Hello all, I'm trying to fix a problem with my tractor that just happened today on my 1958 841 diesel. It has a Ford loader on it and all the sudden the only way you can get the bucket to lift is you have to have it full throttle and the bucket will lift real slow other than that it will tilt back and worth with no problem and it has down pressure and will lift the tractor off the ground. The oil is filled all the way to the top. I think something like a o ring or whatever they use in the valve went bad. Does anyone know if they sell a rebuild kit for the valve? I will try to include a few pictures of the valve as I cannot find a name on it. Thanks in advance.