Disassembly and Assembly
Part 1 Of 2:
Part 2 Of 2:
DISASSEMBLY
NOTICE: When using a vise, do not overtighten it.
1. MEASURE PS VANE PUMP ROTATING TORQUE
a. Check that the pump rotates smoothly without abnormal noise.
b. Temporarily install the bolt.
c. Using a torque wrench, check the pump rotating torque.
Rotating torque: 0.28 Nm (2.8 kgf-cm, 2.4 inch lbs.) or less
2. REMOVE SUCTION PORT UNION
a. Remove the bolt and suction port union.
b. Remove the O-ring from the union.
3. REMOVE PRESSURE PORT UNION, FLOW CONTROL VALVE AND SPRING
a. Remove the pressure port union, flow control valve and spring.
b. Remove the O-ring from the pressure port union.
4. REMOVE REAR HOUSING
a. Remove the 4 bolts and rear housing.
HINT: If the wave washer and side plate are stuck to the rear housing, lightly tap the rear housing with a plastic hammer, and remove the wave washer and side plate.
b. Remove the 2 O-rings from the rear housing.
5. REMOVE WAVE WASHER
6. REMOVE SIDE PLATE
7. REMOVE GASKET
8. REMOVE CAM RING, 10 VANE PLATES AND VANE PUMP ROTOR
a. Using a screwdriver, remove the snap ring from the vane pump shaft.
b. Remove the cam ring, 10 vane plates and vane pump rotor.
NOTICE: Be careful not to drop the plate.
9. REMOVE VANE PUMP SHAFT WITH VANE PUMP PULLEY
10. REMOVE STRAIGHT PINS
Remove the 2 pins from the front housing.
INSPECTION
1. CHECK 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 shaft and front housing.
2. INSPECT VANE PUMP ROTOR AND VANE PLATES
a. Using a micrometer, measure the height, thickness and length of the 10 plates.
Minimum height: 8.6 mm (0.339 inch)
Minimum thickness: 1.397 mm (0.0550 inch)
Minimum length: 14.991 mm (0.5902 inch)
b. Using a feeler gauge, measure the clearance between the rotor groove and plate.
Maximum clearance: 0.033 mm (0.0013 inch)
If it is more than the maximum, replace the plate and/or rotor with 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 with the following 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 392 - 490 kPa (4 - 5 kgf/cm2, 57 - 71 psi) into the opposite side, and confirm that air does not come out from the end holes.
If necessary, replace the valve with one having the same letter as inscribed on the front housing.
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.
IF NECESSARY, REPLACE OIL SEAL
a. Using a screwdriver with vinyl tape wound around its tip, remove the oil seal.
NOTICE: Be careful not to damage 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 (09951-00330), 09950-70010 (09951-07100)
NOTICE: Make sure to install the oil seal facing in the correct direction.
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 VANE PUMP PULLEY
3. INSTALL STRAIGHT PINS
Using a plastic hammer, tap in 2 new 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 straight pins.
5. INSTALL VANE PUMP ROTOR
a. Install the vane pump rotor with the inscribed mark facing outward.
b. Install a new snap ring to the vane pump shaft.
6. INSTALL VANE PLATES AND GASKET
a. Install the 10 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
Align the holes of the plate and 2 straight pins.
8. INSTALL WAVE WASHER
Install the washer so that its protrusions fit into the slots in the side plate.
9. INSTALL REAR HOUSING
a. Coat 2 new O-rings with power steering fluid and install them 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, FLOW CONTROL VALVE AND PRESSURE PORT UNION
a. Install the spring to the front housing.
b. Install the flow control valve facing the correct direction.
c. Coat a new O-ring with power steering fluid and install it to the pressure port union.
d. Install the pressure port union.
Torque: 83 Nm (850 kgf-cm, 61 ft. lbs.)
11. 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 bolt.
Torque: 13 Nm (130 kgf-cm, 9 ft. lbs.)
12. MEASURE PS VANE PUMP ROTATING TORQUE