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Message: <blockquote data-quote="Mike10" data-source="post: 65903" data-attributes="member: 5461">I would first remove the cap from the stand pipe where the screen is and see if the oil is up in the pipe.  It is possible something might be blocking the hole at the bottom of the standpipe.If you had a flow meter I would connect it to the pressure side of the pump and see if you indeed have flow from the pump and if the pump can build pressure.  If you are careful you can do the same thing by connecting a hose to the pressure side of the pump with a pressure gauge tee'd into the hose and a hyd gate valve.  You can run the other end of the hose into the dipstick tube.  If you have flow then slowly close the gate valve while watching the pressure gauge being careful not to totally close the valve or build pressure above 2500 PSI.  If you can build at least 1000 PSI then you should have some action from the controls when reconnected.  If you have flow until the gate valve is closing then you have a pump problem.    Try not to run the engine any more than necessary since the hydros are not being supplied oil.</blockquote>