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Hydraulic Troubleshooting

Hydraulic Troubleshooting

The Hydraulic Troubleshooting online training course covers understanding hydraulic systems, using schematic diagrams, installation procedures, maintenance, cleanliness and safety. Includes tubing cutting, bending, and flaring, identification and selection of proper fluid, and charging the system. Discusses planned mechanical maintenance, specific repair/replacement recommendations, system diagnosis, and troubleshooting. This course has no prerequisites. Hydraulic Troubleshooting is available in online maintenance training and course manual training formats.

Test your basic electrical troubleshooting knowledge! Take a 7 question quiz.

Review a full training course list for Mechanical Systems Technician

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  • Online Course & Test $85.00

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TPC Training is authorized by IACET to offer 1.0 CEUs for the Hydraulic Troubleshooting training course.

Lesson 1 - Hydraulic Systems


System components; Hydraulic fluids; Tracing the system; Schematics; Cutaway drawings; Mechanical setup

Learning Objectives:
– Name the six basic elements of a hydraulic system.
– Explain the functions of hydraulic pumps, actuators, control valves, conductors and connectors, hydraulic fluid, and fluid storage and conditioning
– Describe how to trace a system.

Lesson 2 - Hydraulic Schematic Diagrams


Definition, kinds, and characteristics of schematics; Lines; Symbols; Flow patterns; Tracing a circuit; Sequence valve circuit

Learning Objectives:
– Name three basic types of hydraulic diagrams, and explain the purposes of each.
– Describe how a valve symbol is constructed.
– List the steps to follow when reading a schematic diagram.
– Identify common hydraulic symbols.

Lesson 3 - Installing Hydraulic Components


Safety; Cleanliness; Pump, drive, control valves, and mechanical valve installations; Pump start-up; Valve port identification

Learning Objectives:
– Explain the importance of cleanliness in hydraulic installations.
– Describe possible consequences of neglecting safety precautions.
– Explain how motor and pump shafts are aligned before coupling.
– Explain the correct method for checking direction of pump rotation.
– List several useful hints for solenoid valve installation.

Lesson 4 - Installing Pipes and Tubes


General installation procedures; Tube flaring; Checking the flare; Tube bending and assembly; Hose, seal, reservoir, filter, heat exchanger, and actuator installation

Learning Objectives:
– Explain how pipe sizes are specified.
– Name the common types of pipe joints.
– List six important rules for good piping installation.
– Describe the advantages of hydraulic tubing over pipes.
– Describe the correct methods for bending and flaring tubing.
– List the key points for correctly installing hydraulic hoses, seals, reservoirs, filters, and actuators.

Lesson 5 - Selecting Hydraulic Fluids


Viscosity; Resistance to chemical and physical changes; Low-temperature properties; Demulsibility; Antirust properties; Compatibility

Learning Objectives:
– List ten important properties of hydraulic fluids.
– Explain the difference between hydrodynamic and boundary lubrication.
– Explain what a fluid's viscosity index means.
– Define demulsibility and emulsibility.
– Describe how to read a viscosity-temperature chart.
– List the proper procedures for installing hydraulic fluid.

Lesson 6 - Planning System Maintenance


Inspections; Maintenance requirements; Fluid level; External leaks; Operating pressure; Fluid quality; Filter maintenance; Reconditioning

Learning Objectives:
– List the major categories of hydraulic system maintenance.
– Name and describe the six essential items in a maintenance file.
– List the steps involved in reconditioning a hydraulic component.
– Explain how to set up a maintenance plan for a typical hydraulic system.

Lesson 7 - Troubleshooting Systems


Diagnosis and symptoms; Evaluating machine history; Determining the cause; Providing the solution; Tools and gauges; Troubleshooting charts

Learning Objectives:
– Describe the troubleshooting process.
– Explain how to evaluate recent maintenance history.
– List typical symptoms of common hydraulic system problems.
– Explain how to determine the cause of and provide a solution to a problem.
– Explain how a portable tester works.
– Describe how to keep and use troubleshooting charts.

Lesson 8 - Troubleshooting Valves


Valve problems and test procedures; Disassembly, cleaning, and inspection; Repair and replacement; Solenoid problems; Reassembly and testing

Learning Objectives:
– Name five common valve problems and explain the sequence of steps to be followed in troubleshooting them.
– Describe the proper procedures for valve disassembly, cleaning, and inspection.
– Explain how to determine whether to repair or replace a malfunctioning valve.
– Describe the reasons for hydraulic "wire drawing."
– List the reasons for electrical and mechanical failures of solenoid valves.
– Explain the procedures for reassembling, reinstalling, and testing valves.

Lesson 9 - Troubleshooting Cylinders


Cylinder descriptions; Troubleshooting procedures; Cylinder testing, repair, and installation; Shock absorbers

Learning Objectives:
– Name the most common types of hydraulic cylinders and identify their major parts.
– List the symptoms of internal and external cylinder misalignment.
– Explain what to do if you find internal leakage in a cylinder.
– Name the cylinder components most frequently replaced.
– Explain the purpose of a piston rod boot.
– Describe the symptoms of shock absorber failure.

Lesson 10 - Troubleshooting Pumps and Motors


Gear and vane pump problems; Vane motors; Axial- and radial-piston pump problems; Pump and motor repair; Pump maintenance checks

Learning Objectives:
– List the proper procedures for troubleshooting pumps and motors.
– Name some common causes of pump failure.
– Describe typical causes of cavitation.
– Discuss the major sources of problems in gear pumps and vane pumps.
– Describe the effects of contaminants in axial-piston and radial-piston pumps.
– Explain the differences between a vane motor and a vane pump.