I have a problem with my 335. When I get about 1/2 of hay in the chamber rolling it wants to quit turning the belts. I only have one set of remotes coming off of the baler. It has new cylinders on each side of the tailgate. I have to pull a rope to switch between the hydraulic tie arm and to open the rear gate. If I hold on the leaver to apply pressure to the gate it will keep rolling. I know its nothing wrong with tractor it has to be the hydraulics on the baler. Something is leaking off causing pressure of the belts to slack off. Its not air in the system. I have the tension valve removed and the releif valves look ok which doesn't mean they are good. I don't think john deere makes this tension valve anymore. Could I replace tension valve with another one off of another John deere baler. Just the relief valves are 250 dollars a piece. I would be better off replacing the whole block if I could come up with something. Any ideas?