My hoe will not swing left and i have check both swing check valves. I removed the swing cylinder pin that attaches to the swing frame and I can watch the cylinder operate in both directions. I tried to manually push the hoe left and right, but can't. I even tried to use a large tree as a fulcrum and still cant get it to move. Its like the swing are bushings are froze up. I did notice the bottom swing bushing locking bolt sheared off . i had to drill it out. My question is, should I be able to manually swing the how left or right with the cylinder attached? Help!!!