Position control allows the implement to drop to a preset depth and no more. You can manually set the sensitivity of the draft control to react faster or slower to conditions.ĭraft control keeps your tractor from burying the rear tires by raising and lowering the implement as soil conditions change. The plow causes a constant push and relax on the top link, depending on soil conditions. It keeps lifting until the plow comes out of the ground enough to allow the rear tractor tires to stop digging a hole and start moving forward enough to allow the pressure on the rock shaft to diminish and it lowers the plow back into the ground, eventually back to the pre-determined depth that your position control was set at, unless it hits hard dirt again. The rock shaft activates the 3 point hitch to lift the implement out of the ground. The implement pushes the top link against the rock shaft. It has to maintain the three legs of the triangle. The top link is trying to get shorter but it's solid. Since the rear goes down and the implement does not, that puts pressure on your top link. When the rear of the tractor lowers, the implement does not, because it floats. Your plow has a harder time cutting through the soil, putting drag on the tractor, so the rear wheels start spinning instead of pulling forward.Īs the rear wheels spin, they start digging a hole, which lowers the rear of the tractor.
You're in soft easy soil, and all of a sudden you come into some harder soil. Now, let's say you're driving along with a plow in the dirt. There's a rock shaft somewhere at the point that your top link connects to your tractor. There's a triangle formed by three sides:Ģ- the line of your lift arms to implement How draft control works, as explained on my old IH2500b. Draft control actually raises an implement out of the ground, so it cannot be keeping the implement at the same depth. Position control keeps your implement at the same depth.
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