I have recently removed the loader from our M4700 to put it on a Kubota M6800. Now the 3 pint hitch does not work on the M4700. I need to turn the control screw on the M4700 on the auxiliary valve holder so that the hydraulic fluid will flow to the 3 pint hitch and the rear remote now that the loader is removed. From a review of the manual this only requires the screw to turn 1/4 of a turn clockwise. The problem is that I cannot get it to turn. Does anyone have any suggestions? I am wondering if it might help to remove the plug from the pump outlet and the power beyond outlet to relieve any pressure on the valve. Any thoughts or suggestions would be appreciated.