Power Steering Pump: Service and Repair
REMOVAL
1. Remove the engine under cover after removing the nine screws and four clips.
2. Remove the battery and do the following.
a. Disconnect the two terminals.
b. Remove the bolt, nut and battery clamp.
c. Remove the battery cover and battery.
3. Loosen the drive belt tension by turning the drive belt tensioner clockwise, and remove the belt.
4. Remove the return hose.
5. Using a spanner (24 mm) to hold the pressure port union, remove the union bolt and gasket, then remove the pressure feed tube
NOTE: Take care not to spill fluid on the A/C compressor rotor.
6. Remove the power steering vane pump assembly after remove the two bolts.
DISASSEMBLY
NOTE: When using a vise, do not overtighten it.
1. Measure the power steering vane pump rotating torque by using these steps.
a. Check that the pump rotates smoothly without abnormal noise.
b. Using a torque wrench, check the pump rotating torque. The rotating torque should be 0.2 Nm (2.2 inch lbs.).
2. Using the 09960-10010(09962-01000,09963-01000) SST to stop the pulley rotating, remove the pulley set nut, then the vane pump pulley.
3. Remove the oil reservoir after doing the following.
a. Remove the three bolts.
b. Remove the O-ring from the reservoir.
4. Remove the pressure port union, flow control valve and the spring, then remove the O-ring from the union.
5. Remove the rear housing after doing these steps.
a. Remove the two bolts.
b. Remove the two O-rings from the housing.
6. Remove the wave washer.
7. Remove the side plate.
8. Remove the cam ring, vane pump rotor and the 10 vane plates.
NOTE: Take care not to drop the plates.
9. Remove the two straight pins from the front housing.
10. Remove the gasket.
11. Remove the vane pump shaft with bearing and do the following.
a. Using snap ring pliers, remove the snap ring from the front housing.
b. Wind vinyl tape on the serrated part of the shaft.
c. Using a press, press out the shaft with the bearing.
INSPECTION AND REPLACEMENT
NOTE: When using a vise, do not overtighten it.
1. Using a micrometer and caliper gauge, measure the oil clearance between vane pump shaft and bushing. The standard clearance should be 0.03 - 0.05 mm (0.0012 - 0.0020 inch), the maximum clearance should be 0.07 mm (0.0028 inch). If it is more than maximum, replace the front housing and vane pump shaft.
2. Inspect the vane pump rotor and vane plates by doing the following.
a. Using a micrometer, measure the height, thickness and length of the ten plates. The minimum measurements are as follows.
Height: 8.6 mm (0.339 inch).
Thickness: 1.40 mm (0.0551 inch).
Length: 14.99 mm (0.5902 inch).
b. Using a feeler gauge, measure the clearance between the rotor groove and vane plate. The maximum clearance should be 0.03 mm (0.0012 inch). If it is more than the maximum, replace the vane plate and/or rotor with one having the same mark stamped on the cam ring.
NOTE:
^ The cam ring inscribed marks are 1,2,3,4 or None.
^ There are five vane plate lengths with the following rotor and cam ring marks.
c. The rotor and cam ring marks and lengths are listed below.
Mark: None
Part Number: 44345 - 26010
Plate Length: 14.999 - 15.001 mm (0.59051 - 0.59059 inch).
Mark: l
Part Number: 44345 - 26020
Plate Length: 14.997 - 14.999 mm (0.59043 - 0.59051 inch).
Mark: 2
Part Number: 44345 - 26030
Plate Length: 14.995 - 14.997 mm (0.59035 - 0.59043 inch).
Mark: 3
Part Number: 44345 - 26040
Plate Length: 14.993 - 14.995 mm (0.59027 - 0.59035 inch).
Mark: 4
Part Number: 44345 - 26050
Plate Length: 14.991 - 14.993 mm (0.59020 - 0.59027 inch).
3. Inspect the flow control valve by doing the following.
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 valve for leakage. Close one of the holes and apply 392 - 490 kPa (57 - 71 psi) of compressed air 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 mark on the front housing.
NOTE: The inscribed mark are A, B, C, D, E or F.
4. Using calipers, measure the free length of the spring. The minimum spring length is 33 mm (1.30 inch). If it is not within the specification, replace the spring.
5. If necessary, replace the oil seal by doing these procedures.
a. Using the 09631 - 10030 SST, tap out the oil seal.
NOTE: Be careful not to damage the bushing of the front housing.
b. Coat a new oil seal lip with power steering fluid.
c. Using a (24 mm) socket wrench , press in the oil seal.
NOTE: Make sure to install the oil seal facing the correct direction.
6. If necessary, replace the bearing by doing the following.
a. Using a press, press out the bearing.
b. Using a snap ring expander, remove the snap ring from the vane pump shaft.
NOTE: Be careful not to damage the shaft.
c. Using a snap ring expander, install a new snap ring
NOTE: Be careful not to damage the shaft.
d. Coat a new bearing with power steering fluid.
e. Using a press, press in the bearing.
ASSEMBLY
NOTE: When using a vise. do not overtighten it.
1. Coat the assembly with power steering fluid.
2. Install the vane pump shaft with the bearing and do the following.
a. Wind vinyl tape on the serrated part of the shaft.
b. Using the 09608 - 04031 SST, press in the shaft with the bearing to the front housing.
NOTE: Be careful not to damage the oil seal.
c. Using snap ring pliers, install a new snap ring to the front housing.
3. Install the pins by using a plastic hammer, drive in two new straight pins to the front housing.
NOTE: Be careful not to damage the pins.
4. Align the holes of the ring and straight pins, and install the cam ring with the inscribed mark facing outward.
5. Install the vane pump rotor with the inscribed mark facing outward.
6. Install the ten plates with the round end facing outward.
7. Install a new gasket.
8. Align the holes of the plate and straight pins, then install the side plate.
9. Install the wave washer so that its protrusions fit into the slots in the side plate.
10. Install the rear housing by following these steps.
a. Coat two new O-rings with power steering fluid and install them to the housing.
b. Tighten the two bolts to 17 Nm (12 ft. lbs.).
11. Install the spring, flow control valve and the pressure port union by following these procedures.
a. Coat a new O-ring with power steering fluid and install it to the union.
b. Install the valve facing the correct direction.
c. Tighten the union to 83 Nm (61 ft. lbs.)
12. Install the oil reservoir after doing the following.
a. Coat a new O-ring with power steering fluid and install it to the reservoir.
b. Tighten the three bolts as follows.
^ Front Side Bolt: 13 Nm (9 ft. lbs.)
^ Rear Side Bolts: 17 Nm (12 ft. lbs.).
13. Using the 09960 - 10010 (09962 - 01000, 09963 - 01000) SST to stop the pulley rotating, install vane pump pulley, then torque the pulley set nut to 43 Nm (32 ft. lbs.)
14. Measure the power steering vane pump rotating torque.
INSTALLATION
1. Install the power steering vane pump assembly, then tighten the two bolts to 58 Nm (43 ft. lbs.).
2. Connect the pressure feed tube by using a (24 mm) spanner to hold the pressure port union, torque the union bolt over a new gasket.
NOTE: Make sure that the stopper of the tube is touching the PS vane pump body, as shown, before tightening the bolt to 49 Nm (36 ft. lbs.).
3. Connect the return hose.
4. Loosen the drive belt tension by turning the drive belt tensioner clockwise, and install the belt.
5. Install the battery by doing the following.
a. Install the battery and battery cover.
b. Install the battery clamp with bolt and nut.
c. Connect the two terminals.
6. Install the engine under cover, then tighten the nine screws and install the four clips.
7. Bleed the power steering system.