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Elements and Performance Criteria

  1. Prepare to diagnose and repair light vehicle hydraulic braking system
  2. Diagnose braking system
  3. Repair braking system
  4. Complete work processes
  5. Prepare to diagnose and repair light vehicle hydraulic braking system
  6. Diagnose braking system
  7. Repair braking 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:

lifting and supporting light vehicles

handling and controlling brake dust and brake fluids

environmental requirements, including procedures for trapping, storing and disposing of brake dust and brake fluid released from hydraulic braking 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 light vehicle four-wheel disc hydraulic braking systems, in which the work must involve removing and refitting or replacing the brake calipers, disc pads and disc rotors

one light vehicle drum braking system, in which the work must involve removing and refitting or replacing brake drums, brake shoes and wheel cylinders

one light vehicle brake master cylinder, in which the work must involve removing and refitting or replacing the brake master cylinder.


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 light vehicle hydraulic braking systems, including procedures for:

lifting and supporting light vehicles

handling and controlling brake dust and brake fluids

environmental requirements, including procedures for trapping, storing and disposing of brake dust and brake fluid released from hydraulic braking systems

operating principles of light vehicle hydraulic braking systems and associated components, including:

levers

friction

hydraulics, including the relationship between force, pressure and area

properties of brake fluids, including:

Department of Transportation (DOT) classification

synthetic and non-synthetic

compatibility of fluid types

application, purpose and operation of light vehicle hydraulic braking systems and components, including:

front and rear split systems

diagonal split systems

master cylinders, including:

tandem master cylinders

compensating-type master cylinders

centre-valve master cylinders

drum braking system and components, including:

self-energising or servo effect

leading and trailing shoe braking systems

duo-servo braking systems

two-leading shoe braking systems

wheel cylinders

manual and self-adjustment systems of drum braking systems

disc braking systems and components, including:

types of brake discs

disc pads

self-adjustment of disc pads

fixed, floating and dual-piston brake calipers

parking brake systems and components, including:

parking brake levers

drum parking brakes

disc parking brakes

electronic parking brake systems

braking system valves and switches, including:

pressure differential valves and switches

proportioning valves

load-sensing proportioning valves

drum brake check valves

fluid-level warning devices

vacuum operated brake boosting systems

diagnostic testing procedures for light vehicle hydraulic braking systems, including procedures for:

checking brake pedal

operational tests of brake booster

operational tests of master cylinder

testing brake fluid

operational tests of hand brake

operational tests of drum and disc brakes

measuring and evaluating brake drums, shoes, discs and pads

repair procedures for light vehicle hydraulic braking systems, including procedures for:

removing, replacing and adjusting hydraulic system components, including master cylinder, proportioning valves, switches, brake hoses and lines, disc calipers and wheel cylinders

removing, replacing and adjusting braking system components, including brake booster, master cylinder, hand brake lever and cables, brake shoes and drums, brake pads and brake discs

bleeding brakes, including anti-lock braking systems (ABS)

post-repair testing procedures for light vehicle hydraulic braking systems, including procedures for road testing and bedding in brakes.