Oil Pump Pressure Test

1. Disconnect the pressure hose from the oil pump, and then connect the special tools.
2. Bleed the air, and then turn the steering wheel several times while the vehicle is not moving so that the temperature of the fluid rises to approximately 50 - 60°C (122 - 140°F).
3. Start the engine and idle it at 1,000 ± 100 r/min.
4. Fully close the shut-off valve of the pressure gauge and measure the oil pump relief pressure to confirm that it is within the standard value range.

Standard value: 8.3 - 9.0 MPa (1,209 - 1,309 psi)

CAUTION: Pressure gauge shut off valve must not remain closed for more than 10 seconds.

5. If it is not within the standard value, overhaul the oil pump.
6. Remove the special tools, and the tighten the pressure hose to the specified torque.
7. Bleed the system.

Checking Pressure Under No-Load Conditions





1. Disconnect the pressure hose from the oil pump, and then connect the special tools.
2. Bleed the air, and then turn the steering wheel several times while the vehicle is not moving so that the temperature of the fluid rises to approximately 50 - 60°C (122 - 140°F).
3. Start the engine and idle it at 1,000 ± 100 r/min.
4. Check whether or not the hydraulic pressure is the standard value when no-load conditions are created by fully opening the shut-off valve of the pressure gauge.

Standard value: 0.8 - 1.0 MPa (114 - 142 psi)

5. If it is not within the standard value, the probable cause is a malfunction of the oil line or steering gear box, so check these parts and repair as necessary.
6. Remove the special tools, and then tighten the pressure hose to the specified torque.
7. Bleed the system.

Steering Gear Retention Hydraulic Pressure Check





1. Disconnect the pressure hose from the oil pump, and then connect the special tools. -
2. Bleed the air, and then turn the steering wheel several times while the vehicle is not moving so that the temperature of the fluid rises to approximately 50 - 60°C (122 - 140°F).
3. Start the engine and idle it at 1,000 ± 100 r/min.
4. Fully open the shut-off valve of the pressure gauge.
5. Turn the steering wheel all the way to the left or right; then check whether or not the retention hydraulic pressure is the standard value.

Standard value: 8.3 - 9.0 MPa (1,209 - 1,309 psi)

6. When not within the standard value, overhaul the steering gear box. Remeasure fluid pressure.
7. Remove the special tools, and the tighten the pressure hose to the specified torque.
8. Bleed the system.