I have a 2270 swather that the header will not raise and lower. The book said to check port D on the controller to make sure it has 2000 psi pressure. It has none. Does the charge pump provide the pressure? I have changed the filter. If anyone has any suggestions, it would be greatly appreciated. Also, under the seat there are two levers that are bolted together. The book says they are motor controls. What exactly do they do? They go down to the top of the hydro motors. Thanks,