What should be done if localized scoring is discovered on a pump shaft sleeve during routine maintenance inspection?

Correct Answer: Option D — Correct the cause of scoring and install a new shaft sleeve.

Shaft sleeves are sacrificial components designed to protect the pump shaft from wear. Once localized scoring occurs, the integrity of the seal is compromised. Replacing the sleeve is the only reliable method to ensure a smooth sealing surface, preventing premature failure of the packing or mechanical seal and maintaining pump efficiency.