RAW, whether or not it was true, the worm gear drive was blamed for the Fordson's tendency to flip. When you push the clutch in on a hypoid geared tractor, you instantly remove all torque from the wheels and the front end comes down. Disengaging the clutch on a worm gear, however, effectively sets the brakes on the rear wheels. So there is still torque to hold the front end of the tractor in the air. And if the tractor's front end is rising rapidly, it will have significant angular momentum. It seems reasonable to think that in the right circumstances the angular momentum of the tractor combined with the locked-up rear could cause it to continue to flip after the clutch is disengaged.
I looked into this a little further. It seems that the later Fordsons with the worm gear on the bottom of the differential had a greater tendency to flip. So it seems that the higher CG caused by larger rear wheels was a contributing factor.
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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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