I got a little(or not so little) problem. Every time when raising the loader,the Loader drops 8 0r 10" after letting go of the joystick,but holds steady after that. Position of the loader don't matter. I thought maybe the cyl seals where shot,but after taking the cylinders apart the seals look still perfect and the pistons are still tight to the rams. So i guess it must be the control valve that's having issues,but where do i look? Any one of you folks that had that problem and know what it is? Thanks