I have a Kubota B8200 and the hydraulics started failing a couple weeks ago. They first got very slow and jerkey and then failed completely. I checked the fluid and it was a little milky so I changed it and cleaned the filter. No luck so I assumed the pump had failed - replaced the pump and no go - so I replaced the Pressure relief valve and no go. I am kind of at a loss at this point. I have a blade on the 3pt and a loader on the front and neither of them will operate. If I start the tractor and try to activate any of the hydraulics, it does nothing except occasionally (about every 15 seconds or so) I hear a grinding/vibrating sound that seems to be coming from the hydraulic block. The buket or 3pt will raise about a 1/4" when it makes the sound when the sound quits, the hydraulics doesn't move. Another 15 to 20 seconds and it will do it again. Could I have a failing control valve?
Stumped!!!
Stumped!!!