The grid in the attached PDF lists the most likely symptoms and causes of pump failure or less than expected performance. While all possible conditions cannot be listed, the listing is a good starting point from which the investigation can proceed.

Troubleshooting a mechanical or hydraulic problem with a centrifugal pump can be a long and complicated process. Often, the root cause is not readily obvious, and having more than one symptom present can cloud the picture even further. In truth, the root cause usually can be traced to a relatively few sources based on the symptoms present. The ability to distinguish between a symptom and a cause can speed the process up considerably.

The table [link at bottom of page] to the right lists a few of the “most likely” symptoms and causes of pump failure or less than expected performance. While all possible conditions cannot be listed, the listing is a good starting point from which the investigation can proceed.