The gear rotor charge pump as its name implies, "Charge Pump" pumps oil to another pump most likely a swash plate type pump used in hydrostat systems. A Swash plate type pump has a variable output thus giving the machine different speeds by pushing the pedal or lever farther or pulling the lever or pedal and reversing the oil flow to the drive motor allowing the machine to back up.
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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