If you want a disk.... you need to find one of these:
Pic "stolen" from member red56turbo (thanks Josh

).
3ptbd.jpg
Or build one like this:
disk1.jpgdisk2.jpg
Problem is, your tractor is only 15HP, and a hydro....... so, your limited. Really need either a super, or a big gear drive. Yes, the hydro will probably pull it, but your not going to be cutting ground with it. You can with the second one, I saw a vid of him disking sod with it. But he had a bigger tractor, and weights, and lugs.....