18. Oil Pump Overhaul
Removal Procedure1. Remove the oil pump seal from the oil pump body.
2. Remove the oil pump thrust washer and bearing from the rear of the oil pump cover.
3. Remove the oil pump seal rings (2).
4. Remove the 6 oil pump body bolts from the oil pump cover.
5. Remove the oil pump body.
6. Remove the input shaft oil seal from the oil pump body.
Cleaning and Inspection Procedure
^ Tools Required
- J 34673 Flat Gage Bar
1. Clean all oil pump components.
2. Allow the components to air dry.
3. Inspect the following oil pump components for excessive damage or wear. Replace as needed:
^ The drive gear
^ The driven gear (1)
^ The cover
4. Inspect the following oil pump components for distortion or warp. Replace as needed:
^ The body
^ The stator oil pump cover
5. Perform the following steps in order to measure the oil pump body-to-driven gear clearance:
5.1. Using a feeler gage, measure the clearance on one side.
^ Oil pump body-to-driven gear standard clearance: 0.07-0.15 mm (0.0028-0.0059 inch)
^ Oil pump body-to-driven gear maximum clearance: 0.30 mm (0.118 inch)
5.2. Push the oil pump driven gear to one side of the oil pump body while measuring the clearance on the opposite side.
5.3. Replace the oil pump if the clearance exceeds the maximum specified.
6. Perform the following steps in order to measure the oil pump drive gear tip clearance (1):
6.1. Using a feeler gage, measure the clearance between the oil pump drive gear teeth and crescent.
^ Oil pump drive gear tip standard clearance: 0.11-0.14 mm (0-0044-0.0055 inch)
^ Oil pump drive gear tip maximum clearance: 0.30 mm (0.118 inch)
6.2. Replace the oil pump if the clearance exceeds the maximum specified.
7. Measure the oil pump drive gear and driven gear side clearance using a J 34673 and a feeler gage:
7.1. Place the J 34673 across the oil pump body.
7.2. Measure the clearance between the drive gear and the driven gear and the oil pump body mating surface.
^ Oil pump drive gear and driven gear side standard clearance: 0.02-0.05 mm (0.0008-0.0019 inch)
^ Oil pump drive gear tip maximum clearance: 0.10 mm (0.0039 inch)
7.3. Replace the oil pump body if the clearance exceeds the maximum specified.
Installation Procedure
^ Tools Required
- J 9617 Pump Seal Installer
- J 36850 Transjel(TM) Transmission Assembly Lubricant
1. Install a new input shaft oil seal into the oil pump body (1) using the J 9617 and a hammer.
2. Apply J 36850 to the seal lip.
3. Install the oil pump cover (2) on the oil pump body.
Notice: Refer to Fastener Notice in Service Precautions.
4. Install the cover bolts.
^ Tighten the bolts to 9 Nm (80 inch lbs).
5. Apply J 36850 to the oil pump thrust washer and bearing.
6. Install the oil pump thrust washer and bearing onto the rear of the cover.
7. Install 2 new seal rings onto the cover.
8. Install a new oil pump seal onto the fluid pump body.
9. Inspect the drive gear as follows for smooth rotation:
9.1. Insert 2 small drift punches into the oil pump body (2) while turning the drive gear.
9.2. If the rotation is not smooth, disassemble the pump.
10. Install a hose clamp (1) in order to ensure correct alignment.