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Hydraulic Attachment

Here's How the Hydraulic Pump Works

Created By: Hyprowira | Published Date: 26 August 2019 | Last Modified: 26 August 2019

Hydraulic pump is the most important component in a hydraulic system. Without a hydraulic pump that works well, we can be sure that the hydraulic system will not work optimally. In a way, a hydraulic pump is the "driving" of the entire hydraulic system. How exactly does a hydraulic pump work? Check out the following reviews of hydraulic pumps.


Get to know the Hydraulic System

Before discussing the hydraulic pump, it helps you understand about the hydraulic system. What is a hydraulic system? Basically, a hydraulic system is a series of components that utilize liquid (fluid) to produce mechanical energy.

The hydraulic system is a clear example of the application of Pascal's Law (1658), namely "If a liquid is subjected to pressure, then that pressure will propagate in all directions without increasing or decreasing its strength."

Currently the use of hydraulic systems is very wide, you can find it in various fields, ranging from property to automotive. You might even have used it before, such as when using a jack or press.

So how do hydraulic systems actually work to facilitate human life?


How Hydraulic Systems Work

As mentioned in the previous point, a hydraulic system can produce mechanical energy by utilizing liquid. The liquid is treated with a set of components and through a series of processes until it finally becomes a movement. Some common components found in hydraulic systems are as follows:

Hydraulic Tank

Hydraulic tank or hydraulic tank serves to accommodate the liquid that is the driving force (usually oil). This component also functions as a cooler for oil that has gone through a series of hydraulic systems.

Hydraulic Pump

The function of a hydraulic pump is to produce hydraulic flow from liquid that enters the hydraulic system.

Control Valve

The control valve has the task to direct the oil to the components that need it.


Actuators are mechanical components that have a function to control hydraulic systems. This component is able to convert hydraulic energy into mechanical.

Pressure Relief Valve (Main Relief Valve)

The pressure regulating valve has a function as a pressure controller that enters a hydraulic system. Too much pressure can cause the system to malfunction or even not function.


The filter functions as a filter for dirt or contaminants that can interfere with the circulation of the hydraulic system. It is expected that by using a filter, the level of oil cleanliness can be achieved in accordance with ISO 4406, NAS 1683, or SAE AS4059 standards.

Filter performance or ability is expressed using the beta (ß) ratio, which is the ratio of the number of particles before and after going through the filter for the same particle size.

Hydraulic Attachment

Hydraulic Attachment is a device that is connected with a hydraulic system, for example hydraulic generators, hydraulic magnets, hydraulic compressors, and various other types such as those manufactured by Dynaset from Finland.


From the components that have been mentioned, you could say the hydraulic pump is a crucial component in a hydraulic system. The following is a brief explanation of how hydraulic pumps work.


How a Hydraulic Pump Works

The hydraulic pump starts working when the piston is attracted. With the piston being attracted, the space inside the pump is getting wider. The greater the space inside the pump, the smaller the pressure. This is because the air pressure is much higher than the pump room pressure. This pressure difference then makes the fluid automatically enter the pump room via a check valve in the inlet channel.

After the piston is released or pushed in, the piston will press the fluid. Fluid will try to come out. This great pressure when the fluid tries to exit is what then releases the potential energy of the fluid. After going through obstacles in the hydraulic system circuit, the new fluid will produce pressure.


From this it can be seen that the workings of a hydraulic pump in a hydraulic system are crucial. Even so, it should be understood that the hydraulic pump does not produce pressure, but instead produces a potential energy flow from the fluid. Without this flow, mechanical energy will not arise from the hydraulic system.