The smallest tractors Deere sells that can take category 2 implements are the 4M Heavy Duty. All of their other 1-4 series tractors are category 1. The 5 series tractors are category 2.@Fletcherwitz What tractor are we discussing here? most JD 1-3 series are cat 1. The X7xx when equipped are cat 0. I don't know when the cat 1 to cat 2 change happens but I think it's an option at the 4 series.