Finally got it apart after heating it and using a 6 foot extension to my breaker bar. When it came loose it snapped the socket off the end but it was really loose. My question deals with a what appears to be a rubber gasket partially blocking the center hole back to the hydraulics. It was sitting on the side of the port and somewhat elongated. It was not round. When I took the filter out it was sitting there spoon shaped sticking out. I didn't find a rubber gasket in the new Agco filter and didn't think it should be there. Was there such a gasket? The hydaulics work faster and are more responsive since I removed the rubber gasket. I suspect it was partially blocking the port.