Will they just order you a part walking in off the street. I think that is highly unlikely.
Fixing would include getting parts and I would think in the case of a repair they'd call another dealer for the parts.
I'll try this again, no matter how loyal you are to your dealer, How great a guy you think he is, when they decide to switch brands, you get the shaft. You don't get parts, and you don't get warranty service any more. The two most important things, after the sale. And, you
should be considering, when choosing a dealer. Two things that very often swayed you to them, because they were close to home. Often, when you have a brake down, you would prefer to have your parts right now. Not, the next day, or next week.
It's business, and the loyalty to you didn't matter.
Sure, they want to sell you another tractor. So, of course, they will still smile and be "real glad" to see you.
Sure, if you can't do your own repairs, and you want out of warranty service, that's what they do. Of course, they aren't going to tell you no. Your money spends just as good.
Neither of those are my point.