3rd Function Valve for Grapple on JD5420

[gary1978]

I went to my local JD dealer and asked what I needed to add a 3rd function electric over hydaulic valve to my JD 541 loader on my JD 5420 tractor so I can operate a grapple from the joy stick. They couldn't find anything in their "catalogs" that they said would work. They wanted me to add an additional rear remote and operate the grapple with that. I explained how I only had one arm on the right side of my body and it seemed a poor solution, but they said there was no other way to do it. I have read that the J.W. Long kit is the best way to do this, and I don't want to just install a diverter.
Does anyone know if there is a "factory" John Deere kit to add a 3rd function valve to the tractor/loader combo or should I just buy the J.W. Long kit?

 

[kennyd]

Does anyone know if there is a "factory" John Deere kit to add a 3rd function valve to the tractor/loader combo or should I just buy the J.W. Long kit?

Welcome to TBN...

There is no factory option. Get the WR Long kit or make it up yourself.

 

[J_J]

What could be anything more simple than this. Add a switch and your curl circuit becomes a grapple circuit..

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

https://www.surpluscenter.com/Instruct/I9-7852.pdf

 

[Cidertom]

If you have a power beyond, you could try what I did in
http://www.tractorbynet.com/forums/...g/206320-6th-selective-control-valve-4-a.html

The WR Long kit is a simple solution that works.

 

[gary1978]

I'm going to go with the W.R. Long kit. I've designed and built my own self-starting phase converter and a completed a few other interesting electrical projects, but I have no idea what a "snubber diode" is, so I guess I need to limit myself to more user-friendly installation kits.

I think I will have to connect the W.R. Long grapple (or third function) valve to the "Power Beyond" line to/from my current mid-mount loader valve. Is there any easy way to determine which line this is? There is a port on my loader valve marked with a "P", and it's on the top of the valve body. Is this the line I need to splice a "T" fitting to provide the power to the grapple valve, or is the gapple valve supposed to be plumbed in series with the loader valve? Any idea how to determine which of the two lines coming out of the bottom of the current mid-mount loader valve goes to the "tank" and can I just "T" into it as well from the grapple valve? maybe the W.R. Long kit will come with instructions. Nothing ever seems to come with instructions any more.

 

[J_J]

P is your pressure port, T is your tank port. Grapple valve goes in series.

 

[jcliburn]

Here's my experience installing a W.R. Long kit on a Kubota. It's long-winded, but it may be helpful to get an overview of the project.

http://www.tractorbynet.com/forums/kubota-owning-operating/192572-w-r-long-kit-plus.html

 

[k0ua]

but I have no idea what a "snubber diode" is, so I guess I need to limit myself to more user-friendly installation kits.


I will take a stab at it: I haven't heard it called that, before but I think they mean a Reverse EMF protection diode. When you have a solenoid or relay coil and you energize it with DC, there is a magnetic field that builds up in the coil. When you remove the energizing voltage, the field collapses, and a reverse polarity Electro-Motive Force flows from the coil. If you place a diode in the proper direction such that it conducts from this reverse polarity, and shorts it out, I guess you could call this "snubbing" the voltage. The purpose of a protection diode such as this is to protect other circuits which share the same energizing voltage bus from this high reverse polarity "spike or pulse". A pretty simple thing to add across the windings of a a coil to afford a lot of protection. There you have my best guess.

James K0UA

 

[Cidertom]

K0UA has it correct. The term snubber diode is used some places, not all. Wiki has a more in depth discription if you care. The big issue here is the contacts on the control will get pitted fairly fast as the voltage is fairly high so the arc will be "long".

One thing I like about my handle install is the hand can rest comfortably for long periods.

Have fun

 

[AGGIE00]

Try LVB26101. I just installed it on my 5083e. Works great with my frontier grapple. It may be possible to retro it to your tractor.