# Replacing the Hydraulic Pump in a Construction Machine

> Discover the key steps in hydraulic pump service and replacement in construction machinery. Learn about the importance of detailed inspection, system cleanliness, and proper venting. Understand the potential issues that can arise if the process is not carried out correctly, and how to ensure the longevity of your new or refurbished pump.

### Hydraulic pump service

The failure or wear of a **hydraulic pump** is one of the most common problems plaguing construction machinery. In such a situation, the damaged part must be **replaced**, which is not that simple. What should you pay attention to during this process?

![pump service](https://wibako.com/media/articles/article-99/14225-1.webp)

### Replacement of the hydraulic pump due to its wear

The hydraulic pump in a construction machine is most often replaced due to the **natural wear** of this component. In such a situation, we can invest in a new part or commission the repair of the old pump. This is done by **specialized workshops**. Let's pay attention to whether the company gives us a **warranty** for the proper operation of the system after the repair and whether it has the appropriate class of equipment.

During the pump replacement, a **detailed inspection** of the entire hydraulic system is necessary. We are looking for potential **leakage** points, we remove all **contaminants**. Various mechanical elements that, for example, fell out of the pump can be particularly dangerous.

If we forget about them, the system will be **damaged** even after replacing the pump with a new one. So we clean the pipes, oil tank and of course we replace the oil itself and the filters.

![pump service](https://wibako.com/media/articles/article-99/17290-1.webp)

During the installation of a new or refurbished pump, we must ensure **cleanliness**. Let's not allow any dirt to get into the pipes. In many situations, it is even recommended to **replace the hoses** with new ones, but let's remember not to leave traces of **crimping**.

Before the first start of a new or refurbished pump, do not forget about its **venting**.

![pump disassembly and verification](https://wibako.com/media/articles/article-99/17290-2.webp)

### Replacement of a pump that has been damaged

If we are replacing a pump due to its failure, we will have more work related to **cleaning the system**. It is very likely that various mechanical elements or contaminants have been found in the pipes or tank. The entire system must therefore be subjected to **thorough flushing**. This mainly concerns pipes, radiators, tanks, hydraulic motors, actuators and distributors.

The rest of the activities are similar to those we undertake when replacing a worn pump. However, let's remember that after installing a **new device** and its short start-up, check carefully whether **filters** and **oil** do not collect impurities or - worse - **metal filings**. If so, we flush the system again.

![parts verification](https://wibako.com/media/articles/article-99/17290-3.webp)

A properly replaced hydraulic pump **should work** in the machine without any problems. However, it is worth observing this, at least for the **first few hours**. If the operator notices that the machine's power has **decreased**, it will be necessary to take another look at the effectiveness of the pump's operation. This may be a sign that the device is being damaged again - for various reasons. The **condition of the oil and filter** alone will tell us a lot.

Published: 2024-03-25

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Source: https://wibako.com/about-us/blog/99-replacing-the-hydraulic-pump-in-a-construction-machine
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