More 4000 Hydraulics: Adding the third SCV

3619 Views 9 Replies 4 Participants Last post by hanson1999, Apr 12, 2012

CharleyFarmall

Discussion Starter · Apr 10, 2012

Assuming the guy comes to pay for my 3320, I am about to order a 4520 Cab. I do not like the location of the EH SCV or the $911 cost so I want to plumb my own, as well as an additional valve or two. It seems that it ought to be easy enough to plumb the valves into the circuit where the factory 3rd valve goes but I can't tell which ports to plug into nor what parts I might need from the deere schematics.

Even if I just use the power beyond option Deere wants $300 and I don't really want the hard lines or the connector. I would only need the PB plug ( assuming it works the same as the 2x20 series valve).

My intended use is EH SCV for the grapple, mounting the valve under the tractor closer to the loader, then adding two regular valves for the back. I can fab., weld, etc, i'm just not familiar with the parts on this machine.

Thanks!

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CharleyFarmall

Discussion Starter · #2 · Apr 10, 2012 (Edited)

Is there a reason why no one has plumbed into the 3rd scv circuit that comes off the loader valve and then placed several open center valves in line?
I was looking at the 4th/5th circuit and it looks like the power beyond circuit is plumbed with a third line. I guess I need an explanation of why that circuit has three lines in it...

Thanks!

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Brian

· #3 · Apr 10, 2012

The 4x20 series changed slightly with regards to hydraulics in 2011. I have a 2010 model and it would be simple on my machine and I could get you pictures, but I am unsure of the exact changes. I also have the service manual, but again, not sure what is the same as they say the kits are not compatible backwards.

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Kennyd

· #4 · Apr 10, 2012

Charley, I think the biggest problem is real estate. Is is very easy to plumb a bank of two or three valves and hang it on the ROPS, but on the cab tractors that is all but impossible to do. No one wants to bring oil lines into the cab, and there is so very little room outside to mount a valve and use linkages or cables to operate it.

So, that leaves the EH valves-like them or not it is truly the best option for a cabbed tractor. I have not studied JDParts yet to really answer your question (short on time now) but make sure you order the service manual when you order the tractor.

Be happy to help more later...

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CharleyFarmall

Discussion Starter · #5 · Apr 10, 2012

I have looked the tractor over pretty well and I think I can fit the valves. I may separate them with the one for the grapple in a different spot. I still think I can fit a standard pair and use an EH SCV for the grapple. Even if I used all EH Momma Deere wants over $3,000 for the three EH SCV's! Plumbing my own lets me add flow control too.

I just got a call, they are coming to get the 3320 tomorrow so my order is going in tomorrow for a 4520....

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Kennyd

· #6 · Apr 10, 2012

CharleyFarmall said:
I have looked the tractor over pretty well and I think I can fit the valves. I may separate them with the one for the grapple in a different spot. I still think I can fit a standard pair and use an EH SCV for the grapple. Even if I used all EH Momma Deere wants over $3,000 for the three EH SCV's! Plumbing my own lets me add flow control too.

I just got a call, they are coming to get the 3320 tomorrow so my order is going in tomorrow for a 4520....

Wiil you use cable's to operate them? Where will the levers go? As you get closer we can iron out the hookup details.

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CharleyFarmall

Discussion Starter · #7 · Apr 11, 2012 (Edited)

Kennyd said:
Wiil you use cable's to operate them? Where will the levers go? As you get closer we can iron out the hookup details.

Kenny,

Yes I would use cables to operate them. The quadrant in the cab has empty slots in it and I would use those. I can cut, weld, bend etc so fabricating something is not that big a deal. I know that someone on this forum recently put levers from an early 3x20 into a late model cab the same way.

Charley

PS - I had the price wrong, it's $2,200 to add valves 3/4/5.

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hanson1999

· #8 · Apr 11, 2012

CharleyFarmall said:
Is there a reason why no one has plumbed into the 3rd scv circuit that comes off the loader valve and then placed several open center valves in line?
I was looking at the 4th/5th circuit and it looks like the power beyond circuit is plumbed with a third line. I guess I need an explanation of why that circuit has three lines in it...

Thanks!

that is how i did it. i put my 4th valve in line coming right out of the loader valves. then it feeds the Eh 3rd hydraulic.

the third line is a tank return. i used that option on the valve i added as well to protect the system. I plumbed it into the right side of the top link for three point. there is a plug there that is where they plumb this low pressure return for a backhoe as well.

The fittings at the loader valve are standard flat face o ring. the plug at the top link is a metric ORB or british pipe i believe its called??

Take a look at my 3720 cab and you can see how i mounted the valve inside the right rear tire. and used the factory lever and cable to run it.

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CharleyFarmall

Discussion Starter · #9 · Apr 11, 2012

Hanson,

Your tractor is the one i had in mind when I was talking about adding cable levers to control a conventional SCV on a post 2010 tractor. I am not sure I understand how you plumbed the extra line in the valve. Do you have two returns off the valve now?

I like the location of the valve and I am planning on doing the same. I just placed my order for a 4520 Cab and decided to buy the 3rd EH SCV rather than do it myself because this way I can use the tractor from day one an d I have a lot to do and need the extra valve immediately for some of my equipment.

Charley

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hanson1999

· #10 · Apr 12, 2012

CharleyFarmall said:
Hanson,

Your tractor is the one i had in mind when I was talking about adding cable levers to control a conventional SCV on a post 2010 tractor. I am not sure I understand how you plumbed the extra line in the valve. Do you have two returns off the valve now?

I like the location of the valve and I am planning on doing the same. I just placed my order for a 4520 Cab and decided to buy the 3rd EH SCV rather than do it myself because this way I can use the tractor from day one an d I have a lot to do and need the extra valve immediately for some of my equipment.

Charley

I used an open center valve with power beyond. the inlet comes from the loader valve, the power beyond goes to the EH 3rd scv, and the tank port goes to the top of the transmission housing by the 3 point top link as i explained.

I later saw some ports at the bottom of the transmission i could probably have used for the tank port. but it worked fine the way i did it.

Not super familiar with the 4x20 series, i have 4 inch wheel spacers otherwise i don't think the valve would fit where i put it. it would maybe work but be darn tight. depending on your tire style too of course.

you will like the 3rd EH scv for a grapple or similar use. i use mine for that and snowblower chute rotator. works fine for that.

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