Diverter to 3rd function

[J_J]

A FEL valve can have many ports.

Some older loader valves had 6 ports.

Newer loader valves have 7 useful ports.

IN port
OUT port/return port
4 work ports
1 PB port.

Some valves do not use the PB port and it is plugged and all fluid goes through the OUT port.

PB stands for power beyond.

This newer type FEL valve may use the PB port to pass fluid downstream to the next valve. In order to do this , the fluid in the valve is separated, and the pump flow is routed through the PB adapter. All cyl fluid goes through the OUT port.

This same valve can also be converted to closed center by plugging the PB port so it can be used by tractors with closed center hyd systems.

Some FEL valves have spare ports for connection convenience. Unused port are plugged.

 

[topbuilder]

What does your FEL valve look like? Can you replace the 2 spool valve with a three spool valve?

 

[J_J]

Why would he want to replace his FEL valve for a three spool valve.

He already has a diverter valve, a 3rd function valve, and the knowhow to install same.

 

[topbuilder]

That puts all three levers where he needs them. No need for power beyond/open center/closed center discussion.

 

[J_J]

I believe this is the valve you are talking about.

3 SPOOL 25 GPM JOYSTICK LOADER VALVE W/GRAPPLE

It might be a good choice if you had no FEL valve.

However it is a 25 GPM valve, and you should match the valve to the pump flow.

 

[kennyd]

What does your FEL valve look like? Can you replace the 2 spool valve with a three spool valve?

The valve body is shown in all the pictures, it's mounted below the operators station and cable operated.

 

[jcummins]

Other issues came up, but trying to get back to this project this afternoon.

I opened up what we think is the PB outlet, and the black nut just above it. Pictures below of both. The hose adapter is nothing more than a jic to oring hydraulic connector. The nut has a recessed hole in it that a small pin with a flared washer type bottom slides into with a spring between them....something pressure related?...but not sure it's related to the PB, unless it handles the requirement for a PB adapter.

I do not see anything that looks like the PB adapter you spoke of J_J.

The hose I took off, traces back to the rectangle box I spoke of. From there one routes to the casting immediately below the rear remote valves, the other goes back into the tractor at the very top of the body.

It would appear the line I took off, feeds the rear remotes....or the rear remotes feed the FEL valve. From J_J's post, it feeds the rear remotes. This means, that the PB adapter...has to be there somewhere, or the rear remotes wouldn't work?



sorry for the blurred pic.

 

[J_J]

The other PB adapter looks this.

 

[J_J]

Looking at your tractor hyd, I see the pump feeds a bracket with two fittings which are coupled together with a U shaped tube. If you have a FEl valve, the coupling tube will not be there. Feed tube is item #10, and comes directly from the pump..

With no FEL, I believe this loop feeds back to the side of the tractor, and maybe the remotes, which I can not confirm.

It stands to reason that to add a FEL valve, the pressure line is used to feed the FEL, and the PB from the valve comes back to that bracket with the two fittings, and then goes back to the side of the tractor.

The feed line from the pump is item #50.

The PDF is to large to post, so if you go to Kubota Parts | Full Service online retailer.

Enter your tractor data, and select hydraulic, and they will send you the PDF in minutes.

Can you verify the other ports on the valve?

The IN port usually has the relief valve close by.

The OUT port will connect back to tank, and you may see some tees in that line.

Then you have the four work ports.

Only port left should be the PB and it should have something in it to separate the galleries so the PB fluid will pass downstream,and the cyl fluid only goes through the OUT/return port.

Can you take a better picture of those parts that came from that port.

One PB adapter is a sleeve type fitting as in the first picture.

The other PB adapter is only a single 1/4 in plug and fits down inside of the port. Are there threads on the inside bottom lip.

 

[jcummins]

The loop is not there, instead the line 050 connects to the line I removed on the green marked port on the FEL valve, that we was thinking was the PB port. The other line at the loop goes to the line behind the 4 work ports. You can see that line in the first picture in this thread. The 7th line, is shown in the 2nd picture on this thread, that come in near the top of the valve, and next to it, does appear it could be a relieve valve, and from your description this is the IN port. It is a larger metal line and goes back only a short ways then into the side near the top of the tractor.

So in my way of thinking, we have id the IN port, and the 4 work ports, we have the bottom line on the fel connecting to line 050, and the other line connecting to 010. 7 ports on the fel valve is all there is, right?....BUT I don't see anything that looks like the PB adapter from the line I took off.