How To Replace Impellers on Centrifugal Pumps?

Removing a centrifugal pump impeller from the shaft involves several steps.

Tools Needed

Wrench set (including adjustable wrenches)

Screwdrivers (flat and Phillips)

Hammer or mallet

Puller tool (if necessary)

Safety goggles and gloves

Steps to Remove the Impeller

Safety First:

- Wear safety goggles and gloves to protect yourself.

Access the Impeller:

- If the pump is mounted, you may need to remove the pump casing or cover to access the impeller. This typically involves unscrewing bolts or nuts that hold the casing in place.

Inspect the Mounting:

- If there is a set screw, locate it (usually on the side of the impeller hub).

Loosen Set Screws:

- Use the appropriate wrench or screwdriver to loosen and remove any set screws that are securing the impeller to the shaft. If the screw is stuck, you may need to apply penetrating oil and allow it to sit for a while before trying again.

Remove the Impeller:

- If the impeller is not coming off easily, you may need to use a puller tool. Attach the puller to the impeller and gently apply pressure to pull it off the shaft.

- If there is no puller available, you can tap lightly on the back of the impeller with a hammer to help break the bond, but be careful not to damage the impeller or shaft.

Check the Keyway:

- If the impeller is secured by a key in the keyway, ensure the key is not damaged and can be reused. If it’s stuck, remove it carefully.

Inspect Components:

- Once the impeller is removed, inspect the shaft, impeller, and any seals or gaskets for wear or damage. Replace any damaged parts as necessary.

Installation of Impeller

Retaining Nut: Some impellers are secured with a retaining nut that screws onto the end of the shaft.

O-rings and Gaskets: There may also be O-rings or gaskets that provide a seal between the impeller and the pump casing.

Conclusion

Once the impeller is removed, you can proceed with any maintenance or replacement as needed.

Contact our sales team when you need to replace your impellers, we have all sizes impellers available in stock, see part numbers below: