The reason that propane /butane refrigerant is much more dangerous than engine fuel system fires, is that the flamible refrigerant has direct access to the inside of the cab through the AC vents. A leaking / ruptured evaporator will release hot liquid propane inside the cab that will expand aprox 200 times into highly explosive / flamible vapor that quickly fills the cab. Sparks from the brush type AC blower motor is a perfect ignition source to light off the propane vapor.
Why risk that kind of danger when R134a is legal, cheap, avalible anywhere and it works.
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Today's Featured Article - Harvestin Hay: The Early Years (Part 2) - by Pat Browning. The summer of 1950 was the start of a new era in farming for our family. I was thirteen, and Kathy (my oldest sister) was seven. At this age, I believed tractor farming was the only way, hot stuff -- and given a chance I probably would have used the tractor, Dad's first, a 1936 Model "A" John Deere, to go bring in the cows! And I think Dad was ready for some automation too. And so it was that we acquired a good, used J. I. Case, wire tie hay baler. In addition to a person to drive th
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