Fig. 16.9. Checking the pressure generated by the power steering pump
2. Bleed the hydraulic power steering drive, then start the engine and turn the steering wheel several times so that the fluid temperature rises to 50-60°C.
3. Increase the engine speed to 1000 min⁻¹.
4. Close the special tool valve and measure the pressure.
Fluid pressure generated by power steering pump: 9.8 MPa
Warning: Do not keep the special tool valve closed for more than 10 seconds.
5. If the maximum pressure does not correspond to the nominal, replace the pump.
6. Check the hydraulic system pressure without load with the shut-off valve fully open.
Nominal pressure value: 0.3-0.8 MPa
7. If the measured pressure value does not correspond to the nominal value, the steering gear or hydraulic system hoses may be damaged.
8. Open the shut-off valve completely.
9. Turn the steering wheel fully left or right and measure the steering gear holding pressure.
Nominal pressure value: 9.8 MPa
10. If the measured pressure does not correspond to the nominal, replace the steering gear and re-measure the pressure.
[The article is based on data from the website: MitsubishiMan]
11. Remove the special tools and connect the discharge hose to the pump, tightening the hose union nut to the specified torque.
Tightening torque: 17 Nm
12. Bleed the air from the power steering hydraulic drive.