Do you know what engine is in the dozer? Chances are that a rebuild kit is not available, you’ll need to buy a reman turbo. In that case, it’s a fairly simple swap.
What is it doing that you think it needs a turbo rebuild?
I’d say it needs a rebuild lol. The engine is likely an International DT239. A complete reman t04 turbo is about $700 give or take a bit depending on the specific model plus shipping and core. Get all the info off the tag on the turbo and I’ll be able to get a closer price. You’ll also need a couple gaskets, maybe some hoses and clamps. I might be able to do it depending on when it needs to get done.
I’m not finding a rebuild kit, only reman turbos. If he has it off already, tell him to just buy a reman turbo and be done with it. It’ll probably be cheaper anyway. If he took the old one off, I’m sure he can handle putting the new one on.
Call H&R Construction right here in Buffalo. I used to work for them and they might have what you are looking for they specialize in alot of the hard to find stuff.