Abstract
AbstractResearch into the failure and repair characteristics of such diverse mechanical equipment as centrifugal pumps and compressors, comminution machinery, electrical generators and offshore pipelines has shown that their repairs and overhauls seldom return their performance to a condition which is ‘as good as new’ in a reliability sense.The research reported here was commissioned to test whether this conclusion applied to mining machinery, which was overhauled to exacting maintenance standards. The results showed that these machines eventually exhibited a similar deterioration, which was statistically, significant. Furthermore, the escalation in their real costs of overhaul was of such a magnitude as to justify their systematic and frequent replacement. The evidence suggested that this deterioration in life performance resulted from the wear out of machine components and the bodies of these machines, which could not be remedied properly by successive overhauls.
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