fordson super 3ph

just wandering if anyone has any ideas why my lift arms on 3 pt went up and will not now go down? first time i got it running this is what happened.
 
(quoted from post at 10:17:26 02/20/13) Un-loader valve on ram likely inoperative. Stuck.
Wayne
ou may KNOW better than I do, but it seems to me that the "dump" circuit is independent of the unloader valve, so proper mechanical positioning of control valve should open the dump path & lower the arms. On the long shot that the pump output can flow more than the dump path, then 'stuck in lift position unloader' might keep arms up, but even then they should drop at engine/pump stop.
 
well it seems even with the tractor shut off and me standing on the arms they will not go down, tried the control arms in various positions? there is some kind of a unit on top of the housing with a control valve and hydraulic hoses with couplers from it, was wandering if it is affecting the lift part?
 
(quoted from post at 13:54:41 02/21/13) well it seems even with the tractor shut off and me standing on the arms they will not go down, tried the control arms in various positions? there is some kind of a unit on top of the housing with a control valve and hydraulic hoses with couplers from it, was wandering if it is affecting the lift part?
ery well could be.......operate that valve and see it all is then well with your lift.
 

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