I rebuilt the aux control valve on Farmall 656,(gas, gear drive). Went to dealer and got all the correct orings and a new unlatching piston. Put it all together as per the shop manual and now It wont raise a hay rake. The control lever molves forward or reverse but does nothing. Im pretty sure its not airlocked cause i loosened the plug screw on the back of the sleeve and had fliud flowing out of there. What could I have messed up? Any help appreciated. It says that tunit must unlatch at not less then 1000 and not more then 1250. What are we dealing with here?
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