Power Steering System Flushing (Saginaw with LP4 or L21 and JE4)

Power Steering System Flushing (Saginaw with LP4 or L21 and JE4)

Tools Required

J 42971 Quick Connect Release Tool

Important: Always clean the connectors and lubricate the tool end in power steering fluid when inserting the tool end into the coupling.


Important: Check all power steering system quick connect connections by trying to pull the hose assembly out of the fitting. Use a firm hand tug. Repeat the step if the connector is pulled out of the male fitting. If the problem persists, inspect and replace the hose assembly if the quick connect is damaged.


1. Remove and clean the remote reservoir before flushing the system. Refer to Remote Power Steering Fluid Reservoir Replacement (LP4 or L21 with JE3) Remote Power Steering Fluid Reservoir Replacement (LP4 or L21 with JE3)Remote Power Steering Fluid Reservoir Replacement (LP4 or L21 with JE4) Remote Power Steering Fluid Reservoir Replacement (LP4 or L21 with JE4)Remote Power Steering Fluid Reservoir Replacement (LG5 with JE3) Remote Power Steering Fluid Reservoir Replacement (LG5 with JE3)Remote Power Steering Fluid Reservoir Replacement (LG5 with JE4) Remote Power Steering Fluid Reservoir Replacement (LG5 with JE4)Remote Power Steering Fluid Reservoir Replacement (LG5 with FH4) Steering. Remove and thoroughly clean the magnet located at the bottom of the reservoir.
2. Install the reservoir.
3. Raise the front of the vehicle until the wheels are free to turn. Refer to Lifting and Jacking the Vehicle Service and Repair in General Information.





Important: Position a large container under the hose in order to catch the draining fluid.


4. Remove the fluid return hose (15) at the pump (3) inlet connector.

Notice: Refer to Steering Wheel in the Full Turn Position Notice in Cautions and Notices.

5. Complete the following actions simultaneously:

* Run the engine at idle.
* Turn the steering wheel from right to left.
* Have an assistant fill the reservoir (10) with new power steering fluid.

6. Repeat the process until all of the foreign material is cleared from the draining fluid.
If foreign material is still present in the draining fluid, flush the individual components.
7. Install the fluid return hose (15) at the pump inlet connector.
8. Fill the system with new power steering fluid.
9. Bleed the system. Refer to Power Steering System Bleeding (Remote Reservoir) Power Steering System Bleeding (Remote Reservoir)Power Steering System Bleeding (Integral Reservoir) Power Steering System Bleeding (Integral Reservoir).
10. Run the engine at idle.
11. Operate the vehicle for approximately 15 minutes.

Important: Plug the connection on the pump.


12. Remove the pump return hose (15) at the pump inlet.
13. Add power steering fluid to the reservoir.
14. Inspect the draining fluid for foreign material.

Important: Do not reuse any drained power steering fluid.


15. If foreign material is found in the draining power steering fluid repeat this procedure. If foreign material continues to exist perform the following procedure:

1. Replace all of the hoses.
2. Repair or replace all of the power steering components.