FAILURE ANALYSIS:


A comprehensive oil analysis suite may include tests such as Ferrography, or SEM/EDX which are both time consuming and expensive. However, such tests


CATEGORY Elemental


provide detailed and definitive information about machinery wear, such as what the wear particles are made of, where they come from and how severe they are. Such information provides reliability professionals with information on a past or imminent failure.


COMPRESSION IGNITION OIL ENGINE


Wear, contaminants, additives Viscosity –


contamination from soot, or fuel


Particle Count Ferrography Oxidation, nitration FTIR


combustion by products, glycol contamination


Viscosity


Contamination from soot, or fuel


Tracks the large iron laden particles for Analytical Ferrography trigger


Oxidation, base stock integrity


Always useful and worthwhile


TAN


Contamination or degradation


TBN


Reserve alkalinity, detergency


Water Mostly to identify Fuel Dilution


Excessive idling or mechanical issue, such as a nozzle dribbling or leaking injector seal Fuel


Soot Combustion cycle indicator, Air fuel ratio To validate the sample


Any detectable amount is probably abnormal or


critical need particle count validity check


Oxidation, base stock integrity


Always useful and worthwhile


Contamination / degradation


GEAR SYSTEMS


Gear boxes generate all sorts of wear, but the


levels can sometimes get confusing


Table 2


Different oil analysis parameters by


machine applications: HYDRAULIC SYSTEMS


Will often validate or clarify particle count; added


value for additives and contamination


Quantitative, somewhat holistic


44 | The Report • June 2017 • Issue 80


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