They are good tractors BUT!!!! The hydraulic pump is on the front. Check to see if it has been replaced or worked on. It was a bad idea on JD's part to mount it the way they did, and they tear them selves up. Once that starts to happen it will continue to happen.
The tractor settles down or sinks, I'm not sure how to put that. The hydraulic pump is the biggest problem with the older JD backhoes.