you can buy the stuff if you want to....
yea the license "key" changes.
this stuff is exactly why service costs as much as it does!! t'wasn't uncommon for the techs to have to buy some of it since the dealer didn't want to, or couldn't afford to. I had to buy a lot of stuff on my own and when I left I took it home with me. software/hardware I did buy some of that but left it there. I also bought a few ECU's that I used for testing purposes. I want to say it was about $2700 worth total. I left a lot of that there too and could use at least one of the ecu's right now to test a customer's machine with.
SOMETIMES you can force a regen. If soot level is 4.5+ it won't, removal and cleaning necessary, and after that is done there are several changes that have to be done in the ecu
occasionally the dealer can bring laptop to job site and have a look-see. Prepare to pay them a service call fee, and possibly transportation fee if they have to haul it in. In those cases you might ask about the costs before you tell them to come out.
it's not just kubota either. cat deere komatsu liebherr, Kawasaki, all similar deal.
nothing is inexpensive when it comes to construction equipment, and we gotta ask ourselves, if it costs XXX much to fix our equipment, how are we gonna pay for it? Charge more for the services we offer....which means the consumer pays more. I could get political with it but I think I'll keep it to myself. For once!