceeds the tolerance, replace the com-
plete oil pump and the PTO housing.
Using a vernier depth gage, measure side wear as
shown.
2
R1503motr139A
1
1. Oil pump housing surface
2. Vernier depth gage
56 SMR2005-035
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