Fluid Pump: Service and Repair

NOTE: For removal and installation procedures refer to "Automatic Transmission/Transaxle, Service and Repair."




Component View

DISASSEMBLY

1. Use torque converter clutch as work stand.





Place the oil pump body on the torque converter clutch.





2. Remove oil seal rings remove the 2 oil seal rings.





3. Remove stator shaft.
a. Remove the 13 bolts, and then remove the stator shaft from the oil pump body.
b. Remove the oil pump body from the torque converter clutch.





4. Check body clearance of driven gear. Push the driven gear to one side of the body. Using a feeler gauge, measure the clearance.
- Standard body clearance: 0.07-0.15 mm (0.0028-0.0059 inch)
- Maximum body clearance: 0.30 mm (0.0118 inch)
If the body clearance is greater than the maximum, replace the drive gear, driven gear or pump body.





5. Check tip clearance of driven gear measure between the driven gear teeth and the crescent-shaped part of the pump body.
- Standard tip clearance: 0.11-0.14 mm (0.0043-0.0055 inch)
- Maximum tip clearance:0.30 mm (0.0118 inch)
If the tip clearance is greater than the maximum, replace the drive gear, driven gear or pump body.





6. Check side clearance of both gears. Using a steel straight edge and a feeler gauge, measure the side clearance of both gears.
- Standard side clearance: 0.02-0.05 mm (0.0008-0.0020 inch)
- Maximum side clearance: 0.1 mm (0.004 inch)
If the side clearance is greater than the maximum, replace the drive gear, driven gear or pump body.





7. Remove oil pump drive gear and driven gear.





8. Remove oil seal.
a. Pry off the oil seal with a screwdriver.





b. Using Special Service Tool (SST) 09350-30020 (09351-32140) or equivalent, install a new oil seal. The oil seal end should be flush with the outer edge of the pump body.
c. Coat the oil seal lip with MP grease.




OIL PUMP BUSHING CHECK

1. Check oil pump body bushing. Using a dial indicator, measure the inside diameter of the oil pump body bushing.
- Maximum Inside Diameter: 38.19 mm (1.5035 inch)
If the inside diameter is greater than the maximum, replace the oil pump body.





2. Check stator shaft bushing. Using a dial indicator, measure the inside diameter of the stator shaft bushing.
- Maximum inside diameter (front): 21.58 mm (0.8496 inch)
- Maximum inside diameter (rear): 27.08 mm (1.0661 inch)
If the inside diameter is greater than maximum, replace the stator shaft.

ASSEMBLY





1. Install driven gear and drive gear to oil pump body.
Place the oil pump body on the torque converter clutch. Coat the driven gear and drive gear with ATF. Install the driven gear and drive gear.





2. Install stator shaft to oil pump body.
a. Align the stator shaft with each bolt hole.
b. Tighten the 13 bolts.
Torque: 10 Nm (100 kgf/cm, 84 inch lbs.).





3. Install oil seal rings.
a. Coat the 2 oil seal rings with ATF.
b. Install the 2 oil seal rings to the stator shaft groove, then snug them down by squeezing their ends together.

NOTICE: Do not spread the ring ends too much.

HINT: After installing the oil seal rings, check that they rotate smoothly.





4. Check oil pump drive gear rotation. Make sure the drive gear rotates smoothly.