Training Details


S1 Hydraulic Systems

Course Date
Coming Soon
Course Duration


This course provides an overview of hydraulic systems found on Caterpillar mobile equipment. The participant will be provided information regarding hydraulic principles, components, testing and adjusting. Tooling, troubleshooting, schematics and control systems will also be covered.


Heavy Duty Technician Certification is required. Students must provide their own safety glasses, steel toed footwear, hard hats and fire retardant coveralls with reflective stripe.


After completion of the course, the participant will be able to understand:

  • Hydraulic Principles, including stating Pascal’s law and Bernoulli’s principle, and calculating pressure, flow, volume, effective area, and hydraulic horsepower.
  • Hydraulic Valves, including the design and operation of the pressure relief valve, pressure reducing valve, and pressure differential valves; the design and operation of the by-pass flow control and compensated flow control valve; and the design and operation of the direction control valve.
  • Fluid Power Graphic Symbols and how to trace the oil flow and how to name components on schematics.
  • Hydraulic Pumps, including the operating principles for gear, vane, and piston pumps; the seven basic types of pump failure; and the distinguishing feature of each.
  • Hydraulic Test Tooling, including safety when installing flow meters and when pressure testing; inline flow meter testing; and analyzing results and recommended repairs.
  • 950G/966G Hydraulic System, including the operation/testing and adjusting of the pilot system and main implement valves.
  • Load Sensing Pressure Compensated Hydraulic Systems, including the operation/testing and adjusting of the hydraulic pump, implement valves and signal network.
  • Proportional Priority Pressure Compensated Hydraulics similarities and differences.

Successful completion of a written or online examination with a passing grade of 80%.

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