Oil Pump (A/T)

OIL PUMP (A/T)





COMPONENT

DISASSEMBLY
1. Remove bearing race.
2. Remove four seal rings.





3. Loosen six mounting bolts evenly in pattern shown and remove oil pump cover from oil pump housing.

CAUTION: Do not use a punch to mark outer and inner rotors.





4. Mark outer and inner rotors as shown, and separate them from oil pump housing.
5. Remove plug then remove washer, spring and fluid pressure bypass valve.

INSPECTION
Oil pump housing, outer rotor, inner rotor
1. Install outer rotor and inner rotor.





2. Measure clearance between end of oil pump housing and outer rotor and inner rotor at no less than four places along their circumferences.
Clearance
Standard: 0.00079 - 0.0157 inch (0.02 - 0.04 mm)
Maximum: 0.0020 inch (0.05 mm)
3. If not as specified, replace oil pump assembly.
4. Measure clearance between oil pump boss and inner rotor in at least four places and calculate average value.
Inner diameter
Standard: 0.00157 - 0.00453 inch (0.04 - 0.115 mm)
Maximum: 0.0049 inch (0.125 mm)
5. If not within specification, replace oil pump as an assembly.

INSPECTION (SPRING)








1. Measure spring free length.
2. If not as specified, replace oil pump as an assembly.

FLUID PRESSURE BY PASS VALVE





1. Measure fluid pressure by pass valve and check for wear.
Outer diameter
Standard: 0.551 inch (14.00 mm)
Minimum: 0.550 inch (13.98 mm)
2. If not as specified, replace oil pump as an assembly.

RE-ASSEMBLY
1. Install fluid pressure by pass valve spring into oil pump housing, and verify that fluid pressure by pass valve moves smoothly.





2. Install a new washer and plug.
Tightening torque: 24 - 33.6 inch lbs. (32 - 47 Nm, 3.2 - 4.8 kg-m)





3. Align marks and install outer and inner rotors.
4. Install oil pump flange.
5. Mount oil pump cover onto oil pump housing.





6. Tighten six bolts evenly and gradually in order shown.
Tightening torque: 72 - 97.2 inch lbs. (8.1 - 10.9 Nm, 82 - 112 kg-cm)
7. Install oil pump shaft and rotate pump rotors to verify smooth oil pump operation.





8. Install four seal rings.





9. Apply petroleum jelly to bearing race and secure it on oil pump cover.
Bearing race outer diameter: 3.46 inch (88.0 mm)