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two clutches
I had a '58 JD420 had two clutches on a single pedal. both on the engine one disengaged the transmission and wheels, the other disengaged the PTO power take off. one powered a hollow tube, the other powered a shaft inside the tube. push the pedal half way down the wheels stopped. push the pedal all the way down the PTO stopped. They called it live PTO. Before that guys would be driving along with their bushhog and pushin the clutch but the bushhog(flywheel) would push them right over the cliff.
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