190XT on propane, AC's were good basic tractors. They were manufactured to closer tolerances than most tractors at the time, and it shows in longevity.
This early series 190 was primarily used for commercial hay baling before I bought it. I use it for general work at a tree farm, mostly food plots and cleanup.
Over 20 years, the only repair was a 3/8x1 bolt in the transmission, resulted in breaking the tractor and tearing down the transmission.