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Tech & Fab
Full hydro steering, unequal length tie rods causing major handling problems?
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<blockquote data-quote="urbex" data-source="post: 762471" data-attributes="member: 15915"><p>It's my understanding that the return/tank port on the orbital is blocked unless steering input is put on it from the steering wheel, and all exhaust fluid runs through the PB port. Then likewise, when steering is occuring, the PB port is blocked, and the tank port becomes the exhaust. At least in my head, it seems like even if it was back feeding pressure like that, it would be feeding pressure on both sides of the ram, more or less cancelling it out anyways?</p><p></p><p>Though I'm not any kind of hydraulics expert, and never really dealt with it outside of the simple system that runs the loader on my tractor. I only learned this after initially just plugging the PB port on the valve ('cause the Bible said I could, lol) then had an issue with the pump dead heading. </p><p></p><p>Though I had also wondered if using a PB valve without actually using the PB function might be causing other issues, such as maybe a bit of a delayed response in the steering while the pressure/exhaust valves get shuttled back and forth internally, causing me to basically be in a constant state of overcorrection on the steering? I've considered buying a different non PB valve to try, but I really dislike just throwing parts at a problem and hoping it gets fixed without an understanding of why. Especially when those parts are a few hundred bucks, lol. </p><p></p><p></p><p></p><p>I sure hope not! Though I'd rather find it was something that stupid simple than have to reengineer the whole system, lol. I drove the truck the axles came out of for a while without an issue, and I've been all over the front after putting it in the Sammy checking for slop in the bearings and heims several times. One of the wheel bearings did have a tiny bit of play in them at first that I tightened up.</p><p></p><p>I'll get in there and dial some more toe in to it this weekend and see what happens.</p></blockquote><p></p>
[QUOTE="urbex, post: 762471, member: 15915"] It's my understanding that the return/tank port on the orbital is blocked unless steering input is put on it from the steering wheel, and all exhaust fluid runs through the PB port. Then likewise, when steering is occuring, the PB port is blocked, and the tank port becomes the exhaust. At least in my head, it seems like even if it was back feeding pressure like that, it would be feeding pressure on both sides of the ram, more or less cancelling it out anyways? Though I'm not any kind of hydraulics expert, and never really dealt with it outside of the simple system that runs the loader on my tractor. I only learned this after initially just plugging the PB port on the valve ('cause the Bible said I could, lol) then had an issue with the pump dead heading. Though I had also wondered if using a PB valve without actually using the PB function might be causing other issues, such as maybe a bit of a delayed response in the steering while the pressure/exhaust valves get shuttled back and forth internally, causing me to basically be in a constant state of overcorrection on the steering? I've considered buying a different non PB valve to try, but I really dislike just throwing parts at a problem and hoping it gets fixed without an understanding of why. Especially when those parts are a few hundred bucks, lol. I sure hope not! Though I'd rather find it was something that stupid simple than have to reengineer the whole system, lol. I drove the truck the axles came out of for a while without an issue, and I've been all over the front after putting it in the Sammy checking for slop in the bearings and heims several times. One of the wheel bearings did have a tiny bit of play in them at first that I tightened up. I'll get in there and dial some more toe in to it this weekend and see what happens. [/QUOTE]
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Full hydro steering, unequal length tie rods causing major handling problems?
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