Diverter to 3rd function

[Sysop]

sorry for the blurred pic.

I think it is the part between the 90 and what appears to be a spring. It sure looks to me like what J.J. posted.

This is what a PB adapter looks like.

 

[jcummins]

That item has a solid head, unlike what J_J posted.

The three items on the right go together and screw into the opening above where the hydrualic hose was attached....which we were thinking is the PB port. It's design is pressure related...to probably control fluid internal to the fel valve based upon pressure.

Given where those two hoses from the fel route to, should tell someone the correct story, but I don't know enough ....yet....to say. I wish I knew of a M7040 with 3rd function so I could look at how it's plumbed in.

 

[Sysop]

Didn't think it would be that simple... Best of luck!

 

[J_J]

It could be that whoever did the FEL job left out the PB adapter.

If you did not have PB, The pump fluid would try and take the route of least resistance, and that would be the OUT port. .

So if the remotes and 3pt work, then you have PB somewhere.

Did you determine the manufacturer of the valve?

Are you sure tr parts yu removed are not the load check.

Is there a similar port on the other side of the valve.

Most all hyd valves have load checks, usually between the work ports or close by.

A load check has a poppet, and a spring.

 

[jcummins]

It could be that whoever did the FEL job left out the PB adapter.

If you did not have PB, The pump fluid would try and take the route of least resistance, and that would be the OUT port. .

So if the remotes and 3pt work, then you have PB somewhere.

So the hose I took off, that routes to hose 050, is my PB port? If so I should simply route hoses from that port to my 3rd function valve, and back to the hose so it can continue on it's route to that hose number 050? Sounbd right?

 

[J_J]

J_J thanks....

I understand this....
Once the PB is established, run a hose from the PB adapter to the IN port of the 3rd function valve.
The OUT of the 3rd function valve then connect to the 90 degree hose you remove from the PB port.

And it was the way I was thinking all the time. I was not aware of the PB adapter though. It seems if a tractor has a PB port....the adapter should be built in, if PB is not functional without it. And, I was not aware the rear remotes runs off PB. Thought the rears had it's own setup. If a tractor with existing remotes has a fel added, the pressure line must require rerouting to the fel first.

Also, not sure I understand the plug above the hose with the elbow though. What is it's purpose?

I'll open some things up tomorrow.

The PB option makes that valve a convertible valve.

Originally, you tractor did not have a PB port, and the pump fed the remotes and 3pt with pressure.

So any valves installed in series should have a PB port.

The valve with just a plug in the PB port is just an open center hyd valve and will work fine if it is the last valve in the series flow.

Same valve with a PB adapter allows the valve to pass the pump flow downstream and can withstand pressure.

Same valve with PB adapter and a plug in the PB adapter makes that valve a closed center valve.

Some valves do not have the PB option, but the PB port with adapter is necessary for other valve downstream.

The main reason for the PB port is that the OUT port is usually a low pressure port about 300 to 500 psi.

The PB port can take full pressure.

If you use that port for high pressure upward of 2500 psi, you could damage the spools

 

[J_J]

So the hose I took off, that routes to hose 050, is my PB port? If so I should simply route hoses from that port to my 3rd function valve, and back to the hose so it can continue on it's route to that hose number 050? Sounbd right?

You need the valve manual to verify that a PB adapter is available.

If you had a 5 valves in an open center hyd series circuit, the first four valves should have PB adapter installed and connected to the next valve and so and so.

Last valve does not need PB as the flow is going to tank.

 

[jcummins]

You need the valve manual to verify that a PB adapter is available.

If you had a 5 valves in an open center hyd series circuit, the first four valves should have PB adapter installed and connected to the next valve and so and so.

Last valve does not need PB as the flow is going to tank.

Have we determine that the rear remotes are driven through the fel valve? If so, the PB has to be there.
And any new 3rd function valve then has to have the PB adapter too....since the flow from 3rd function would be to the rear remotes.

Your comment....If you use that port for high pressure upward of 2500 psi, you could damage the spools....makes me think you don't believe this port is PB.

 

[J_J]

That statement was for the fact that the OUT port is only designed for about 300 to 500 psi, and if all pump flow was to pass through that port, it could damage the seals.

I am still not sure you have PB as I have not seen the PB adapters.

You haven't answered my questions about a manual for the loader, or that you have seen a PB adapter.

Who is the manufacturer of the valve?

Is there a threaded hole inside the green port?

If your remotes and 3pt work normally, then we must assume that there is an adapter somewhere.

If there is no PB adapter, the FEL valve would work fine, but pump flow and cyl flow would take the path of least resistance and go though the OUT port.

On some of the Prince valves, the PB screw in under a plugged port, and the port used for PB out will not show this. Prince LVS, and LVT valves are like this.

 

[jcummins]

That statement was for the fact that the OUT port is only designed for about 300 to 500 psi, and if all pump flow was to pass through that port, it could damage the seals.

I am still not sure you have PB as I have not seen the PB adapters.

You haven't answered my questions about a manual for the loader, or that you have seen a PB adapter.

Who is the manufacturer of the valve?

Is there a threaded hole inside the green port?

If your remotes and 3pt work normally, then we must assume that there is an adapter somewhere.

If there is no PB adapter, the FEL valve would work fine, but pump flow and cyl flow would take the path of least resistance and go though the OUT port.

On some of the Prince valves, the PB screw in under a plugged port, and the port used for PB out will not show this. Prince LVS, and LVT valves are like this.

Have no manual on loader, nor seen PB adapter.

Mfg of valve, no idea, I see nothing on valve to clue me in.

No threaded port inside green hole.



Give how the fel valve is plumbed in, th PB port should be identifiable by where those hoses go. I've identified all that, but not knowledgeable enough to still id the PB port.