Test the power steering system using the J 5176-D as described here. You may also use the J 25323-B .

1. Disconnect the pressure hose at the pump. Use a small container in order to catch any leaking fluid.
2. Connect a spare pressure hose to the pump.
3. Connect the J 5176-D to both hoses.
4. Open the valve on the gage.
5. Start the engine.
6. Allow the system to reach operating temperature.
7. Inspect the fluid level. Add fluid if required.
8. When the engine is at normal operating temperature, ensure that the pressure reading on the gage (valve open) is 552-862 kPa (80-125 psi). If the pressure is greater than 1380 kPa (200 psi), complete the following steps:

8.1.	Examine the hoses for restrictions.

8.2.	Examine the flow control valve for proper assembly.

9. Record a series of pressure reading using the following procedure:

Important: Do NOT leave the valve fully closed for more than 5 seconds. This action may damage the pump.

9.1.	Fully close the valve.

9.2.	Record the pressure reading each time you close the valve.

9.3.	Perform this procedure 3 times.

10. Ensure that each reading is at least 10 343 kPa (1,500 psi).

Ensure that the 3 readings are within 345 kPa (50 psi) of each other.

•	If the pressure readings are high enough and are within 345 kPa (50 psi) of each other, the pump is functioning properly.

•	If the pressure readings are high enough, but the readings are not within 345 kPa (50 psi) of each other, the flow control valve in the pump is sticking.

1.	Remove the valve.

2.	Clean the valve and remove any burrs using a crocus cloth or a fine hone.

3.	If the system is contaminated, flush the system.

4.	If the system is exceptionally dirty, then completely disassemble, clean, and reassemble both the pump and the rack and pinion gear.

•	If the pressure readings are less than 10343 kPa (1,500 psi), replace the flow control valve. Inspect the system.

•	If the pressures are still low, replace the rotor and the vanes.

11. If the pump is accurate to specification, perform the following steps:

11.1.

Leave the valve open.

11.2.

Ask an assistant to turn the steering wheel to both stops.

11.3.

Record the highest pressures.

Compare these pressures with the highest pump pressure that you recorded in the previous test.

11.4.

If the pressure at both stops is not the same as the maximum text pressure, the rack and pinion is leaking internally.

Disassemble and repair the rack and pinion.

12. Turn off the engine.
13. Remove the testing gage and the spare hose.
14. Reconnect the pressure hose.
15. Inspect the fluid level. Perform any repairs as needed.