Need some advice, I have a M4050DT and I have lost hydraulics. I was using the tractor to brush hog some long grass and everything was good. Parked the tractor and lowered the bucket and all was good hydraulics worked great. Started the tractor a few days later and absolutely no hydraulics. Cant raise the bucket or 3pt. Seems like I have power steering but nothing else. I cleaned the hyd filter and it was relatively clean. Drained the hydraulic fluid and added fresh and checked the suction line from lower trans case to filter and it was clean. Any suggestions on what to check? Could a valve be passing? I cant see how the pump would just quit when it was working good before shutting tractor off. I am at a loss here. Thanks for any ideas you might have. Tom