How to know when we should replace the hydraulic oil of the cone crusher hydraulic system?

June 13, 2024

As we have talked in the last article, it is important to maintain the hydraulic system so as to keep the cone crusher running safely and efficiently. Among the maintaining process of the hydraulic system, replacing the hydraulic oil is a key step that should be conducted carefully. However, for some of us, we may not know when we should replace the existing hydraulic oil. So, how to judge whether the hydraulic oil should be replaced? Here are the three signals for you:

1. Oxidation Degree

Usually the color of new hydraulic oil is relatively light, and there is no obvious odor. However, with the extension of the use time, a long-term oxidation under high-temperature can deepen the color of the hydraulic oil. If the color of the cone crusher hydraulic oil is found to be dark brown and accompanied by a bad smell, it means that the oil has been oxidized and needs to be replaced with new oil.

2.Water Content

The water content of the cone crusher hydraulic oil will affect its lubrication performance. When a large amount of water enters the hydraulic oil, a turbid mixture will be formed because water and oil do not merge. At this time, we need to replace the hydraulic oil to avoid affecting the performance of the cone crusher hydraulic system, and further affecting the performance of the cone crusher.

3.Impurity Content

During the operation of the cone crusher, due to constant collisions and grinding between components, it is easy to produce debris, which will inevitably enter the hydraulic oil. If the hydraulic oil contains a large amount of impurities, it will not only reduce the quality, but also may cause damage to the components of the cone crusher hydraulic system. Therefore, after the hydraulic oil has been used for a period of time, it is important to check the content of impurities in the hydraulic oil. If there are a lot of visible impurities, replace the hydraulic oil immediately.


Ok, the above is all about how can we know when we should replace the hydraulic oil of the cone crusher hydraulic system. The oxidation degree, water content, and impurity content are the key three signals that helps us to judge whether we should replace the hydraulic oil or not. With several times of practice, you will know it better and become a master!

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