Hydraulic Systems (Design, Operation and Maintenance)

Course Outlines

OBJECTIVES

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
 Introduction to hydraulics
• What is Hydraulics?
• Where hydraulics are used?
• Why use hydraulics?

 Pressure and flow
• Pressure concept
• A discussion of hydraulic fluids.

• Selecting a pump
• Fluid viscosity

 Hydraulic pumps
• Operating principles of variable displacement pumps
• Principles of variable displacement pump controls
• Pilot operated pressure compensators
• Constant horsepower controls
• Load sensing controls

 Hydraulic cylinders
• Construction and operating principles
• Maintenance and troubleshooting
• Common causes of cylinder failures

 Accumulators: their applications and uses
• Piston and bag types
• Pre-charge calculations and limits
• Application and design

 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






 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

 Check Valves
• Pilot operated check valves
• Pre-fill valves, operating principles
• Logic cartridge systems, introduction, maintenance
• Operations, repair, set-up and precautions

 Building and analyzing hydraulic circuits
• Circuit design considerations
• Designing a Hydraulic Circuit, to give optimum utility - Practical exercises included

 Maintenance and troubleshooting
• Troubleshooting with Hydraulic Circuit Drawings
• Hydraulic Leakage
• Pump and Motor Troubleshooting
• Accumulator Safety Considerations