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Elements and Performance Criteria

  1. Prepare to diagnose and repair cooling system
  2. Diagnose cooling system
  3. Repair cooling system
  4. Complete work processes
  5. Prepare to diagnose and repair cooling system
  6. Diagnose cooling system
  7. Repair cooling system
  8. Complete work processes

Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Safety and environmental requirements must include:

work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for handling hot pressurised cooling systems

environmental requirements, including procedures for trapping, storing and disposing of fluids released from cooling systems.


Performance Evidence

Before competency can be determined, individuals must demonstrate they can perform the following according to the standards defined in this unit’s elements, performance criteria, range of conditions and foundation skills:

diagnose and repair a fault in two different cooling systems, in which the work must involve:

removing and refitting or replacing all of the following components:

radiator

water pump

engine core plugs

removing and refitting or replacing two of the following components:

thermostat

radiator hoses and heater hoses

heater core

heater valve

heat exchanger

engine fan system.


Knowledge Evidence

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) requirements relating to diagnosing and repairing cooling systems, including procedures for handling hot pressurised cooling systems

environmental requirements, including procedures for trapping, storing and disposing of fluids released from cooling systems

operating principles of cooling systems and associated components, including:

effects of heat, including changes of temperature, colour, state and volume of substances

heat transfer, including conduction, convection and radiation

air cooled systems

liquid cooled systems

application, purpose and operation of the following components of cooling systems and components, including:

engine coolant types and composition

water pumps

thermostats and bypass systems

mechanical, hydraulic, pneumatic and electric cooling fan systems

radiators and radiator caps

heat exchangers

expansion tanks

hoses

drive belts

temperature sensors and gauges

diagnostic testing procedures for cooling systems, including testing procedures for:

effects of corrosion, cavitation and electrolysis

transient voltage

engine coolant

cooling system pressure

combustion leak

cooling fan system

thermostat

infra-red thermal devices

cooling system hose

water pump

repair procedures for cooling systems, including procedures for bleeding coolant systems

post-repair testing procedures for cooling systems, including:

fan system operation

thermostat operation.