Made the round trip to Pawnee OK with no issues. Truck pulled good on the hills. Here is a picture of the tractor powering the Baker fan. The fan was used as a diagnostic tool back in the day. It would put a load on the Steam Tractor or in this case Diesel Tractor and allow you to observe and adjust engine settings for proper performance.
https://www.youtube.com/watch?v=YGYmNnkPHEg