Article originally published on Noria.com.
Used oil filter analysis may provide your best evidence of machine degradation, tracing a history of machine particles created and contaminants ingested over a period of time.
Filters are often discarded when changed or not analyzed as a part of a root-cause failure investigation. This disregards a potentially powerful analysis tool.
Ask your used oil analysis lab to perform a filter analysis for you. The filter is sectioned, and the particles contained within are liberated into a solvent with mechanical and/or ultrasonic agitation for analysis. Typical tests include ferrography and elemental analysis. This could unlock the key to your equipment reliability problems.