Good afternoon and Merry Christmas! I have a John Deere 950 with loader and power steering. I'm adding a Brand hydraulics loader valve to replace the existing worn loader valve. I plan to keep the existing loader valve in place and use it for remotes in the future. The Brand valve I've purchased is configured with a power beyond port, an "in" port and an "out" port. I will be tapping directly to my hydraulic pumps outlet. My question is should I use the "out" port or the power beyond port to feed the tractor downstream from the valve? Thanks in advance for your help and consideration!
Loader valve
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ericm979
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The power beyond port should feed the downstream valves. "out" would go to the tank.
Harry in Ky
Veteran Member
Your new valve will have three ports connected to the tractor. How many ports does your old valve have, and how are they connected now?
Sorry for the delayed response! MERRY CHRISTMAS!
Some pics to illustrate what I'm trying to do.
I installed a manifold with JAC fitting to my pump outlet. This should be the in line in my new valve.
The power beyond outlet on the new loader valve should feed the banjo fitting in the tractor that was connected to the hydraulic pump outlet? (Lower line with blue trace)
I added a quick detach line to the existing loader valve to feed my backhoe. Should I tap into that with the "out" line from the new loader valve?
Gratuitous Pic of my rig chained up for today's snowfall. Merry Christmas
Some pics to illustrate what I'm trying to do.
I installed a manifold with JAC fitting to my pump outlet. This should be the in line in my new valve.
The power beyond outlet on the new loader valve should feed the banjo fitting in the tractor that was connected to the hydraulic pump outlet? (Lower line with blue trace)
I added a quick detach line to the existing loader valve to feed my backhoe. Should I tap into that with the "out" line from the new loader valve?
Gratuitous Pic of my rig chained up for today's snowfall. Merry Christmas
Harry in Ky
Veteran Member
Does your tractor have power steering? That ties in here as well.
As I see it, the loader is (soon to be was) operated with the factory remote valves. The power beyond port of that valve now supplies the backhoe circuit. The hydraulic pump outlet is connected to a hose leading where currently? Would that be the power steering priority valve? Your plan is to route that hose to the new valve "in" port, then the power beyond port of the new valve will go to where this hose goes now? If I have that right, then it looks like a go to me. All that's left is to add a tee on one of the sump connections for the tank port on the new valve.
As I see it, the loader is (soon to be was) operated with the factory remote valves. The power beyond port of that valve now supplies the backhoe circuit. The hydraulic pump outlet is connected to a hose leading where currently? Would that be the power steering priority valve? Your plan is to route that hose to the new valve "in" port, then the power beyond port of the new valve will go to where this hose goes now? If I have that right, then it looks like a go to me. All that's left is to add a tee on one of the sump connections for the tank port on the new valve.
Harry in Ky
Veteran Member
Power Beyond Option Parts | Cross Mfg.
The power beyond sleeve prevents subjecting the exhaust or return passages and spool seals of the control valve to back pressure.
Maybe this will help.
If you look at your current two spool valve you will see it has three lines. That's the way any series plumbed open center valve should be. If you add another valve in series with with you now have it should also be done that way. When you operate the valve, oil flows out to whatever, and oil return through the other work port. That oil returning should have a pathway to sump, not be forced into the next valve in series. Hydraulics 101.
In fact, your backhoe valve should be as well, but apparently isn't. You've been lucky there so far.
K5lwq
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The Backhoe most likely is the last valve in use when it is hooked up therefore does not use Power Beyond but a tank port. The OP is in no danger using the backhoe.
All other valves up stream and when the backhoe is off will need a tank port so the oil will have a path back to tank when you use that valve.
All other valves up stream and when the backhoe is off will need a tank port so the oil will have a path back to tank when you use that valve.
Harry in Ky
Veteran Member
I don't think so based on his photos. It looks like the power beyond port of the remote valve leads to the backhoe supply line and the return must go to the lift system. At least that's what I got from the pictures. Maybe I'm wrong. Maybe the lift isn't operable with hoe attached? Some are, some not. If it's not used then it doesn't matter.
K5lwq
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You are correct that the remote valve power beyond would feed the backhoe. But the 3pt valve is open center and the backhoe tank line will pass thru 3pt valve to the tank. He should not use the 3pt with a backhoe on.
When the backhoe is off he will use a loop line to complete the circuit allowing the 3pt valve to work.
When the backhoe is off he will use a loop line to complete the circuit allowing the 3pt valve to work.