1996 Power Steering operation?
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From: Outside Providence, RI
1996 Power Steering operation?
I'm guessing that the power steering pump doesn't "know" where it's sending the hydraulic fluid and the gearbox has no idea where it's coming from. So I was wondering if there was a manual or diagram on the internet somewhere that would show me how things change when you turn the steering wheel and thereby "call" for more power assist. I'd also like to know what route the (continuously produced?) hydraulic fluid takes when the steering wheel is "straight ahead" and almost no assist is needed. Is there a shunt or cutoff that reduces engine load when assist is not needed? Many thanks.
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Senior User
Joined: Nov 2009
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From: Outside Providence, RI
With the 2011 trucks switching to electric assist power steering, how does this change things? I'd love to see an internal diagram that shows how the flow of the fluid is routed. The new set-up must have some way of determining when the spool valve opens so the electric pump kicks up in output.
Hotshot
Joined: Oct 2002
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From: The Big, Oregon
Well, I haven't had a chance to deal with Ford's system, but I have dealt with other electro-hydraulic power steering systems. Usually they operate one of two ways: Constantly like a standard hydraulic system, or intermittently on demand. The only change for the constant ones is the power source for the pump, although some did use a different fluid that in some cases is extremely hard to find now.
There are a few different types of intermittent systems, but most employ some sort of sensor to determine how fast and how far the steering wheel is being turned, then cycling the pump to provide assist through a fairly standard valving setup. These systems usually cut out or at least significantly reduce output at higher speeds.
There are a few different types of intermittent systems, but most employ some sort of sensor to determine how fast and how far the steering wheel is being turned, then cycling the pump to provide assist through a fairly standard valving setup. These systems usually cut out or at least significantly reduce output at higher speeds.
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