I tried adding yours to my garage and got the same message. If a dealer can't tell you, I think you're SOL.
North Idaho Wolfman identified the weakness in the Kubota website database. If you don't enter the correct description, like 2WD, it fails to find my 2WD L2250. I'm a computer engineer and that's a VERY poorly designed database. Properly designed, it should give me all possibilities and, seeing how I included the unique identifier, the serial #, it shouldn't need to know the description as there is only 1 L2250 in the world with that serial #.
So after all this work and getting help figuring it out, the only data about my unit is a black ink sketch of the tractor. All the text data (not pictures) on every tractor Kubota ever built can be stored on a 10 year old mobile phone. Not maintaining older data is ridiculous.