I have a Kubota B20 I was using a box blade on recently. After I finished with it, I loaded it one evening, kinda chilly that night as I recall, and hauled it home. It sat on my trailer for a couple of weeks before I could unload it, and when I did, the three point wouldn't lift. The loader works ok, which, as I understand it, runs off the pump in front of the engine, as does the steering. I have taken the line from the pump off and run the engine, and it seems to be putting out some flow, albeit perhaps not enough. I took the pump off the tractor and the gears look good, and the drive. I don't have a service manual, and wonder if anyone knows if there's a relief valve that could be stuck or something in the control. I find it hard to imagine the thing just quitting totally after it was working so well before. Thanks for any help or insight.