Last night while plowing snow the curl/dump function on my JD 410 loader stopped working when I was banging the bucket against the dump stop to clear snow from the bucket. It seems to be trying to work when I activate either the curl or dump function the engine rpm decreases slightly like the fluid is being restricted some how. I checked that the function of the QD when disconnected, to insure the flow of fluid when the button on the end of the QD is depressed. The bucket can be moved thru its range of motion by hand with no resistance. I have switched the hoses with no change in operation of the bucket. This only effects the bucket as I can still raise and lower the lift arms.