Routine measurements on the LT Cooling Fresh Water Pump No.3 revealed abnormal bearing envelope values.
Nothing had failed yet.
But the vibration signature suggested that something was developing inside the electric motor.
What the Data Revealed
Envelope analysis identified clear BPFO (Ball Pass Frequency Outer Race) harmonics.
For vibration analysts, this is one of the strongest indicators of outer race bearing damage.
The machine was still running.
The bearing was already failing.
Our Recommendation
Rather than waiting for the defect to grow, we advised replacing the drive-end bearing and validating the repair with follow-up measurements.
The Outcome
The inspection confirmed bearing wear.
After replacement:
• Bearing defect frequencies disappeared
• Envelope levels dropped significantly
• A second verification confirmed stable machine condition
Estimated avoided repair cost: USD 15,438
Why this matters
Bearings rarely fail without warning.
The warning is already there—hidden in the frequency spectrum.
The earlier you detect it, the smaller the repair.
The longer you wait, the more components become involved.
That’s why condition monitoring is not about measuring vibration.
It’s about making the right maintenance decision at the right time.
