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How to Check the Oil Level in a Screw Air Compressor

How to Check the Oil Level in a Screw Air Compressor
October 25, 2023

The oil level in a screw air compressor is a crucial aspect that needs to be regularly monitored to ensure smooth and efficient operation. By maintaining the correct oil level, you can prevent potential damage to the compressor and prolong its lifespan. In this essay, we will discuss the procedure for checking the oil level in a screw air compressor.


To begin with, it is essential to locate the oil sight glass or oil level indicator on the compressor. This glass is usually transparent and positioned at a convenient height on the machine. Once you have located the sight glass, make sure the compressor is turned off and the motor is not running.


Next, clean the sight glass using a cloth or paper towel to remove any dirt or oil residue that may obstruct visibility. It is crucial to have a clear view of the oil level to obtain an accurate reading.


After cleaning the sight glass, observe the oil level. The oil should be within the designated range indicated on the sight glass. Typically, there will be two marks, a minimum and a maximum, indicating the acceptable oil level limits. Ensure that the oil level is between these two marks. If the oil level is below the minimum mark, it is necessary to add oil to bring it back to the appropriate level.

screw air compressor

To add oil, refer to the air compressor user manual for the specific type and quantity of oil required. Using the wrong oil can lead to performance issues or even damage the compressor. Carefully pour the recommended amount of oil into the compressor's oil fill port or oil reservoir, taking care not to overfill.


Once the oil has been added, recheck the oil level using the sight glass. If the level is now within the acceptable range, you can proceed to start the compressor. However, if the oil level remains below the minimum mark even after adding oil, it is advisable to consult a professional technician for further inspection and maintenance.


In conclusion, regularly checking the oil level in a screw oil-free silent screw blower is vital for its optimal performance and longevity. By following the aforementioned steps, you can ensure that the oil level remains within the recommended range, thus preventing potential damage and ensuring smooth operation.

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