How Vibration Analysis Prevented a Critical Cooling Tower Failure During Peak Summer Demand
A seemingly minor vibration anomaly turned out to be a ticking time bomb—and thanks to vibration analysis and predictive maintenance, disaster was averted.
It all started six months prior to what could have been a catastrophic failure. A small spike was detected in the vibration signature of a cooling tower motor: just 0.16 in/s 0-pk at motor speed. While subtle, this change was enough to raise a red flag for our team at Rotating Equipment Specialists.
Over the following months, the vibration amplitude steadily increased, eventually reaching 1.15 in/s 0-pk—a level that clearly indicated an impending failure. Had this been ignored or gone undetected, the cooling tower could have gone down during the height of summer, when it’s most critical to plant operations.
Instead, the early detection allowed for a planned repair, scheduled during a controlled window. No production was lost. No emergency breakdowns. No scrambling for parts or overtime costs.
Once repairs were made, including replacement of the worn grommets, shim spacers, and a damaged fiberglass drive shaft, the post-repair vibration dropped dramatically to just 0.007 in/s 0-pk, confirming the issue had been fully resolved.
A quick Root Cause Analysis (RCA) revealed the problem: several mounting bolts had worked loose over time, causing excessive wear on the grommets and shims, which then led to drive shaft degradation.
This case is a textbook example of how predictive maintenance saves money, time, and headaches. It also shows the keen diagnostic skills of our technicians, whose attention to detail helped prevent an operational crisis.
At Rotating Equipment Specialists, we believe that every vibration tells a story. This time, it told one of prevention, precision, and success.
