I have to believe that JD is correct, as he probably knows that particular tractor and I do not. If you are new to tractors and equipment, you need to know that the implement will not suddenly stop when you step on the clutch. My Ford 515 has a PTO brake and it will not stop things very quickly. There is a lot of momentum in anything that is being driven. what the overrunning clutch does is let the power be transmitted in the direction to drive the implement, but to slip, or disengage, or let the shafts turn at different speeds, when the clutch is depressed, and the PTO shaft begins to run slower that the implement shaft. On some tractors, notably the 9n, 2n, and 8n Fords, when you step on the brake, the implement will keep pushing the tractor forward while the momentum of the implement winds down, sometimes into a fence post, or tree, or ditch. The over-running clutch prevents it from doing that.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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