Identifying a Guide Bearing Rub Using Vibration Analysis

Hydro Review, May 2014, by Bernard F. Boueri.
http://www.hydroworld.com/articles/hr/print/volume-33/issue-4/cover-story/identifying-a-guide-bearing-rub-using-vibration-analysis.html

"When commissioning a hydro unit, proper use of vibration monitoring can help identify problems such as a rub on the guide bearings. Catching issues early can allow the problem to be fixed quickly, preventing units from operating inefficiently and limiting unplanned outages."