Power Steering Pump: Testing and Inspection

FLUID PRESSURE INSPECTION





1. Assemble the Special Service Tools (SSTs) as shown in the figure.
Tightening torque
40 - 49 Nm (4.0 - 5.0 kgf-m, 29 - 36 ft. lbs.)
2. Mark both hose connections to ensure that the hose is reinstalled in its original position.





3. Disconnect the pressure pipe from the oil pump, and connect the SSTs.
4. Bleed the air from the system.
5. Open the gauge valve fully. Start the engine and turn the steering wheel fully left and right to raise the fluid temperature to 50 - 60° C (122 - 140° F).

Caution If the valve is left closed for more than 5 seconds, the fluid temperature will rise excessively and adversely affect the oil pump.





6. Close the gauge valve completely. Increase the engine speed to 1,000 - 1,500 rpm and measure the fluid pressure generated by the oil pump.
^ If the pressure is not within specification, replace the oil pump component.
Oil pump fluid pressure
7846 - 8335 kPa (80 - 85 kgf/cm2, 1138 - 1208 psi)





7. Open the gauge valve fully and increase the engine speed to 1,000 - 1,500 rpm.

Caution If the steering wheel is kept in the fully turned position for more than 5 seconds, the fluid temperature will rise excessively and adversely affect the oil pump.

8. Turn the steering wheel fully to the left and right, then measure the fluid pressure generated at the gear housing.
^ If the pressure is not within specification, repair or replace the gear housing component.
Gear housing fluid pressure
7846 - 8335 kPa (80 - 85 kgf/cm2, 1138 - 1208 psi)
9. Remove the SSTs. Install and tighten the pressure pipe to the specified torque.
Tightening torque
32 - 47 Nm (3.2 - 4.8 kgf-m, 24 - 34 ft. lbs.)
10. Bleed the air from the system.