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This paper discusses a procedure for selecting the correct material for a hydraulic component. The discussion includes the variables of pressure duty cycle, temperature duty cycle, component specifications, manufacturing processes, reliability requirements, and available materials. The goal of the procedure is to minimize component life cycle cost. It is shown that 7075-T73 Aluminum is the best material for selected 34 MPa (5000 psi) hydraulic components.

This paper discusses a microprocessor based Hydraulic Circuit Breaker (HCB) that overcomes historical concerns surrounding hydra-mechanical configurations. Specifically, this paper discusses: description, operation, flow sensor selection, software development, reliability, dynamic testing, aeration testing, and live fire testing of the HCB.

This paper discusses the motivation for fluid power noise abatement programs, establishment of program milestones, mathematical models for understanding and controlling fluid power system noise, guidelines for obtaining reproducible acoustical measurements, system modification techniques to achieve noise reduction, and the important role of management in the conduct of an effective noise abatement program.