I just pickup a 646 loader and I'm going to put the three point hitch on. It already has the rear PTO. What I want to do is eliminate the lift cylinder underneath since it will not have a mower deck on it. I want to run that circuit to the 3ph cylinder and also to the front down the loader arms and add quick connect fittings to be able to run a grapple. I figure I will have to put a lockout valve on the 3ph cylinder so it won't cycle when I'm using the grapple. My knowledge of hydraulics is just general but it seems like it should work. Am I missing something before I tear into this? Has this been done before?