Horsepower is nothing but a calculated number based on torque and RPM, which is a yardstick to measure work performed. Torque actually moves the load. You can have many different HP ratings for the same engine by varying the RPM- which is a way to get around the 50hp mark on compressors & such that is part of the newer regulations- just derate the engine by setting the governor down. John Deere even has nice directions on their website. A 315 and a 350 Cummins are basically the same unit, but the 315 only turns 1800 RPM instead of 2100. A D8 CAT "only" produces around 300hp, but lots of torque- and it turns pretty slow, so the calculated "horsepower" is low
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Today's Featured Article - Talk of the Town: How to Crank Start a Tractor - by Staff. This interestin discussion is from the Tractor Talk Discussion Forum. Remember that safety is your first priority - make sure you know what you are doing before attempting a potentially dangerous activity!
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