My Grand L 5740 is a Cat 2 as was the one below it. SAE standard is 50 HP and up (can't remember the 2 to 3 HP switch) Cat 2. Kubota follows the standard although some others (Deere in particular) don't. The Cat 2 Kubotas are actually Cat 1-2 in that the arms will swing in to Cat 1 position and you can get the bushings for Cat 1 to Cat 2 in any farm store. Our JD 6230 for example will not allow the draft arms swing into the Cat 1 position. Our 7720 Deere, however, is Cat 3 but the arms can move to Cat 2 and we use Cat 2 implements using bushings.