The original loader valve has 7 hoses - one being a "power-beyond" hose that goes back to the hydraulic block to power the 3-pt hitch. Some loader valves don't have a PB port. Some have it but need a special fitting put in to enable it. If there's a "PB" port on your new valve, run a hose from it to the unused port on your hydraulic block and the 3-pt will come to life. Take care, Dick B