It seems completely free at the top 30 degrees of travel and seems to rest mechanically at the working top end of travel. Have tried every valve configuration possible. These top arms are free. You can raise them and drop them against a hard stop that is near the top end of travel. Messed with the flow control valve under the seat with no luck. Have read about the piston coming out of the cylinder on the upper arms. Is that possible? Isn't that a major design flaw to allow that condition? Any advice is appreciated. Bought this tractor used with low hours and in great condition. Thanks