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WaterWorld Magazine • February 2011
A Florida water treatment plant recently discovered that having full-flex (double engagement) gear couplings at either end of a spacer shaft connecting a Lufkin gearbox to a 13, 000 gpm Worthington water pump caused self-exacerbating vibration that eventually destroyed the gearbox twice within 3 months, requiring a full rebuild each time.After the second rebuild and re-installation, LUDECA was called in to monitor positional changes between the stopped and running conditions of the entire diesel engine-driven machine train with its PERMALIGN system to derive true target specifications for the “cold” condition. Thereafter, a laser re-alignment to exact tolerances would be performed to the new targets…
Read entire case study and view photos

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, by Alan Luedeking CRL CMRP