Axial piston variable pump A10VO series 5x

All About Hydraulic Pump Repair

How important is a pump in a hydraulic system? No doubt, when there is high-pressure fluid flow, then that hydraulic system will have a pump. Almost every large, medium or small hydraulic systems will pressurize the fluid stored in the reservoir with a hydraulic pump and pass it towards other hydraulic system components. That is, a hydraulic pump is important for converting mechanical energy to hydraulic energy. Small damage to these hydraulic pumps will inversely affect the performance and efficiency of the hydraulic system. So, proper maintenance is required for a hydraulic pump. Otherwise, it will cause costly and unrepairable damages to your hydraulic system.

Also, under proper maintenance, there are chances for hydraulic pump failures. But, the severity of the damage can be minimized. If your hydraulic pump fails to provide the required performance and with your hydraulic industry experience you recognized it as minute damage. Then, hydraulic pump repair can be performed by yourself without depending on a technician (Only if you have enough experience and knowledge in hydraulic pumps).

All About Hydraulic Pump Repair

There are different hydraulic pumps types available in the market that differs on its application and construction. Discussing hydraulic pump repair tips for all these types are not practical. So, some of the common hydraulic pump failures, causes, and hydraulic pump repairing tips are discussed below.

Before directly dismantling or repairing your pump, it is necessary to inspect the system and to understand the root cause of that failure. For inspection, you need to check the following.

Pump type and its specifications.

What are the symptoms the pump indicates before failure?

When the oil was refilled for the last time?

The type of oil refilled and whether it is compatible?

Previous maintenance history, and more….

The common signs of hydraulic pump failure are loud noises, high oil temperature, and slow or inefficient pump. How to repair hydraulic pumps indicating these signs of failure? The causes and remedy for each of these hydraulic pump failures are listed below.

Also, Read: How Hydraulic Pump Work

Noisy Hydraulic Pump

One of the major benefits of the hydraulic system is its comparatively quieter operation. So, noise from the hydraulic pump or any other system component can be identified easily. The causes for the noisy hydraulic pump are cavitation, aeration, coupling misalignment, and worn/damaged pump. Cavitation is the formation of gas bubbles and this issue can be eliminated by cleaning/replacing the filtration components, or by replacing the hydraulic fluid. Similarly, aeration is air entrapped in the hydraulic fluid and its remedies include bleeding air from the system, tightening leaky connections, replacing seals, filling fluid to the required level, etc. By properly aligning the seals, couplings and bearings, one can efficiently remove coupling misalignment issues. The only solution to worn/damaged pump is the replacement.

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