Mike, the "brake" locks the ring gear to the hub, engaging the hydraulic motor through the planetary gear train to the wheel hub when hydraulic drive pressure is applied. Perhaps "clutch" would be a better word, but that's not what DEERE calls it.
Typically, combine rear-wheel assist setups work the same way so when there's no assist needed the the geartrain and motor are disconnected from the wheel hub automatically.
Key # 1 is the "Brake Plate".
In the diagram below, Key # 31 is one of the (9) pistons that apply the "brake" when HFWD is engaged and hydraulic pressure acts on them.
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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
... [Read Article]
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