Abstract
The bearing metal of a marine diesel engine is basically disassembled every five years as a part of a special survey. However, this disassembling and assembling works require a large amount of manpower and time. Moreover, it is also dangerous. The classification society to which the authors belong has dedicated considerable time and efforts to examining whether used oil analysis can be applied as an alternative to the aforementioned periodic survey.
This paper reports on the correlation between the used oil analysis results by ferrography and the inspection results of 2 stroke diesel bearing metal obtained at special surveys.
As a result, the authors believe that the continuous engine system oil ferrograph analysis can be effective as one form of a condition monitoring based survey.
