Converting Power Beyond to single electro hydraulic valve

[pclausen]

So I got a JD 5085M with triple rear valves, but I really need 4 (3 way blade + hydraulic top link).

Since my tractor has a Power Beyond kit that I never use, I was thinking I can pull it off, and plumb in a eletro-hydraulic valve for a 4th rear.

Here's a pic from the JD parts catalog showing the PB kit:

And here's a shot from the rear of the tractor showing the same thing:

So I was thinking I need this open center valve:

12 VDC 10 GPM OC DA SOLENOID VALVE

And this block:

1 STATION DO3 SUBPLATE OPEN CENTER

I'd then need the proper adapters to connect the open center ports to where the PB kit was connected, and then get one more quick disconnect fitting (in addition to the one the PB kit came with) and angle adapters for the working ports on the DO3 block.

I would then get a toggle switch for the cab to control the solenoids as well as re-wire one of the rear fender toggle switches as well. I'd then use this 4th port to control the hydraulic top link from in the cab (when operating the blade) of from behind the tractor when connecting/disconnecting implements. This way I would no longer have to jump in and out of the cab to adjust the top link when changing implements.

Does that sound like it would work?

 

[MtnViewRanch]

NO NO NO.:no: Do not get that valve and sub plate. :thumbdown:You WILL cook your hydraulic system. You have an implement pump that is putting out over 18GPM. You really need a system that handles 20GPM.

 

[pclausen]

Thanks Brian. Glad I asked!

Ok, so that DO3 sub plate has SAE 6 ports. I see that there is also a DO5 sub plate that has SAE 8 ports. That should be able to flow up to 30GPM.

AD05SPS8S DO5 SUBPLATE SAE 8 PORTS

The challenge now is to find a OC DA 12V solenoid valve to go with it. The only one SC has operated at 115 VAC.

 

[pclausen]

Ok, so it looks like I need something like this. Open center is what I want, right? (other choices are closed, float and tandem)

Northman Fluid Power Hydraulic Directional Control Valve – 26.4 GPM, 4500 PSI, 3-Position, Double Solenoid, Open Center Spool, 12 Volt DC Solenoids, Model# SWH-G03-C3-D12-10 | Power Solenoid| Northern Tool + Equipment

And this sub plate:

Northman Fluid Power Single-Station Subplate — NFPA D05 Pattern, 1/2in. NPT Side Ports, Model# M03-04-S-2 | Control Valve Accessories| Northern Tool + Equipment

 

[MtnViewRanch]

I would not use these. You should have something with a #10 port size. Working ports are one thing, but when you have a continuous flow, you want zero restriction. Your through ports and passages need to be 5/8" IMO. You would need to only have 15 gpm to be able to have the # 8 size work sufficiently. You really need bigger.

Yes you are working with an open center system.

 

[oldnslo]

Unless you have PO Checks on your top link you do not want that valve. It is an open center which connects all ports to tank in the center condition. What you would want is a Tandem center valve where P & T are common and the A & B work ports are blocked.

Agree with Brian D05 ports are too small for continuos flow.

 

[pclausen]

Ok thanks. Tandem center valve it is then.

They do make a D05 with 3/4" ports:

Northman Fluid Power Single-Station Subplate — NFPA D05 Pattern, 3/4in. NPT Side Ports, Model# M03-06-S-2 | Control Valve Accessories| Northern Tool + Equipment

But I guess the oil still has to flow through the small holes that the valve body bolts up to? Is there such a thing as a "D07" sub plate?

 

[MtnViewRanch]

Go here, talk to Jeff. This is my supplier and he will get you taken care of.

 

[pclausen]

Thanks Brian!