I have an M 9540 Kabota bought it secondhand loader off of a fairly new tractor installed it on my tractor and having problems with the Curl. Plumbed it according to the diagram in the parts book and mechanics service manual The problem is when I go to curl up in curls fine when I curl down it still curls up but slowly I thought perhaps the hoses were switched so when I switched them it works fine except in reverse order the joystick and the self leveler is self-leveling in reverse