1. Turn off the air pump and disconnect the power supply: safety comes first to ensure that the air pump will not start accidentally during the replacement process.
2. Remove the original fan impeller: Depending on the construction of the air pump, it is usually necessary to remove the protective cover and fan cover, after which the fan impeller can be seen. Use a suitable tool (such as a wrench or screwdriver) to remove the set screws or clamping device on the impeller.
3. Checking the new fan impeller: Make sure that the new fan impeller you have purchased is the same size and shape as the original to ensure that it will work properly.
4. Install the new fan impeller: Place the new fan impeller in its original position and secure it with the same screws or clamping device.
5. Check the position and rotation of the fan impeller: Make sure that the fan impeller is aligned with the axis of the air pump, and also manually rotate the fan impeller to make sure that it rotates freely without any obstruction.
6. Install the protective cover and fan cover: Reinstall the removed protective cover and fan cover back into place and make sure they are tight.
7. CONNECT TO POWER AND TEST: Reconnect the air pump to the power supply and test it to make sure that the newly installed fan impeller is functioning properly.
It should be noted that this process may vary depending on the model and brand of the air pump, so it is best to refer to the relevant air pump manual or consult the advice of a relevant professional before operation.