Fluid Power Journal

Outline of the soon-to-be-released upgraded mobile hydraulic mechanic study manual

Job responsibility 1.0: Understand hydraulic components and their operation.

  • Understand hydraulic symbols.
  • Understand the function and operation of system components.
  • Understand component model code breakdown.

Job Responsibility 2.0: Understand Loads and Motion.

  • Understand the units and terminology.
  • Understand force, pressure, area, and flow relationships.
  • Using Pascal’s Law.
  • Using flow and area relationships.

Job Responsibility 3.0: Maintain and repair Hydraulic Systems.

  • Understand commissioning a hydraulic system.
  • Understand component installation.
  • Hydraulic pumps.
  • Coupling types.
  • Hydraulic valves.
  • Hydraulic cylinders.
  • Hydraulic motors.
  • Gas-charged hydraulic accumulators.
  • Fluid conductors.
  • System fluid.
  • Fluid cleanliness.
  • Understand proactive (scheduled) maintenance (PM).

Job Responsibility 4.0: Troubleshoot Hydraulic Systems.

  • Understanding troubleshooting.
  • Component testing.
  • Accumulators.
  • Contamination control.
  • Hose assemblies.

Job Responsibility 5.0: ElectroHydraulic Control Systems.

  • Electrohydraulic valves.
  • Sensors.
  • Basic control theory.

Job Performance Stations (Hands-on)

Station # 1 Identify Fluid Power Symbols:

Identify 20 components by their symbolic representation on a schematic drawing. The schematic at this station will be either Mobile Hydraulic, Industrial Hydraulic, or Pneumatic depending upon your test. You will be required to give a written explanation for each component. This is not a multiple-choice station.

Station # 2 Identify Fasteners and Fittings:

This station has ten (10) fasteners and ten (10) fittings that require identification as to type, size, length, thread, and grade. Each item has five (5) multiple choice answers from which to choose.

Station # 3 Use of Multimeter:

This station is for testing the candidate in the use of a Multimeter.  There are 14 questions for readings taken on a test circuit board.  It is not multiple choice. The readings are for voltage, amperage, and resistance.

Station # 4 Measure a Pump Piston and Spool:

This station tests your ability to take measurements of a part that range from 1/16” to .0001” and requires using scales, calipers, and micrometers. A pump piston and a hydraulic valve spool are used for the measurements. This is not a multiple-choice station.

Station # 5 Fluid Conductors:

Requires identifying size, type, and pressure ratings of two (2) steel tubes, two (2) rubber hoses, one (1) copper, and one (1) nylon tube. Dial calipers and datasheets are provided to aid in this task. This station is not multiple choice.

Station # 6 Tube Bend and Flare:

Bend and flare a tube assembly to fit a fixture testing the skills of measuring, cutting, flaring, and assembly for compound bending to fit a fixture. All tubing, tools, and datasheets are provided.

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