This is a hydraulic pilot pattern changer for backhoes and excavators. It changes the joy stick pattern from John Deere to SAE with the easy flip of the lever. It is 100% mechanical/not electric. Data sheet available upon request. Also, we are hydraulic systems experts and can answer questions about installation. This valve will work on John Deere, Cateripillar, JCB or any excavator or backhoe with hydraulic pilot controls.