Keywords :
Contamination control; Filter management; Hydraulic failures; Maintenance policy; Mean-time-between-failures; Stepwise multiple regression; Hydraulic equipment; Maintenance; Planning; Systems engineering; Hydraulic failure; Hydraulic system; Maintenance practices; Mean time between failures; Property; System failures
Abstract :
[en] The article investigates the influence of maintenance practice on the MTBF (Mean-Time-Between-Failures) of hydraulic system failures. Firstly, the paper starts by challenging the argument that contamination is at least 70% responsible for hydraulic system failures. Secondly, independent maintenance variables that potentially influence MTBF are synthesised and investigated via Person’s correlation factor. Although some predictors (variables) show good prediction properties, however, show discrepancy while being subjected to different maintenance policies. Eight selected predictors were subjected to Stepwise Multiple Regression (SMR) for selecting the most appropriate solution. Finally, four main predictors (p < 0.05) are selected: Machine Age (MA), Filter Replacement Time (FRT), Failure Analysis Personnel (FAP) and Maintenance Policy (MP) applied. The results show that the suggested model shows good prediction properties (R2 = 83.51) in estimating the MTBF of hydraulic machines. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.
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