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Screw type air compressor oil leakage fault judgment and elimination method

Screw type air compressor oil leakage fault judgment and elimination method
August 23, 2023


Screw air compressors are widely used in various industries, thanks to their efficiency and reliability. However, one common issue that can arise is oil leakage. This article aims to provide a brief guide for diagnosing and resolving oil leakage problems in screw air compressors.


Identify the Problem:

1. Visual Inspection: Begin by examining the compressor for any visible signs of oil leakage. Check the compressor body, oil filter, hoses, and fittings for any oil stains or drips.

2. Monitor Oil Consumption: Keep track of the compressor's oil consumption. If you notice a sudden increase or irregular oil consumption, it could be an indication of a leak.


Potential Causes:

1. Faulty Gaskets or Seals: Damaged or worn-out gaskets and seals can lead to oil leakage. Inspect and replace any faulty components.

2. Loose Connections: Loose fittings and connections can cause oil to leak. Ensure all connections are properly tightened and secure.

3. Damaged Oil Cooler: A damaged or clogged oil cooler can result in excessive pressure, leading to oil leakage. Clean or replace the oil cooler as necessary.

4. Overfilled Oil Level: Overfilled oil levels can cause oil to escape through various openings. Check the oil level and drain any excess oil if necessary.


Troubleshooting and Remedies:

1. Tightening Connections: Carefully inspect all connections and fittings, including hoses, pipes, and joints. Use appropriate tools to tighten any loose connections.

2. Gasket and Seal Replacement: If gaskets or seals are damaged, replace them with new ones of the correct size and material.

3. Clean or Replace Oil Cooler: If the oil cooler is clogged or damaged, clean it thoroughly or replace it with a new one to restore proper functioning.

4. Check Oil Level: Ensure that the oil level is within the recommended range. If it is overfilled, drain the excess oil carefully.

5. Regular Maintenance: Implement a regular maintenance schedule to identify and address potential oil leakage issues before they become major problems. This includes checking oil levels, inspecting connections, and replacing oil filters as recommended by the manufacturer.



Diagnosing and resolving oil leakage in screw air compressors is essential for maintaining their efficiency and prolonging their lifespan. By following the suggested troubleshooting steps and conducting regular maintenance, you can effectively identify and rectify oil leakage issues, ensuring uninterrupted operation of your screw air compressor. Remember, if the problem persists or if you are unsure about the necessary steps, it is always advisable to consult a professional technician.

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