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The history of hydraulic systems can be traced back to the 1646, when Braise Pascal performed the first hydrostatic experiment.
He used a Pascal’s barrel to investigate the effect of a force applied at one point of the fluid and how it is transmitted to the other sections within an enclosed system. The outcome of his experiments resulted in a scientific law/principle called Pascal Law or Pascal Principle.
Trouble Shooting list for hydraulic power unit ,including how to wire,how to check flow / pressure in and out from hydraulic gear pump,hydraulic valves,hydraulic cylinders.Also with some hydraulic system design information.
You can check our Trouble Shooting list for single acting power unit from this guide handbook.