Overhaul

DISASSEMBLY
1. Disassemble in the order shown in the illustration.
2. Inspect all parts and repair or replace as necessary.





INSPECTION
1. Use the Special Service Tool (SST) and a depth micrometer to measure the clearance between each gear and the pump body face.
2. The allowable clearance for each gear is 0.040 - 0.080 mm (0.0016 - 0.0031 inch). If the clearance exceeds the specification, replace the oil pump assembly.
3. Check for oil blockage.

ASSEMBLY
- Assemble in the reverse order of disassembly, referring to the following steps:





1. Install the driven gear in the oil pump body with the identification dot facing down.





2. Install the drive gear and insert in the oil pump body.

NOTE: Use the bolt hole next to Turbine Shaft Speed (TSS) sensor hole and the bolt hole opposite it for alignment pins.





3. Install the SST or equivalent in the oil pump body, with the alignment pins in the holes as shown.





4. Install the separator plate and new gasket on the oil pump body.





5. Install the pump support on the oil pump body.





6. Install and tighten the four pump support-to-oil pump body bolts to 13 Nm (10 ft. lbs.) and remove the SST (alignment pins). Install and tighten the two remaining mounting bolts to 13 Nm (10 ft. lbs.).





7. Install a new seal ring on the oil pump body. Ensure that the white stripe is visible all around the pump.





NOTE: Ensure that the scarf cut seals are overlapped correctly.





8. Install seven new seal rings on the pump support.





9. Install the oil pump drive shaft.
10. Use a torque wrench to rotate the oil pump. The maximum rotating torque is 0.3 Nm (2 inch lbs.).
11. Remove the torque wrench and oil pump drive shaft.
12. If the rotating torque exceeds the specification, disassemble and inspect the oil pump for contamination or improper end clearance.