Don't waste money on teflon/nylon rings or a new power steering hose. There is a cheap simple fix for a leaky power steering connection.
Ford uses several different connections. The one that gives the most problems is the one that uses a thin plastic O-ring to seal between between the threads of the male fitting on the end of the hose and the female fitting of the pump. Those O-rings are hard to find, are difficult to install because they have to be pre-stretched and are usually only good for a one-time installation (can't be reused if taken apart). And they only seal between the threads. If your connection also leaks between the steel line and the fitting on the end of it (inevitably it will), most mechanics will tell you it's time to replace the entire hose. Don't believe them.
Those hose connections (the kind that use the thin plastic O-rings) are designed to still be able to turn when everything is tight and have a seal between the steel tube and fitting that can't be replaced. The tube, where it protrudes from the fitting, has a conical shape that deceivingly looks like it is intended to mate with a similar surface inside the fitting of the pump, but in reality doesn't come in contact with anything. The only seal is what is inside the male fitting and tightening the hell out of it won't do any good. There's no need for the hose to turn and it's a dumb design, but it can be fixed.
I did away with the need for a plastic O-ring and simultaneously fixed the leak between the steel tube and male fitting of my hose assembly by simply inserting a thick beveled washer (the kind used to repair bathroom water taps) in the female fitting of the pump. I slightly beveled the hole of the washer so that when I screwed on the male fitting, the conical projection of the steel tube would force it out rather than cut thru it. When I tightened the fitting, the washer squished and made a perfect seal with both the conical end of the steel tube and the threads. The power steering hose no longer turns freely on the pump, but who cares. It basically cost me nothing.
Last edited by Carl Huber; 05-25-2011 at 08:45 PM.