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2005 Ford F350 6.0L Power Steering Issue

2.2K views 3 replies 3 participants last post by  Hydro  
#1 · (Edited)
Hello, folks! I'm new to the forum and I am hoping I can find answers to my problem.

We purchased a 2005 Ford F350 6.0L . Lariat (Super-Duty Turbo Diesel )a couple months ago, and have been having very aggravating issues with the power steering. The pressure hose from going from the hydro boost to the power steering was leaking. We changed that hose, but still had the same P/S problems. Decided to change the P/S pump, with a cardone pump. Same thing is still happening. Can't seem to be able to properly bleed the system\, no matter what we do. It works fine when reving the engine, but the steering wheel is really, really stiff a low speeds, like when trying to park. Yesterday, we discovered that when trying to bleed, we can feel weird air bubbles in the lines leading to the ABS module, but nothing in the P/S lines. Can't figure this one out for the life of us. Why would air in the ABS system be affecting the P/S??? Diesel engines are totally new to us, something we've never worked on before. Could somebody please enlighten us about the issue. Is there something we are missing, something we don't understand about the system?? It seems to be like the steering binds up, but not all the time. Sometimes it acts normal and free, sometimes it seems to jam up?? There are no regular power steering noises like in a regular gasoline vehicle, no whine or anything. Any help would be greatly appreciated, thank you!!!
 
#2 ·
There is no connection between the steering hydraulics and the ABS on that truck . Two separate systems .

Most of the time getting the air out of the steering system is caused by the remote mounted reservoir . Return oil is drawn from below the reservoir , so any air in the system gets recirculated , and does not easily come into the reservoir . The air will "foam up " the oil and takes a while to settle out . Return oil from the Hydro-Boost does goto the reservoir -- but only when you release the pedal

Other than the Hydro-Boost replacing the vacuum boost -- the brake system works the same -- gas or diesel . So any air in the brake system would be diagnosed the same . Leaking master cylinder seals most likely

Jack the front axle and remove the steering link . Can you move the wheels by hand to the full extents ? Check those ball joints for slack while you have the axle up .
 
owns 2006 Ford F250 Lariat FX4
#3 ·
So after replacing the line, what process did you use to bleed the air out of they system? I still suspect it's a bleeding issue and not a ball joint issue but due to the fact you don't have a whine noise from the PS, I'm not so sure. To properly bleed the air out of the hydro-boost system requires some specific steps. There are some other methods out there but one that I've used is tried and true, but takes a lot of time.
 
#4 ·
The problem is entrapped air in the oil , and the location of the return line causing the air to be pulled into the inlet of the pump
it takes time for the air bubbles to separate from the oil after they are mixed in by the pump
 
owns 2006 Ford F250 Lariat FX4