Why the vacuum pump has abnormal voice?

1. Damage to pump parts: Damage to pump parts, such as impeller, bearing, etc., will lead to the phenomenon of pump rattling.

2. Insufficient lubrication inside the pump: the pump is used for a long time, the lubricant will be consumed, resulting in a lack of lubrication inside the pump, which leads to rattling phenomenon.

3. Gas enters into the pump: when the gas enters into the pump and causes compression, it will produce vibration and sound, resulting in the vacuum pump rattling phenomenon.

4. Loose bolts: After a long time of use, the bolts of the internal parts of the pump may be loosened, which may cause the rattling phenomenon.