The Missing Link in Tractor Development

Tracking the elusive auto tractor.

This image further defines the marvelous set of gears that made the Auto Tractor what it was. The fact that these huge gears did their work without lubrication is amazing. As cumbersome as these gears appear, they were the forerunner of gears on today’s tractors. These appear to be planetary gears: If they were not, the hub gears on the car wheels would have run the tractor in reverse.