I am having a problem with my 3 point lift. When I am digging a post hole, and the 3 point is lowered all the way down, I lose hydraulics to the entire tractor even the front end loader won't work). I thought maybe I was low on fluid (I checked it and it's ok) I thought maybe the pump was bad so I pulled it, had it checked and it's ok. While I had the pump off, I replaced fluid, filters and even removed the cover and flushed out the reservoir. I reinstalled the pump, bled it out and it worked good, until I lowered the 3 point all the way down again. Anyone ever had this problem?