Power Steering Pump: Service and Repair

POWER STEERING OIL PUMP





COMPONENTS

REMOVAL





1. Remove the pressure hose from the oil pump.

NOTE: When assembling, use a new O-ring.

2. Disconnect the suction hose from the suction connector and drain the fluid into a container.

CAUTION: When removing the suction hose, cover the generator with vinyl not to be damaged by the oil inflowing.





3. Remove the drive belt.
4. Loosen the tensioner adjusting bolt to remove the drive belt.





5. Remove the oil pump mounting bolts and disconnect the pressure switch connector.

DISASSEMBLY





1. Remove the suction pipe and the O-ring from the oil pump.
2. Remove the rear cover with the gasket.
3. Remove the cam ring.
4. Remove the rotor and vanes.





5. Remove the front side plate.
6. Remove the inner and outer O-ring.





7. Remove the spring.

NOTE: When assembling, use a new gasket and O-ring.

8. Remove the oil seal.





9. Pull off the pulley shaft and bearing by using a plastic hammer.





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

NOTE: When assembling, use a new oil seal.

11. Remove the guide bracket and nut.
12. Remove the connector from the oil pump body, and then remove the flow control valve and flow control spring.





13. Remove the O-ring from the connector.

CAUTION: Do not disassemble the flow control valve.

14. Remove the oil pump switch.
15. Take out the spring and the spool.





16. Remove the O-ring from the oil pump switch.

INSPECTION
1. Clean all disassembled parts with a suitable cleaning solvent.
2. If any inside parts of the oil pump have been damaged, replace the pump as an assembly.
3. If the pulley is cracked or deformed, replace it.
4. If oil leaks around the pulley shaft oil seal, replace the oil seal.
5. If the serrations of the pulley or pulley shaft are deformed or worn out, replace them.

REASSEMBLY
1. Install the oil pump switch.
2. Install the flow control valve spring, valve and connector in the pump body.

NOTE: Apply a thin coat of power steering fluid to all parts including the oil seal and O-ring.

3. Install the guide bracket and nut.





4. Using special tool (09222-32100), install the oil seal into the pump body.
5. Gently insert the shaft assembly and install the snap ring.





6. Install the pump pulley and woodruff key in place.
7. Install the spring and the inner and outer O-rings.





8. Install the front side plate.





9. Insert the pins into the pin grooves of the front housing, and then install the cam ring, paying attention to its direction.
10. Install the rotor with its punch marked side facing to-wards the front side plate.





11. Install the vane plates with the round end facing outward.
12. Install the gasket and rear cover.
13. Tighten the suction connector.

INSTALLATION
1. Install the oil pump to the oil pump bracket.
2. Install the suction hose.
3. Install the ribbed V-belt and adjust its tension.
4. Connect the pressure hose to the oil pump, and the suction hose to the oil reservoir.

NOTE: Install the hoses so that they are not twisted and they do not come in contact with any other parts.

5. Replenish the reservoir.
Recommended fluid: Power steering fluid (PSF-III)
6. Bleed the system.
7. Check the oil pump pressure.
8. Install parts by referring to the torque specification.