Predictive Maintenance – Part II

In hydraulic and lubrication oil systems, friction,
wear, leakage and excess temperatures can contribute to the operating fluid
becoming contaminated, with solid particle contamination or water, for example.

This contamination then goes on to cause errors in
components and subsystems and ultimately in the system as a whole. Furthermore,
the normal ageing process of the fluid causes performance losses that often
result in system downtime.

In order to prevent these time-consuming and costly
consequences, monitoring the condition of the operating fluid is of major
significance. The condition of the operating fluid is comparable to a
“fingerprint” of the overall condition of the system.

Implementing a predictive maintenance strategy allows
the service life of all critical machine elements to be fully utilised, by
detecting a variation from the fluid’s normal condition early on.

This is the basis for a significant reduction in
operating costs resulting from costly unplanned system downtime being
eliminated or minimised. As soon as the beginnings of a variation are detected,
the remaining service life of the corresponding parameter or component can be
estimated and used for ongoing production in a controlled manner. 

spare parts can be procured and maintenance with minimal costs can be

A predictive maintenance strategy thus allows
available resources to be utilised optimally, reducing the total costs for the
machinery throughout its service life (life cycle cost (LCC)).

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