1. Switch off the power to the air compressor and wait for the machine to stop running completely.
2. Open the oil drain plug at the bottom of the air compressor to let the old oil flow out.
3. Filter the new oil with a strainer to ensure its quality and cleanliness.
4. Switch on the power of the air compressor and wait for the machine to start and run normally.
5. Switch off the power, open the oil drain plug at the bottom of the oil drum and let the new oil flow out.
6. Add new oil to the oil drum until the oil level reaches the specified mark.
7. Switch on the air compressor and wait for the machine to start and run normally.
8. Switch off the power and take care to ensure that the new oil is added to the correct position.
9. Remove the oil filter, clean it and reinstall it.
10. Switch off the compressor and wait for the machine to stop completely.
11. Open the oil drain plug at the bottom of the air compressor to allow the old oil to flow out.
12. Filter the new oil with a strainer to ensure its quality and cleanliness.
13. Switch on the power of the air compressor and wait for the machine to start and run normally.
14. Switch off the power and open the oil drum.