The hydraulics on my 3000 are not working veryt well. The front end loader and 3 point work verrrrry slowly, or not at all. If I leave it run for a while it works a little. When I took the fill plug off and looked with it running the oil was "rolling" so I assume the pump is working. But the oil is milky looking. I had to leave the tractor outside this summer. Could water have gotten into the system causing the milky look and the malfunctioning? This is my hay tractor I use about every day so any suggestions will be appreciated.