Disassembly and Assembly
DISASSEMBLY
NOTICE: When using a vise, do not overtighten it.
1. MEASURE PS VANE PUMP ROTATING TORQUE
a. Check that the vane pump rotates smoothly without abnormal noise.
b. Temporarily install the vane pump pulley set nut.
c. Using a torque wrench, check the vane pump rotating torque.
Rotating torque: 0.3 Nm (2.8 kgf-cm, 2.4 inch lbs.) or less
2. REMOVE SUCTION PORT UNION
a. Remove the bolt from the bracket of the suction port union.
b. Remove the 2 suction port union set bolts and suction port union.
c. Remove the O-ring from the suction port union.
3. REMOVE PRESSURE FEED NO. 2 TUBE
Remove the union bolt, 2 gaskets and pressure feed No. 2 tube.
4. REMOVE PRESSURE PORT UNION
a. Remove the pressure port union.
b. Remove the O-ring from the pressure port union.
5. REMOVE FLOW CONTROL VALVE AND SPRING
6. REMOVE REAR HOUSING, WAVE WASHER AND SIDE PLATE
a. Remove the 4 bolts and rear housing.
b. Remove the O-ring from the rear housing.
c. Remove the wave washer and side plate.
d. Remove the O-ring from the side plate.
7. REMOVE CAM RING, 10 VANE PLATES AND VANE PUMP ROTOR
NOTICE: Be careful not to drop the plate.
8. REMOVE GASKET
9. REMOVE 2 STRAIGHT PINS
Using pliers, remove the 2 straight pins from the front housing.
10. REMOVE VANE PUMP SHAFT WITH BEARING
a. Using snap ring pliers, remove the snap ring from the front housing.
b. Wind vinyl tape on the serrated part of the vane pump shaft.
c. Press out the vane pump shaft with the bearing.
NOTICE: Be careful not to damage the oil seal lip.
INSPECTION
NOTICE: When using a vise, do not overtighten it.
1. MEASURE OIL CLEARANCE BETWEEN VANE PUMP SHAFT AND BUSHING
Using a micrometer and caliper gauge, measure the oil clearance.
Standard clearance: 0.03 - 0.05 mm (0.0012 - 0.0020 inch)
Maximum clearance: 0.07 mm (0.0028 inch)
If it is more than the maximum, replace the front housing and vane pump shaft.
2. INSPECT VANE PUMP ROTOR AND VANE PLATES
a. Using a micrometer, measure the height, thickness and length of the 10 vane plates.
Minimum height: 8.6 mm (0.339 inch)
Minimum thickness: 1.397 mm (0.05500 inch)
Minimum length: 14.991 mm (0.59016 inch)
b. Using a feeler gauge, measure the clearance between the vane pump rotor groove and vane plate.
Maximum clearance: 0.03 mm (0.0012 inch)
If it is more than the maximum, replace the vane plate and/or vane pump rotor with the one having the same mark stamped on the cam ring.
Inscribed mark: 1, 2, 3, 4 or None
HINT: There are 5 vane plate lengths corresponding to the following vane pump rotor and cam ring marks:
3. INSPECT FLOW CONTROL VALVE
a. Coat the valve with power steering fluid and check that it falls smoothly into the valve hole by its own weight.
b. Check the flow control valve for leakage. Close one of the holes and apply compressed air of 392 - 490 kPa (4 - 5 kgf/cm2, 57 - 71 psi) into the opposite side hole, and confirm that air does not come out from the end hole.
If necessary, replace the flow control valve.
NOTICE: Install a new flow control valve with the same inscribed mark as the old one. Inscribed mark: A, B, C, D, E or F
4. INSPECT SPRING
Using vernier calipers, measure the free length of the spring.
Minimum free length: 33.2 mm (1.307 inch)
If it is not within the specification, replace the spring.
REPLACEMENT
NOTICE: When using a vise, do not overtighten it.
1. IF NECESSARY, REPLACE OIL SEAL
a. Using SST, tap out the oil seal from the front housing.
SST 09631-10030
NOTICE: Be careful not to damage the bushing of the front housing.
b. Coat a new oil seal lip with power steering fluid.
c. Using SST, press in the oil seal.
SST 09950-60010 (09951-00340), 09950-70010 (09951-07100)
NOTICE: Make sure to install the oil seal facing in the correct direction.
2. IF NECESSARY, REPLACE BEARING
a. Press out the bearing from the vane pump shaft.
b. Using snap ring expander, replace the snap ring with new one.
NOTICE: Be careful not to damage the vane pump shaft.
c. Coat a new bearing with power steering fluid.
d. Press in the bearing to the vane pump shaft.
REASSEMBLY
NOTICE: When using a vise, do not overtighten it.
1. COAT PARTS INDICATED BY ARROWS WITH POWER STEERING FLUID
2. INSTALL VANE PUMP SHAFT WITH BEARING
a. Wind vinyl tape on the serrated part of the vane pump shaft.
b. Using SST, press in the vane pump shaft with the bearing.
SST 09608-04031
NOTICE: Be careful not to damage the oil seal.
c. Using snap ring pliers, install a new snap ring to the front housing.
3. INSTALL 2 STRAIGHT PINS
Using a plastic hammer, tap in 2 new straight pins to the front housing.
NOTICE: Be careful not to damage the pins.
4. INSTALL CAM RING
Install the cam ring with the inscribed mark facing outward.
HINT: Align the holes of the cam ring with the 2 straight pins.
5. INSTALL VANE PUMP ROTOR
Install the vane pump rotor with the inscribed mark facing outward.
6. INSTALL 10 VANE PLATES AND GASKET
a. Install the 10 vane plates with the round end facing outward.
b. Install a new gasket on the front housing.
NOTICE: Be careful of the direction of the gasket.
7. INSTALL SIDE PLATE
a. Coat a new O-ring with power steering fluid and install it to the side plate.
b. Align the holes of the side plate and 2 straight pins, and install the side plate.
8. INSTALL WAVE WASHER
Install the wave washer so that its protrusions fit into the slots in the side plate.
9. INSTALL REAR HOUSING
a. Coat a new O-ring with power steering fluid and install it to the rear housing.
b. Install the rear housing with the 4 bolts.
Torque: 24 Nm (240 kgf-cm, 17 ft. lbs.)
10. INSTALL SPRING AND FLOW CONTROL VALVE
a. Install the spring.
b. Install the flow control valve facing in the correct direction
11. INSTALL PRESSURE PORT UNION
a. Coat a new O-ring with power steering fluid and install it to the pressure port union.
b. Install the pressure port union.
Torque: 83 Nm (850 kgf-cm, 61 ft. lbs.)
12. INSTALL PRESSURE FEED NO. 2 TUBE
Install new gasket on each side of the pressure feed No. 2 tube and install the pressure feed No. 2 tube with the union bolt.
Torque: 69 Nm (700 kgf-cm, 51 ft. lbs.)
13. INSTALL SUCTION PORT UNION
a. Coat a new O-ring with power steering fluid and install it to the suction port union.
b. Install the suction port union with the 2 union set bolts.
Torque: 13 Nm (130 kgf-cm, 10 ft. lbs.)
c. Install the bolt to the bracket of the suction port union.
Torque: 43 Nm (440 kgf-cm, 32 ft. lbs.)
14. MEASURE PS VANE PUMP ROTATING TORQUE