A gear pump pumps when the gears turn so that the meshed area of the gears moves opposite of the oil flow. If you can see, or imagine) the teeth coming toward you where they mesh, the oil flows away from you. The rotation direction depends on which shaft is driven wrom which end, and in which direction. The volume of the area between the teeth carries oil in that direction and the meshing squeezes it out into the exhaust/pressure port. Jim
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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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