Tractor loader hydraulics

[Hall99m]

Hi, I have bought a quicke 2000 front loader for my TCE 55 new holland tractor. I am unsure where the hydraulics should be connected, I have limited knowledge of hydraulics but I assume a 'feed' and 'return' connections are needed. The tractor has two sets of remote hydraulics connections on the rear. I could use a pair of those but then that would only leave one function for rear implements. I have had a look at the main hydraulic block and have found the feed and return pipes to the remote hydraulics, could a simple T piece be added there to give a feed and return to a front loader? Any advice would be much appreciated.

 

[Wisconsonian]

IF you use one of the remotes, that function will have to be activated to use the loader valve. That's assuming the loader has it's own valves? And assuming this is open center hydraulics like a little NH would be here.

You'll need a "power beyond" kit in order to run the loader and have the remotes usable. A tee will not work.

 

[Fendtbro]

If a gear pump, take oil from pump main feed. If two pumps working together you need to know exactly where to connect in. It will be possible to make everything work at once. dealer should know but sometimes they are hopeless and just tell you nonsense..

 

[Hall99m]

IF you use one of the remotes, that function will have to be activated to use the loader valve. That's assuming the loader has it's own valves? And assuming this is open center hydraulics like a little NH would be here.

You'll need a "power beyond" kit in order to run the loader and have the remotes usable. A tee will not work.

So would the power beyond kit fit in series in between the auxiliary control valves and the lift control valve? It is open centre hydraulics yes. The loader has it's own controls yes.

 

[Wisconsonian]

Yes, the power beyond part would go in the return end of the existing hydraulic valve (typically) and a hose run to another valve as shown in the diagram. (the diagram only shows one one way valve for some reason, there could be 2 or more two way valves in that valve block) Here is the best video I found, the power beyond should have been explained after open center and before closed center. Worth watching the whole thing to understand, but DO NOT touch the relief valve as she shows for closed center.

A power beyond valve COULD be installed in series before the existing valve stack, but then the new valve would have the power beyond to feed the existing valve. Quite simple if you understand what's going on in the valve, basically just can't have two open center valves, they have to block the flow to create pressure.

 

[Hall99m]

Thanks. So the loader control valves would go in series in between the auxiliary control valves and the lift valve? The power beyond kit is basically a set of hoses and connections?, there is such a variety available I would need to do some research as to what would be suitable. The loader control valves won't need its own pressure relief line back to the reservoir no?

 

[Wisconsonian]

No, typically the loader control supply would come from the power beyond fitting on the outlet of the existing valve.

I mentioned it could be installed both ways, as long as the first valve in series has the power beyond capability to provide pressurized oil to the second valve.

A power beyond kit may include hoses for your specific tractor and new valve, or more likely it JUST includes the power beyond "plug/fitting/adapter" shown in the video. And you'll likely have to source your own hoses.

Each valve bank will need it's own return to the reservoir for normal flow, not just pressure relief. Please study hydraulic theory enough to understand how open center valves function, and how the power beyond simply connects multiple valve stacks so they function as one. It is not difficult, and it will likely save you hassle of changing hoses around a second or third time, if it doesn't work right the first time. this is the only place I could find an explanation, perhaps it's overly technical, the concept is simply that a bank of open center valve sections assembled together needs two return paths, one that is free return to the tank, and the other that can be blocked to provide pressure. Adding two different valve banks together requires connecting both of these paths, as in your diagram above.

 

[Hall99m]

No, typically the loader control supply would come from the power beyond fitting on the outlet of the existing valve.

I mentioned it could be installed both ways, as long as the first valve in series has the power beyond capability to provide pressurized oil to the second valve.

A power beyond kit may include hoses for your specific tractor and new valve, or more likely it JUST includes the power beyond "plug/fitting/adapter" shown in the video. And you'll likely have to source your own hoses.

Each valve bank will need it's own return to the reservoir for normal flow, not just pressure relief. Please study hydraulic theory enough to understand how open center valves function, and how the power beyond simply connects multiple valve stacks so they function as one. It is not difficult, and it will likely save you hassle of changing hoses around a second or third time, if it doesn't work right the first time. this is the only place I could find an explanation, perhaps it's overly technical, the concept is simply that a bank of open center valve sections assembled together needs two return paths, one that is free return to the tank, and the other that can be blocked to provide pressure. Adding two different valve banks together requires connecting both of these paths, as in your diagram above.

Hi, many thanks for the info, I am understanding better now how the hydraulic system works I think. I have attached an altered drawing of how I imagine installing the loader valves, in between the pump and the auxiliary control valves, with the power beyond fitting on the discharge line from the loader valves feeding the auxiliary valves. And a return going back to the tank. Would this setup work? Would having the loader controls first in the system lead to problems with low flow to the other valves through the system?

 

[Wisconsonian]

Yes, that looks like it would work. The flow and pressure will be the same with both valves hooked in series either way. The loader will have priority over the existing valves that way, and I believe you'll need to set the loader valve relief valve to the same pressure as the existing relief valve, and don't do it that way if there is no relief valve on the loader valve section.

 

[Hall99m]

Yes, that looks like it would work. The flow and pressure will be the same with both valves hooked in series either way. The loader will have priority over the existing valves that way, and I believe you'll need to set the loader valve relief valve to the same pressure as the existing relief valve, and don't do it that way if there is no relief valve on the loader valve section.

Many thanks, if the loader valves don't have a pressure relief valve then should the loader valves be put in the system after the auxiliary valves not before?

 

[Wisconsonian]

Yes, I believe the first valve will protect the second, but the second can't protect the first.