You can order the Land Pride 3rd Function Valve Kit #380-166A and download the PDF file to install it. You can order the kit from your Kubota dealer. This kit number is on the one for the MX series tractors, but most likely your dealer can get one for your series tractor. I imagine the kit is basically the same one, or you might be able to modify this one to suit your needs. Also Everything attachments has some available for Kubotas as does W. R. Long. I prefer the Land Pride one as it is a slick and easy install. They cost $650-$700.