John Deere 2040 with Open Center valve on FEL

[Tx Jim]

I am guessing you found a CC plug for his valve.

521 parts shows a fitting that fits in the side of FEL control valve that resembles a CC conversion plug BUT I can't locate that plug in Jimmy's photos.

 

[Zebrafive]

While I’m draining the fluid, I’ll pull the lines from the valve to try to get more info on it.

I did get the rear remotes back - for now, I’ll just clean them up and store them in the barn. This is how I got them...

While draining fluid, take the line from the loader valve to the rockshaft cover (return line for loader valve) and your filter cover to hydraulics shop. Tell them you want fitting(s) to connect that hose end to the port on the filter cover.

Also get a "T" for the PCV and a cap (for until you install the rear SCV (remote)

For the rear remote that was returned; did you get line key 6 too? That connects the remote to the PCV. They would have taken it off too. It's a $70 part. First drawing, key 3 second drawing. T goes between key 3 &4. Cap the end until you reinstall the rear remote.

I'd estimate the rear remote with quick coupler is worth $500+

 

[Zebrafive]

521 parts shows a fitting that fits in the side of FEL control valve that resembles a CC conversion plug BUT I can't locate that plug in Jimmy's photos.

With the valve in the mounting box, and the return hose going over the top, it's hard to tell if that port is there. I suspect, they plugged it.
Did you find a CC plug? P/N?
If you did KUDOS! a CC plug would solve his problem.
Then he needs to get the water flushed out and hope the brake linings survived.

 

[Tx Jim]

I located a plug(AW17949) but I think its not a CC valve conversion adapter.

 

[Zebrafive]

I located a plug(AW17949) but I think its not a CC valve conversion adapter.

I do not think it's CC conversion plug either. I'll bet his valve has it and they plugged it, since CC does not have a place for it's connecting hose. So having a hose, it can't be a CC conversion plug.

If we knew the valve maker, a CC conversion plug might be found.

I would pull the valve and try to determine who made it.

 

[Tx Jim]

I suggest to perform my simple test before disconnecting hoses or removing valve

 

[Jimmy_G]

Well, I finally managed to perform the test - and shot milky white hydraulic fluid everywhere. Good news is now we know for sure...
I also took a closer look at that valve and think I see the plug/port that Tx Jim actually referenced.

I’ll get a fluid change and start planning for re-routing these lines as described above before I fill it back up...

Gonna add a few pictures of the valve for reference - maybe you recognize one of the numbers?

 

[Tx Jim]

Jimmy
You have made some great progress on diagnosing your tractor's hydraulic problems. I don't have any experience with that particular hyd control valve but I wish you would remove the cap in photo & post photo of it's threaded area. Have you checked control valve body for any numbers that might ID it? Parts schematics I can locate shows plug on your FEL control valve not to be a closed center conversion plug with inner seal(item 19) similar to 2nd photo. W25405(4th photo) may be the correct part # for the CC conversion plug. I also recommend removing check valve in 3rd photo that was in place when valve was utilized for open center hyd systems(3rd photo)

 

[Zebrafive]

I am thinking it's Cessna valve. Maybe W25405 is CC conversion plug?
P/N AW20889 is the CC non-convertible valve.

 

[Jimmy_G]

Please see picture of back of the valve as well as the plug.

note that there is also a plug on top of the valve. Not sure what that is but I have shown it in the last picture.

 

[Tx Jim]

I think plug in your last photo holds a pressure relief valve in place. When looking inside the control valve at orifice in photo can you see a seat inside valve housing that an o-ring(item 10 2nd photo) could be utilized for sealing when a closed center conversion plug is utilized? I found no valve match Googling numbers on valve body in your photos.

 

[Zebrafive]

It looks like they just pulled the part number AW17949 (see post #64) and replaced it with a plug. I think you need P/N W25405 TxJim found earlier.
Or a plug similar to this

 

[Jimmy_G]

I think plug in your last photo holds a pressure relief valve in place. When looking inside the control valve at orifice in photo can you see a seat inside valve housing that an o-ring(item 10 2nd photo) could be utilized for sealing when a closed center conversion plug is utilized? I found no valve match Googling numbers on valve body in your photos.

Tx Jim, I think you are right - I think I see a seat in there. See pictures and let me know what you think.

 

[Tx Jim]

Yes sir I think a closed center conversion plug with correct inner seal will correct your tractors hyd problem. I found that fact out the ""hard way"' back in the 70's when I served as a JD dealer service manager

 

[Jimmy_G]

Thank you much to you guys. I’ve ordered the correct part (I hope) online, and will be waiting for it to come in. I’ll update when it gets here and I try it out. Looks like some time to spend cleaning this thing up and re-plumbing the mess that is these hydraulics...

 

[Zebrafive]

What P/N did you order?
If it turns out to be the wrong part. Try finding the complete CC valve, P/N AW20889. I've seen posts where a guy buys a JD loader, and it comes with a CC valve and he needs OC.
You would want to get key 21, P/N AW17949 to put back in your valve. Maybe the guy that sold you the tractor has this part?

 

[Jimmy_G]

Update time.... I purchased the cc conversion plug on eBay and it arrived yesterday so I installed to test, and it did not work.

I'll pull it all down again next week, when my new hydraulic filters come in and I can change the oil (hopefully getting rid of the last of the water) and see what I can see.

 

[Zebrafive]

Did the seller replace the OC plug P/N AW17949? Seeing it might show how CC plug should be made.
At this point I'd probably buy a replacement CC valve.

 

[Jimmy_G]

Did the seller replace the OC plug P/N AW17949? Seeing it might show how CC plug should be made.
At this point I'd probably buy a replacement CC valve.

The seller didn't do much other than get the tractor running before I bought it. They are a re-seller.

I'm going to look for the valve and see where that takes me.