> But a heavier tractor needs more power to move itself and the load it is pulling.
There are numerous ways engine horsepower is lost on its way to the drawbar, including rolling resistance. But the big one is wheel slip, particularly in lower gears. All other things being equal, a heavier tractor will have less wheel slip than a lighter one. But in the end, what counts is how much power is delivered to the drawbar. And the Nebraska tests clearly show the 5010 has over a third more drawbar horsepower than the 4020 in every gear. It's silly to claim a stock 4020 can out-pull a stock 5010.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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