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Hot PSC steering pump
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<blockquote data-quote="patooyee" data-source="post: 275156" data-attributes="member: 483"><p>I don't know what would happen with the P and T ports reversed on an orbital. A closed center orbital would be dead-heading the pressure line which would result in the pump instantly going into max bypass mode. I have intentionally done this in the past for testing purposes and every time I have the pump screams like hell and heats up within seconds. After a minute or two I would imagine that it would be too hot to touch but I've never let it run that long.</p><p></p><p>I don't know if its possible that you could have a closed center ram and the suspension / steering setup is adding some input to the system from the road that is causing it to return some, but not all, of the fluid back to tank? That might explain how one could have a closed center orbital, which would cause the pump to largely bypass most of the fluid while not screaming like a banshee? You could verify by jacking the front end off the ground and running it without steering in that case. If it screams it closed center. I honestly don't know though. I'm just throwing out theories at this point. I've never owned a closed center orbital to know for sure. (Most of us haven't as they have no place in a 4x4 steering system.)</p></blockquote><p></p>
[QUOTE="patooyee, post: 275156, member: 483"] I don't know what would happen with the P and T ports reversed on an orbital. A closed center orbital would be dead-heading the pressure line which would result in the pump instantly going into max bypass mode. I have intentionally done this in the past for testing purposes and every time I have the pump screams like hell and heats up within seconds. After a minute or two I would imagine that it would be too hot to touch but I've never let it run that long. I don't know if its possible that you could have a closed center ram and the suspension / steering setup is adding some input to the system from the road that is causing it to return some, but not all, of the fluid back to tank? That might explain how one could have a closed center orbital, which would cause the pump to largely bypass most of the fluid while not screaming like a banshee? You could verify by jacking the front end off the ground and running it without steering in that case. If it screams it closed center. I honestly don't know though. I'm just throwing out theories at this point. I've never owned a closed center orbital to know for sure. (Most of us haven't as they have no place in a 4x4 steering system.) [/QUOTE]
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