Follow along with what Tim's telling you. Get a valve like this;
http://www.ebay.com/itm/JOhn-Deere-3...YAAOSwyDxXgwj3
You will also need to make up a kit like this;
http://www.xtrememotorworks.com/Part.../CC-70-001.htm
But... If you're not familiar with the different hydraulic fittings you may be spending a bit of time (and money) swapping out different fittings to get it all to hook up right. You will also still need to fabricate control levers for the valve. It's not really that hard, just plumbing.
Good luck.
