the control for my front bucket does not operate my bucket anymore. the hydraulic controler has problems going down and curling down. the controler is a steel box with two pistons,and 6 hoses going to it. one of the bottom covers under the pistons leaks when I try to put the bucket down or curl down. Seems like it is building up pressure and the bucket also jerks when it is going down. when I turn the tractor off I still cannot push the one piston down with the control arm, unless I force it and then the cover under one of the piston leaks and the control arms moves freely. any ideas what is the matter with the controler or hydraulics?