Valve that detents only one direction

[MossRoad]

Wouldn't a selector valve do the same thing?

Feed the 3pt in one position and the backhoe in the other position?

 

[LD1]

Wouldn't a selector valve do the same thing?

Feed the 3pt in one position and the backhoe in the other position?

No.

It can already feed the 3ph and backhoe.

Wanting to add a valve for remote. And in order to do that, there is no way around needing a PB capable valve.

 

[Michael In Tennessee]

Just put the valve in series with the backhoe. You don't need to run the backhoe through a work port. This would be fairly normal. You can have as many series plumbed calves as you reasonably want.

 

[RickB]

Not often I ask a hydraulic question...lol. But I am on a quest to find a valve that my not exist for a specific application.

Wanting to add a remote set to a tractor that already has a backhoe installed.

Like most backhoe aux kits.....there is only two hoses. One coming from the PB of the loader, and one going on to feed the 3PH. They get away without running a PB setup on a backhoe because you cant use the 3PH with the backhoe on....which is why most manuals state to leave the lever LOWERED to not blow the backhoe valve.

Anyway....wanting to minimize cost for the person who wants this done....my Idea was as follows:
1. Use the existing line coming from the PB of the loader valve to supply the P port of this new valve
2. Use the PB outlet of this new valve to supply the 3PH on the tractor.
(those two hoses are already present)
3. Add a third hose to to Tee into a return line
4. Two new hoses from the work ports of the valve to the existing backhoe couplers.

This is to add a toplink cylinder to the tractor for a box blade. The backhoe couplings are not the typical AG couplers and they are different sizes so it can only hook up the correct way. This is no issue because I will get the right ends for the toplink cylinder.

Ideally I'd like to find a single spool valve....PB capable...10-20gpm range...and have a detent in ONE DIRECTION ONLY.

Everything I am coming up with either detents BOTH directions, or has pressure activated kickout like a logsplitter valve.

The reason I only want it to detent ONE direction is for when the backhoe is hooked up...it will just run off these "remotes". Dont like the idea of a bungee cord or potential to detent BOTH directions because the idiots that work for this guy would likely try and run it backwards and feed the backhoes T port instead of the P port.

Anyone have any leads on such a valve or have been down this road before?

The plumbing arrangement you describe will work for the backhoe and cylinder, you know that but I'll reinforce it.
Any detented valve you are likely to find generically will have a pressure kick out as you also know. I would not use the valve you seek (fully locked detent w/o pressure kick out) and here's why; when it is used to operate a simple cylinder the valve could easily remain stroked indefinitely forcing pump flow over relief and trashing the pump. I've seen it too many times with NH TN and TL tractors with dry, sticking remote cables that didn't allow the valve to return to center.
My solution would be to buy a non detented valve and use a bungee or fabricate a mechanical device to lock the valve for backhoe operation. That retains the utility and safety of a pressure sensitive detented valve to operate the cylinder and is as close to idiot proof as can be had.

 

[LD1]

The plumbing arrangement you describe will work for the backhoe and cylinder, you know that but I'll reinforce it.
Any detented valve you are likely to find generically will have a pressure kick out as you also know. I would not use the valve you seek (fully locked detent w/o pressure kick out) and here's why; when it is used to operate a simple cylinder the valve could easily remain stroked indefinitely forcing pump flow over relief and trashing the pump. I've seen it too many times with NH TN and TL tractors with dry, sticking remote cables that didn't allow the valve to return to center.
My solution would be to buy a non detented valve and use a bungee or fabricate a mechanical device to lock the valve for backhoe operation. That retains the utility and safety of a pressure sensitive detented valve to operate the cylinder and is as close to idiot proof as can be had.

I like the idea of something mechanical to lock a non-detent valve. Something clean and not hicked up like a bungee.

Excellent point about it staying engaged with the less than intelligent people that will be operating the machine

 

[ptsg]

A simple piece of flat bar with a hole on one end that will allow it to pivot out of the way and a slot on the other end that will grab the lever of the valve will work just fine, easy to use and looks good.

That's what I've been meaning to do for the remote valve on my tractor since I run the log splitter out of it and currently I'm just holding the lever with a piece of wire.

 

[K5lwq]

If he just wants to power a hydraulic top link, would it be easier to just add a electric over hydraulic valve that can handle the back pressure of the down stream valves? That way nothing else has to change. Could slow the cylinder down with flow restrictors to make more precise adjustments.

 

[LD1]

If he just wants to power a hydraulic top link, would it be easier to just add a electric over hydraulic valve that can handle the back pressure of the down stream valves? That way nothing else has to change. Could slow the cylinder down with flow restrictors to make more precise adjustments.

Thought about that. And even though you can get them rated for continuous duty....just don't like the thought of a electric solenoid on ALL day while backhoe is in use

 

[K5lwq]

Thought about that. And even though you can get them rated for continuous duty....just don't like the thought of a electric solenoid on ALL day while backhoe is in use

I was suggesting powering the backhoe off the tank port. The solenoid is for top link only. Just like you would plumb when adding third function.

 

[LD1]

I was suggesting powering the backhoe off the tank port. The solenoid is for top link only. Just like you would plumb when adding third function.

Yea, that makes sense.

Maybe I could make something like that work.

But that would require another two sets, both male and female couplers.

What you propose leaves the backhoe aux circuit in tack and adds a remote.

Wasn't really wanting that..was wanting to use the existing backhoe couplers and minimize cost.