I have a John Deere 5105 tractor I bought new three years ago. The two arms that go up and down on the 3-point hitch are stuck in the up position. I found the knob that adjusts the drop rate and fidled with that. I even took the arms off, backed up to a tree, chained the lifters to the tree and pretty much destroyed the tree. All of the other hydraulic stuff seems to be working still. I called the dealership and talked to the head mechanic. He's never heard of this before. He looked though all of his books and came up with nothing. I'm scheduled to now take it in on Monday and have them open it up to the tune of a few hundred bucks. A few hundred bucks would be mighty painful just now, but I gotta mow knapweed or it's gonna take over! Any ideas?