Bleeding Power Steering w/Hydroboost???

[DieselSJ]

You need to bleed the hydro as well. Pull the return line where the hydro returns to the pump and stick it into a bucket. With the engine running, pump the brakes. You will see that every time you release the pedal you will get fluid out of the return line. Do that until each time it squirts you get a nice stream, then reinstall the return line. Now you can go ahead and bleed the steering box as normal.