The original SF is made to use in gas and diesel fuels, or in the crankcase oil or either too.It's probably doing the job intended and burning out the crap in the engine that shouldn't be there. But isn't there a different formula (can) for Diesel engines?
Big mistake. Use more and run the tractor hard till it clears up. The SF is doing it's job.....google "Decarb", read the process and then think about your situation and your current decision.I had a can of that and put a little in the tank now it smokes me out I have to start it with the windows and door open! That will be the last time I use that in the tractor.