Interesting.
....Got a pic of that tracked one?
Deere had this out for quite some time. Well actually there are no springs, it's electronic hydraulics, it really neat to use, as you put a load on the tractor the front end rises, but it senses the rise and lowers the front back to normal. If you let the tractor sit in the barn over winter months it completely bleeds off and frame is just about on the ground.
mikehaugen said:couldn't this be done much more simply with just 2 pivoting axles, one above the other and 2 "ball joints" on each of the steering knuckles? It wouldn't do the load leveling that you are talking about, but would accomplish what is seen in the pics.