Open Center vs Closed Center

[LD1]

I know its been a few days, but any resolution.

MY thoughts....

Rear remote isnt float, rather detent. Cause as others mentioned, if it was float, the loader wouldnt work.

But that is a good thing. That is what you want to supply a loader off the remote.

But as long as that remote is in detent and loader hooked, it shouldnt overheat because the loader valve SHOULD be an open center valve and just pass oil through with no resistance.

So the problem I think is the loader valve is a closed center valve. And with the remote detented in yes it will over heat..

Other than that, something could be plumbed wrong. Without some pictures, (or a hand drawing of hose routing) its hard to say. Likely an old tractor with several owners and many hands working on it over the years. Hard to even guess at what someone else has done with nothing more than a vague description.

 

[Imaybail]

I think this is what is going on, with a closed center loader valve. Maybe we can convert the valve to an open center by removing a plug on the valve.

 

[CincyFlyer]

I think this is what is going on, with a closed center loader valve. Maybe we can convert the valve to an open center by removing a plug on the valve.

If the system is open center (free flow of fluid past the valve until it's activated) then your pump will be "dead-headed" against the valve all the time; this would be noticable, I'd think.

 

[LD1]

If the system is open center (free flow of fluid past the valve until it's activated) then your pump will be "dead-headed" against the valve all the time; this would be noticable, I'd think.

Not all the time.

Loader is hooked to the remote.

So it would only be deadheaded when the remote were activated.

Which is exactly what he said its doing. Overheating when remote activated.

 

[Zebrafive]

Is it possible the loader valve, if an open center, is too small for the flow of the pump and that is what is heating up the system?
Would it make any difference, if an open center loader valve, if the hoses from the tractors SCV are hooked up backwards?
Meaning pressure is being sent to the loader valves return and the loader valve's pressure port is being as the return to the tractor.

I agree the tractor's SCV can not be in "float" and have the loader work at all. It must be in "flow" position

 

[Tx Jim]

Oil heating could be caused if FEL valve relief valve pressure is set lower than tractor pressure. I don't know if attaching in/out hoses in reverse on FEL valve would cause oil to heat.