The function of the pump is to generate flow in the system

Posted by hong yi on October 19th, 2019

The hydraulic pumps are all positive displacement, which means that the outlet flow rate and the inlet flow rate are sealed. A small amount of fluid is designed to leak to lubricate and cool the pump components.

The function of the pump is to generate flow in the system. Resistance or load caused by the system determines the pressure. If the pump flow returns to the tank, no pressure will be generated. If a load or restriction is applied to the pump flow, the pressure will rise to overcome the resistance.

When there is a hydraulic problem, the axial plunger pump is usually one of the replaced parts, but it should actually be one. Why? Because pumps are time-consuming components and expensive. It should not be changed before many tests are carried out. Simple tests and inspections. Is the motor running? This sounds simple, but it should not be ignored.

Check the oil level. This should also be obvious because it is usually checked before the pump is replaced. The oil level should be 3 inches above the pump suction. Otherwise, a vortex can be formed in the reservoir to allow air to enter the pump. If the oil level is low, the leak location in the system.

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