Adding Rear Spool Valve to PB port with 3rd Function Downstream.

[Woodstock Walt]

Alright guys, I need some help with this project I'm working on. I've read and researched and tried everything I can think of, and still can't get this setup to operate properly.

I currently have the W.R. Long 3rd Function kit installed on my tractor powered by the PB port off the loader.

I'm trying to add rear spool valves to operate a hydraulic top link and side link.

This is the valve I'm using:

https://www.tractorsupply.com/tsc/p...psi-1500-3625-psi-relief-setting?cm_vc=-10005

4 ports on the top for the lines to the cylinders.

1 port on one side labeled "P".

2 ports on the other side labeled "T" and "N".

How do I properly plumb this into my Power Beyond port and still have pressure continue to the 3 pt. hitch and 3rd function kit when the spool valve is not in use?

I hate to admit it, but I am on my third day now of trying to get this setup to work correctly and am ready to start pulling my own hair out. Nothing I've tried has worked correctly. Either the spool valve will be powered and the 3rd function and 3 pt. hitch will not be, or vice versa.

The PB port on the loader should plumb into the P port on the valve body correct?

Should the T and N ports on the valve body both be plumbed into the tank line? Should one of them be plumbed into the 3rd function kit?

Where should my 3rd function kit be plumbed in to work correctly?

 

[ptsg]

You'll want to connect the system this way: Loader valve > third function > remote valve > 3 pt hitch.

The PB line from the loader valve, goes to the P or In port of the 3rd function valve. The T line of the third function valve will go to the P port of the new remote valve. The PB port with the proper PB sleeve for the new remote valve will feed the 3 pt hitch. The T port of the remote valve must be connected to the tank/transmission housing or with Tee fitting to the Tank line of the loader valve, whatever it's easier to do.

To mount the PB sleeve in, you must take the plug on the N port first.

Hooking the system this way, will make every function work as desired.

The power beyond sleeve looks like this one in this picture (ignore the name of the picture, it's for a bigger valve):

Attachments

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  P80 Carry Over Plug_73L.jpg

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[old and tired]

So the ad says it can be Power beyond or closed available. Normally, you need to add a plug for Power Beyond, Have you insert that?

{EDIT} Yea, ^^^^ what he said

 

[Woodstock Walt]

You'll want to connect the system this way: Loader valve > third function > remote valve > 3 pt hitch.

The PB line from the loader valve, goes to the P or In port of the 3rd function valve. The T line of the third function valve will go to the P port of the new remote valve. The PB port with the proper PB sleeve for the new remote valve will feed the 3 pt hitch. The T port of the remote valve must be connected to the tank/transmission housing or with Tee fitting to the Tank line of the loader valve, whatever it's easier to do.

To mount the PB sleeve in, you must take the plug on the N port first.

Hooking the system this way, will make every function work as desired.

The power beyond sleeve looks like this one in this picture (ignore the name of the picture, it's for a bigger valve):

Attachments

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  P80 Carry Over Plug_73L.jpg

  76 KB · Views: 318

Ah, gotcha. I've been trying to plumb the remote valve in before the 3rd function.

Here's what I've currently got going on:

The "P" port on the remote valve is the one closest to the loader controls.

The "N" port is on the inboard side on the rear and "T" on the outboard side.

I have the SAE 10 o-ring fittings inserted into the "N" and "T" ports with 1/2" JIC lines connected. Will these serve the same purpose as a "Power Beyond" plug?

So the ad says it can be Power beyond or closed available. Normally, you need to add a plug for Power Beyond, Have you insert that?

{EDIT} Yea, ^^^^ what he said

Thank you! Yeah, like I said above ^ I've got those SAE 10 o-ring fittings hooked to 1/2" JIC lines, should serve the same purpose, right?

 

[LouNY]

No, it needs a power beyond fitting installed in the "N" port then one of the "T" ports needs to return to the tank (reservoir).
The purpose of the power beyond plug is to isolate the returns to tank from the high pressure fluid path.

 

[ptsg]

Ah, gotcha. I've been trying to plumb the remote valve in before the 3rd function.

Here's what I've currently got going on:

The "P" port on the remote valve is the one closest to the loader controls.

The "N" port is on the inboard side on the rear and "T" on the outboard side.

I have the SAE 10 o-ring fittings inserted into the "N" and "T" ports with 1/2" JIC lines connected. Will these serve the same purpose as a "Power Beyond" plug?

No, because the way the PB sleeve/plug interfaces on the valve, it's how it gets the flow to downstream valves. The way you have it right now, it's bypassing internally to the tank port.

 

[Woodstock Walt]

No, because the way the PB sleeve/plug interfaces on the valve, it's how it gets the flow to downstream valves. The way you have it right now, it's bypassing internally to the tank port.

No, it needs a power beyond fitting installed in the "N" port then one of the "T" ports needs to return to the tank (reservoir).
The purpose of the power beyond plug is to isolate the returns to tank from the high pressure fluid path.

Gotcha, that's definitely my problem then...

Thanks guys, I'll get a power beyond plug installed and route it as described and report back.

 

[LD1]

I see two TEES in one of the hoses on the loader valve and one TEE in the other hose.

YOU CANNOT HAVE TEE'S IN AN OPEN CENTER SYSTEM.

PTSG gave you the correct routing in the second post.

The ONLY tee you should have in your system is a SINGLE tee to connect the T port of the new remote valve. I didnt see your 3rd function valve, but I assume its an electric valve and those do have a pressure rated T port so no PB required.

You should have a hose coming from the pump to the loader P port. NO TEES
Coming out of the loader valve PB port should be a hose going straight to your 3rd function P port. NO TEES
Coming out of the 3rd function T port should go straight to the new remote valve P port NO TEES
Coming out of the new remote valve PB port (when you get the correct PB cartridge) should go straight to the 3PH feed NO TEES.
Now all that is left is the T port of the new valve. It needs a hose returning to tank somewhere. IT CAN be tee'd into an existing tank line. Follow the hose coming off the T port of the loader and see where it goes and where is the best place to tee into it.

Dont confuse the T port on the 3rd function as a tank line that can be TEE'd. Because in this setup its actually acting as a PB hose.

 

[Gordon Gould]

I don't want to confuse the issue here but I have a question. Assuming the 3rd function valve has an out port that is able to take pressure ( I think they do in a proper system since the OUT port is not generally to the tank but to the 3ph ) why cant his new valve be plumbed with the loader PB going to the new valve IN and the new valve PB going to the 3rd function IN, The 3rd function OUT to 3ph. The new valve T would be teed into the loader valve T.

You both said it should not be done this way. I am just wondering why. There is something there I don't understand. Thanks.

gg

 

[ptsg]

I don't want to confuse the issue here but I have a question. Assuming the 3rd function valve has an out port that is able to take pressure ( I think they do in a proper system since the OUT port is not generally to the tank but to the 3ph ) why cant his new valve be plumbed with the loader PB going to the new valve IN and the new valve PB going to the 3rd function IN, The 3rd function OUT to 3ph. The new valve T would be teed into the loader valve T.

You both said it should not be done this way. I am just wondering why. There is something there I don't understand. Thanks.

gg

No other reason other than line routing but would still work just fine. Doing that way, would mean that you would have unnecessary lines going back and forth. With the third function right after loader, the PB from the loader, goes straight to the 3rd function and the OUT of the 3rd function goes to the new remote valve, often mounted towards the rear of the tractor.