Fluid Pressure Check

INSPECTION OF FLUID PRESSURE





1. Assemble Special Service Tools (SST) (OK210 323 AAO or equivalent) as shown in the image, and tighten its fittings.
Tightening torque: 29 - 36 ft. lbs. (39 - 49 Nm)

2. Disconnect high-pressure hose from pump, and connect SST (OK210 323 AAO) between hose and pump.

NOTICE: Before disconnecting hose, place marks at connections for proper reinstallation.

3. Bleed air from system. (Refer to Power Steering Fluid Bleeding)





4. Open gauge valve fully. Start engine and turn steering wheel fully left and right to raise fluid temperature to 122 - 140°F (50 - 60°C).

NOTICE: If valve is left closed for more than 15 seconds, fluid temperature will increase excessively and damage oil pump.





5. Close gauge valve completely. Increase engine speed to 1,000 - 1,500 rpm and measure fluid pressure generated by power steering pump. If pressure is below specification, replace power steering pump assembly.
Power steering pump fluid pressure: 1067 - 1138 psi (7358 - 7848 kPa)

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

7. Turn steering wheel fully to left and right and measure fluid pressure generated by gear housing. if pressure is below specifications, replace gear housing assembly.
Gear housing fluid pressure: 1067 - 1138 psi (7358 - 7848 kPa)

NOTICE: If steering wheel is kept in fully turned position for more than 15 seconds, fluid temperature will rise excessively and damage oil pump.

8. Remove SST (OK210 323 AAO). Replace and tighten high-pressure hose. Tighten to specified torque.
Tightening torque: 29 - 36 ft. lbs. (39 - 49 Nm)





9. Bleed air from system. (Refer to Power Steering Fluid Bleeding)