Disassembly and Assembly
DISASSEMBLYNOTICE: 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. Using a torque wrench, check the pump rotating torque.
Rotating torque: 0.27 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 suction port 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 OIL PRESSURE SWITCH
NOTICE: Be careful not to drop the oil pressure switch.
If the oil pressure switch is dropped or strongly damaged, replace it with a new one.
5. REMOVE REAR HOUSING
a. Remove the bolt and rear bracket.
b. Remove the 4 bolts and rear housing.
c. Remove the O-ring from the rear housing.
6. REMOVE CAM RING, 10 VANE PLATES, VANE PUMP ROTOR AND SIDE PLATE
a. Remove the cam ring and 10 vane plates.
NOTICE: Take care not to drop the vane plate.
b. Using a screwdriver, remove the snap ring, vane pump rotor and side plate.
c. Remove the 2 O-rings from the side plate.
7. REMOVE VANE PUMP SHAFT WITH VANE PUMP PULLEY
INSPECTION
1. MEASURE OIL CLEARANCE BETWEEN VANE PUMP SHAFT AND BUSHING
Using a micrometer and a caliper gauge, measure the oil clearance.
Standard clearance: 0.021 - 0.043 mm (0.0008 - 0.0017 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: 7.6 mm (0.299 inch)
Minimum thickness: 1.405 mm (0.0553 inch)
Minimum length: 11.993 mm (0.4722 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: 0, 1, 2, 3, or 4
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 flow control valve with power steering fluid and check that it falls smoothly into the valve hole of the front housing 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 with the 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: 35.8 mm (1.409 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 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 (09951-00280), 09950-70010 (09951-07100)
NOTICE: Make sure that the oil seal is installed facing in the correct direction.
REASSEMBLY
NOTICE: When using a vise, do not overtighten it.
Part 1 Of 2:
Part 2 Of 2:
1. COAT PARTS INDICATED BY ARROWS WITH POWER STEERING FLUID
2. INSTALL VANE PUMP SHAFT WITH VANE PUMP PULLEY
3. INSTALL SIDE PLATE
a. Coat 2 new O-rings with power steering fluid, and install them to the side plate.
b. Align the dent of the side plate with the dent of the front housing, and install the side plate.
NOTICE: Make sure that the side plate is installed facing in the correct direction.
4. INSTALL CAM RING
Align the dent of the cam ring with the dent of the side plate, and install the cam ring with the inscribed mark facing outward.
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 10 VANE PLATES
Install the 10 vane plates with the round end facing outward.
7. INSTALL REAR HOUSING
a. Coat a new O-ring with power steering fluid, and install it to the rear housing.
b. Align the straight pin of the rear housing with the dents of the cam ring, side plate and front housing, and install the rear housing with the 4 bolts.
Torque: 22 Nm (220 kgf-cm, 16 ft. lbs.)
c. Install the rear bracket with the bolt.
Torque: 44 Nm (440 kgf-cm, 32 ft lbs.)
8. INSTALL OIL PRESSURE SWITCH
Torque: 21 Nm (210 kgf-cm, 15 ft. lbs.)
9. INSTALL SPRING, FLOW CONTROL VALVE AND PRESSURE PORT UNION
a. Install the spring.
b. Install the flow control valve facing in 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: 69 Nm (700 kgf-cm, 51 ft. lbs.)
10. 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: 12 Nm (120 kgf-cm, 9 ft. lbs.)
11. MEASURE PS VANE PUMP ROTATING TORQUE