Power steering help
Hi everyone. I’m going crazy. I’ve read almost all the forums, but I need help. 65 mustang v8 with bendix power steering. I replaced the control valve with a rebuilt one, all new hoses. It no longer leaks. But the steering goes crazy from end to end. Is it getting rid of the air? See my video.
https://youtu.be/br7Fey02vB4 |
so it was fine before the control valve replacement?
Just by looking that really seems to indicate a valve issue. I would contact the seller of the valve. |
Originally Posted by Gun Jam
(Post 8664764)
so it was fine before the control valve replacement?
Just by looking that really seems to indicate a valve issue. I would contact the seller of the valve. yea, it worked great. Just leaked... |
Right... I remember those days. The valve is responsible for feeback if I recall correct. Perhaps its built wrong or there is a faulty part in in. There isnt much else that I can think of that would induce a turn like that. i know little about them but the phrase "a ****ed up servo" is likley correct. or whatever its got that acts like a servo.
-Gun |
Originally Posted by Vikefan88
(Post 8664762)
Hi everyone. I’m going crazy. I’ve read almost all the forums, but I need help. 65 mustang v8 with bendix power steering. I replaced the control valve with a rebuilt one, all new hoses. It no longer leaks. But the steering goes crazy from end to end. Is it getting rid of the air?
A broken or misadjusted spring allowed oil pressure to be present where it did not belong, under given driving conditions. This could range all the way from an oscillating back and forth to the video condition above. Such oscillation happened on mine occasionally at road speed; It was scary, but did not jerk the wheel from my hands. It kind of "wiggled" side to side about once a second. Kicking the brake pedal stopped it. Such occurrence is is called POSITIVE FEEDBACK. ; |
Originally Posted by imp
(Post 8664814)
Original 65 PS used a control valve mounted integrally with the idler arm. The valve was spring-centered; During straight-ahead driving, the valve directed pressure to both sides of the PS cylinder at the same time, providing added guidance control. When the valve was off-centered as in turning in a parking lot, that added more pressure to the appropriate side of the cyl. piston, adding power assist. During taking curves at speed, the spring within the valve was too stiff to add any assist. It was a PRESSURE_BALANCED system.
A broken or misadjusted spring allowed oil pressure to be present where it did not belong, under given driving conditions. This could range all the way from an oscillating back and forth to the video condition above. Such oscillation happened on mine occasionally at road speed; It was scary, but did not jerk the wheel from my hands. It kind of "wiggled" side to side about once a second. Kicking the brake pedal stopped it. Such occurrence is is called POSITIVE FEEDBACK. ; |
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Originally Posted by Vikefan88
(Post 8664888)
so you recommend trying to adjust the spring to center?
Why is this system worth a SH!T? When power assist is not needed, as driving straight ahead, or turning non-demanding paths on highway, pressure is directed to BOTH sides of the power piston, enclosed in a separate tube, which "locks" the wheels together turn-wise, stabilizing steering control. Only when steering effort is great enough (as in parking) does the valve off-center to provide assist. Your question: Centering of the valve is basically mechanical. The spring tension only maintains the valve at one stop of it's travel. A front-end hit can damage the valve's ability to move properly, heat check may have weakened the spring, or it may be broken. Higher spring tension means later PS "kick-in", and vice-versa. Whew! imp |
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