I have a 3588 and my hydrolics quit working I reconnected the hoses to other female plug in fittings nothing.I took the pump off had it rebuilt. they said the piston was sticking. when reinstalling I changed all the hydrolic fluid.filters. started it and it pumped up. The tractor moves and it turns perfectly,but won't lift. I took the ends off two lines tryed moving the levers and only a little fluid comes out. I need help any suggestions ?? Thank You Bob