Third function valve verses a diverter valve.

J_J · Dec 1, 2010

A third function valve will allow one to raise/lower, dump/curl, and open/close your bucket all at the same time. It gets its hyd flow from the PB port of the FEL valve. It could be electric or manual, usually located close to the operator.

http://www.wrlonginc.com/Hyd DO3B Flow Diagram.pdf

A diverter valve does just that, when activated, it diverts the fluid from the curl circuit to operate the grapple. Releasing the switch returns the flow to the curl function. This can be done with a single solenoid or a dual solenoid.
When practical, the valve is located in the most inconspicuous and protected area.

Single solenoid:

https://www.surpluscenter.com/item.asp?item=9-7852&catname=hydraulic

Select Instructions.

Dual solenoid.

https://www.surpluscenter.com/item.asp?item=9-5117-A&catname=hydraulic

https://www.surpluscenter.com/Instruct/I9-5117-A.pdf

ComeBye · Dec 8, 2010

Good description. I'm leaning toward a 3rd function for a root grapple, but it will cost $1400 (out the door) for the Kubota dealer to do it. Assuming I'm somewhere in the middle of the bell curve in terms of mechanical competence, and that I have access to all of the tools I would need, what do you think is the probability that I could install this myself?

You seem to know this stuff, I'd appreciate your thoughts.

Nate

rjkobbeman · Dec 8, 2010

I installed my 3rd function valve myself. It was a piece of cake. I would think as long as there is a 3rd function valve designed for your tractor and no "creativity" is required, the installation is pretty straight forward.

I am quite mechanically competent, however this is my first tractor. It was pretty easy to do.

J_J · Dec 9, 2010

ComeBye said:
Good description. I'm leaning toward a 3rd function for a root grapple, but it will cost $1400 (out the door) for the Kubota dealer to do it. Assuming I'm somewhere in the middle of the bell curve in terms of mechanical competence, and that I have access to all of the tools I would need, what do you think is the probability that I could install this myself?

You seem to know this stuff, I'd appreciate your thoughts.

Nate

There is no reason you you could not install a valve if you follow the rules. All valves in series, correct fittings and hoses. You need to choose manual or electric valve. You could scrounge the parts from wherever.