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Cavitation erosion is one of the most important causes of loss of hydraulic pump efficiency, wear and even failure. Although cavitation process is often understood, there is typically little understanding of the joint role of the hydraulic fluid, which is a component of the system, and the operation of the hydraulic pump. In this paper, an overview is provided that describes the fluid properties that most impact on cavitation damage, the cavitation process within the pump and components and the use of computer simulation to prove improved designs that minimize hydraulic cavitation when various types of fluids are used.

Often the use of fine filters reduces the wear and increases the system reliability. On the other hand, the service life of fine filter elements can be much shorter compared with coarser ones, which of course will result in higher filtration costs. Setting up a comprehensive model for the ideal filtration is a challenge, as many parameters have to be introduced, which are difficult to translate into numerical values. However, many of the parameters can be included into some key factors to be considered at the filtration design, which makes the proposed model very useful.