What is a common indication of bearing failure in a pump?

Excessive noise is a common indication of bearing failure in a pump because it often signifies that the bearings are experiencing wear or damage. As bearings begin to fail, they can produce a range of unusual sounds, such as grinding, knocking, or rattling, which indicate that the inner workings are not functioning smoothly. This increase in noise is often a direct result of misalignment, lack of lubrication, or deterioration of the bearing materials.

In contrast, low vibration typically suggests that the pump is operating smoothly, as excessive vibration is often associated with imbalance or structural issues. Stable pressure does not indicate any problems at all; instead, it suggests that the pump is functioning properly under normal conditions. Warm discharge can result from various factors, including operational efficiency or fluid properties, but it is not a specific sign of bearing failure. Thus, excessive noise stands out as a primary signal that immediate attention may be required to prevent further damage to the pump.