I thought my ford 2000 front end loader cylinders needed to be resealed. Bucket would not move and lift arms would hardly go up. Found a filter in the bottom of the left side hydraulic fluid tank. Unscrewed the four bolts that hold the plate with the big fluid hose that goes to the pump. The filter is in there. It has a pre-filter screen on top. Mine was totally clogged. It looked like fiber pieces of deteriorated hydraulic hose had formed a mat that was restricting oil flow to the pump at the front of engine. I hope this helps someone who is having the same problem as I had.