Course Objectives After completion of the course, participants are expected to: • Gain an understanding of basic hydraulics. • Learn about how hydraulics work - hydraulic training on how common hydraulic components operate and interact with each other. • Learn more about reading and understanding hydraulic schematics. • Review preventative maintenance procedures. • Discuss troubleshooting of hydraulic systems. Course outline Ø Introduction to hydraulics • What is Hydraulics? • Where hydraulics are used? • Why use hydraulics? Ø Pressure and flow • Pressure concept • A discussion of hydraulic fluids. • Selecting a pump • Fluid viscosity Ø Hydraulic pumps • Operating principles of variable displacement pumps • Principles of variable displacement pump controls • Pilot operated pressure compensators • Constant horsepower controls • Load sensing controls Ø Hydraulic cylinders • Construction and operating principles • Maintenance and troubleshooting • Common causes of cylinder failures Ø Accumulators: their applications and uses • Piston and bag types • Pre-charge calculations and limits • Application and design Ø Pressure Control Valves and their Characteristics • Establishing a pressure setting sequence • Main system relief valves • Port vs. cross port relief valves • Pressure reducing valves • Direct vs. pilot operated valves • Vending pilot operated valves • Remote and multiple pressure setting • Field converting pilot and drain line connections Ø Directional Control Valves • Basic operation, characteristics and control • The importance of selecting the proper spool type • Maintenance and repair of stuck spools and burned out solenoids • Piloting consideration for pilot operated valves Ø Check Valves • Pilot operated check valves • Pre-fill valves, operating principles • Logic cartridge systems, introduction, maintenance • Operations, repair, set-up and precautions Ø Building and analyzing hydraulic circuits • Circuit design considerations • Designing a Hydraulic Circuit, to give optimum utility - Practical exercises included Ø Maintenance and troubleshooting • Troubleshooting with Hydraulic Circuit Drawings • Hydraulic Leakage • Pump and Motor Troubleshooting • Accumulator Safety Considerations