The tongue has a latch system that releases the tongue when the plow is lifted which then causes it to latch on the other side when turning on the headland. The wheels of the plow are pinned to the axle which forces both tires to spin at the same speed. Since the plow desires to always be pulled straight the tongue swings right over to the direction that you are turning, and then latches. The hydraulic version and the clutch lift version work in the same fashion but with slightly different mechanics for the latch release mechanism.
The theory is simple but there is a whole pile of spivets and widgets to make it function properly.
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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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