I've always wanted to see those spin out wheels in action. Our JD530 rears use the other way JD used to adjust width - the rear wheels have a pinion built into the center of the cast hub, and there is are matching rack machined onto the extra wide axles. The wide front also has an adjustable width front axle but it works differently, with tubes that slide in a cast center piece..
Some day we will have to set all the wheels out to max just to see what it looks like.
I think 5030 may be technically correct. I think I did see those spin out wheels called "power adjust" in my 530 owners manual...I'll have to take a look.
We bought the 530 used from a corn farmer 30 or 40 years ago. He ordered it new with a number of options.. Power steering, extra remotes, a sprung seat with dampers, & 12 volt electrics. I then put a FEL on it. It's been a worker for us, but not so much since the Kubota came to live here.
rScotty