Oil Pump Housing
Oil Pump HousingREMOVAL
1. Remove the transmission assembly from vehicle.
2. Pull out the torque converter assembly.
3. Remove the input shaft.
4. Lift-up the lever on the rear side of transmission harness connector, and then remove it from stay.
5. Remove the inhibitor switch connector from stay.
6. Remove the oil charge pipe.
7. Remove the oil cooler inlet and outlet pipes.
8. Separate the converter case and transmission case part.
9. Separate the transmission case and extension case part.
10. Remove the reduction drive gear.
11. Remove the reduction driven gear.
12. Loosen the oil pump housing mounting bolts.
13. Place two wooden blocks on the workbench, and stand the transmission case with its rear end facing down.
NOTE:
^ Be careful not to scratch the rear mating surface of transmission case.
^ Note that the parking rod and drive pinion protrudes from mating surface.
14. Remove the oil pump housing and adjusting thrust washer.
INSTALLATION
1. Secure the oil pump housing with two nuts and a bolt.
Tightening torque: 42 Nm (4.3 kgf-cm, 31 ft. lbs.)
2. Install the converter case into transmission case assembly.
3. Install the reduction driven gear.
4. Install the reduction drive gear.
5. Combine the transmission case with extension case, and then install the rear vehicle speed sensor.
6. Insert the inhibitor switch and transmission connector to the stay.
7. Install the oil cooler pipe.
8. Install the oil charge pipe with a O-ring.
9. Insert the input shaft with rotating it by hand lightly, and then check the protrusion amount.
Normal protrusion A: 50 - 55 mm (1.97 - 2.17 inch)
10. Install the torque converter assembly.
11. Install the transmission assembly into vehicle.
DISASSEMBLY
OIL PUMP COVER
1. Remove four seal rings.
2. Remove the cover by lightly tapping the end of stator shaft.
3. Remove the inner and outer rotor.
OIL SEAL RETAINER
1. Remove the oil seal retainer.
2. Remove the O-ring.
3. Remove the oil seal from oil seal retainer.
ASSEMBLY
OIL PUMP COVER
1. Install the oil pump rotor assembly to oil pump housing.
2. Align both pivots with the pivot holes of cover, and then install the oil pump cover being careful not to apply excessive force to the pivots.
Tightening torque: 25 Nm (2.5 kgf-cm, 18 ft. lbs.)
3. After assembling, turn the oil pump shaft to check the smooth rotation of rotor.
4. Apply Vaseline to the oil seal retainer and new seal rings, and install them. After installing, adjust the tooth contact and backlash of drive pinion.
2. OIL SEAL RETAINER
1. Apply ATF, to new oil seals (two), and install them to the oil seal retainer in proper direction using ST.
ST 499247300 INSTALLER
2. Apply ATF, to a new O-ring and install it to the oil seal retainer. Install the seal to oil pump housing bore.
3. Install the oil seal and secure it using three bolts being careful not to damage oil seal lip.
Tightening torque: 7 Nm (0.7 kgf-cm, 5.1 ft. lbs.)
INSPECTION
1. Check the seal ring and oil seal for breaks and damages.
2. Check other parts for dents or abnormalities.
3. Selection of oil pump rotor assembly
1. Tip clearance
Install the inner rotor and outer rotor to oil pump.
With rotor gears facing each other, measure the crest-to-crest clearance.
Tip clearance: 0.02 - 0.15 mm (0.0008 - 0.0059 inch)
2. Side clearance Set a depth gauge to oil pump housing, then measure the oil pump housing-to-rotor clearance.
Side clearance: 0.02 - 0.04 mm (0.0008 - 0.0016 inch)
3. If the depth and/or side clearance are not within the specifications, replace the rotor assembly.
Measure the total end play and adjust it within specifications.
ADJUSTMENT
1. Using the ST, measure the length L, which is from the mating surface of transmission to the recessed portion of high clutch drum.
ST 398643600 GAUGE
2. Using the ST, measure the length from oil pump housing mating surface to the top surface of oil pump cover with thrust needle bearing.
ST 398643600 GAUGE
3. Calculation of total end play
Select the suitable bearing race from among those listed in this table so that clearance C to be within 0.25 to 0.55 mm (0.0098 to 0.0217 inch).
C = (L + G) - l
4. After completing the end play adjustment, insert the bearing race in recess of the high clutch. Install the thrust needle bearing to oil pump cover using Vaseline.
5. After correctly install the new gasket to the case mating surface, carefully install the oil pump housing assembly. Be careful to avoid hitting the drive pinion against the inside of case.
6. Install both parts with dowel pins aligned. Make sure no clearance at mating surface.