Causes of Hydraulic Pump Loss of Pressure and How to Fix It

A hydraulic pump is a type of device used to pressurize and push hydraulic fluid through a system of pipes and valves. After a long period of use, hydraulic pumps may encounter damage such as: weak pump, low pump pressure, loss of pressure, etc. To understand the causes and how to adjust pump pressure, join Truong Linh Parts Read the article below.

1. Cause of hydraulic pump loss of pressure

Perhaps due to an internal oil leak, the hydraulic pump lost pressure and weakened. This phenomenon often occurs due to damage to components such as hydraulic valves, oil pipes, and flange connections. The main cause of pressure loss in the pump due to oil leakage is wear and tear on seals and gaskets during operation. Or you did not wrap the tape or rubber tightly before repairing the pump and installed the flange upside down, causing these parts to wear out. Here are some common causes:

1.1. Hydraulic fluid leak:

Leaks are a common cause of pressure loss in hydraulic systems. Leaks can occur anywhere in the system, including seals, pipes, screws, and other components. When hydraulic fluid leaks, it reduces pressure in the system.

hydraulic oil leak

1.2. Surface is abraded

Surface wear can also cause the hydraulic pump to weaken and reduce pressure. Modern pumps create flow and pressure in the system during operation, creating high surface friction and are therefore susceptible to wear.

As a result, the pump no longer sucks in and expels oil as effectively as before, reducing the pump's efficiency. Particularly with sprocket pumps and gear pumps, if the surface or top of the gear is worn, it can cause the connections to become loose.

1.3. Pressure loss safety valve

Some reasons why hydraulic pumps lose pressure are due to the safety valve losing pressure. The valve is activated when the system pressure exceeds the set level, so the valve opens and fluid enters the tank reducing the pressure until it returns to normal. Therefore, every time a pump or hydraulic system is operated, the safety valve pressure must be set higher than the operating pressure of the system.

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