New to site. I have a MF481 with a 1071 loader. Something seems wrong with the hydrolics for the loader. When I go to put it up it is very jerky and hesitates. I bought the tractor used and not sure if this is just the way it is or should it be going up smoothly. Have brought it to the dealer and they did replace a control valve. Still having intermitant problems with it. Any insight or suggestions would be greatly appreciated. Thanks.