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 - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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