Abstract
Ferrographic oil analyses are made on lubricating oil samples from the fundamental tests using a wear test machine and those from a number of main diesel engines in sererie. The failure scores on ferrous and non-ferrous materials are determined from these analytical results.
The diagnosis method using these scores is applied to actual engines. As the results, it is found that the failure scores are closely connected with the wear conditions of sliding components. In fact, a sign of a failure could be cought before the catastrophic failure of the sliding components.
It is concluded that this diagnosis method by Ferrography is useful to maintain the sliding components of main diesel engines.
