| Summary: | Mechanic systems are lubricated with oil and their analysis is one of the best practices among industrial routines. It allows for measuring the number of elements and particles in the lubricant. Furthermore, it improves the equipment health monitoring. In mining, the dumpers are a piece of critical equipment that affects production. The continuous monitoring assures systematic reliability. This work can serve as a good reference for engineers who intend to understand oil data and promote the development of lifetime models of components. This paper studies the lifetime expectation of the main components of T6, T16, TH315, and JOY dumpers considering oil data. These lifetimes were analyzed by using both, the Cox proportional hazard model and a new robust version of the same model that is the main contribution of this work. The results show that robust version introduced has better performance than Cox classical model. The correlation analysis from oil variables, and operational context information are also included. It allowed us to identify the components and dumpers with a major risk of failure and their relationship with the work site.
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