Power Steering Pump: Service and Repair

POWER STEERING OIL PUMP

COMPONENTS:

REMOVAL
1. Remove the pressure hose from the oil pump and the suction hose from the suction pipe, then drain the power steering oil.





2. Release the tension of the power steering V-type belt by lifting the auto-tensioner pulley.





3. Remove the V-type belt from the pulley of the power steering oil pump.





4. Remove the power steering oil pump assembly by re moving the three bolts as shown.





DISASSEMBLY
1. Remove the bolts from the oil pump body, and then remove the suction pipe and O-ring.





2. Loosen the four bolts and remove the oil pump cover assembly.
3. Remove the cam ring.
4. Remove the rotor and vanes.
5. Remove the oil pump side plate.





6. Remove the inner and outer O-ring.
7. Remove the inner O-ring and outer O-ring.





8. Remove the snap ring and take out the pulley and the drive shaft assembly





9. Remove the oil seal from the oil pump body.





10. Remove the connector from the oil pump body, and take out the flow control valve and the flow control spring.





INSPECTION
1. Check the free length of the flow control spring.
Free length of the flow control spring: 36.5 mm





2. Check that the flow control valve is not bent.
3. Check the shaft for wear and damage.
4. Check the V-belt for wear and deterioration.
5. Check the grooves of the rotor and vanes for stratified abrasion.
6. Check the contact surface of the cam ring and vanes for stratified abrasion.
7. Check vanes for damage.
8. Check that there is no striped wear in the side plate or contacting part between the shaft and the pump cover surface.

REASSEMBLY
1. Install the flow control spring, the flow control valve and the connector in to the pump body.





2. Install the oil sea[ in the pump body by using the special tool (09222-32100).





3. Install the pump pulley.





4. Assemble the inner O-ring and the outer O-ring and install the site plate.





5. After inserting the lock pin into the groove of the front housing, install the cam ring attending to the direction.





6. Install the rotor.
7. Install the vanes.





8. Install the gasket and oil pump cover assembly.
9. Install the suction pipe and O-ring.





INSTALLATION
1. Install the oil pump to the oil pump bracket.





2. Install the V-type belt by pulling the auto-tensioner.
3. Install the suction hose.

CAUTION: Install the pressure hose to the oil pump.

4. Install the pressure hose to the oil pump.

NOTE: Install the pressure hose being careful so that it does not twist and come in contact with other components.





5. Add power steering fluid (PSF-3).
6. Air bleed the system.
7. Check the oil pump pressure.