Application
This unit describes the performance outcomes required to inspect and service diesel fuel injection systems. It involves preparing for the task, inspecting the fuel injection system for leaks, inspecting the air filter, reporting the inspection findings, servicing and adjusting the system, and completing workplace processes and documentation.
It applies to those working in the automotive service and repair industry. The diesel fuel injection systems include those of agricultural machinery, heavy commercial vehicles, light vehicles, marine vessels, motorcycles, mobile plant or outdoor power equipment.
No licensing, legislative, regulatory or certification requirements apply to this unit at the time of publication.
Elements and Performance Criteria
Elements Elements describe the essential outcomes. | Performance Criteria Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold and italicised text is used, further information is detailed in the range of conditions section. |
1. Prepare to inspect and service diesel fuel injection system | 1.1 Job requirements are determined from workplace instructions 1.2 Servicing information is sourced and interpreted 1.3 Hazards associated with the work are identified and risks are managed 1.4 Tools, equipment and materials are selected and checked for serviceability |
2. Inspect diesel fuel injection system | 2.1 Inspection is carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements 2.2 Inspection results are compared with manufacturer specifications 2.3 Inspection findings are reported according to workplace procedures, including recommendations for necessary repairs or adjustments |
3. Service diesel fuel injection system | 3.1 Service and adjustments are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or systems 3.2 Post-service testing is carried out according to workplace procedures, including engine start-up check for leaks and operation |
4. Complete work processes | 4.1 Final inspection is made to ensure work is to workplace expectations and vehicle or machinery is presented ready for use 4.2 Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected 4.3 Tools and equipment are checked and stored according to workplace procedures 4.4 Workplace documentation is processed according to workplace procedures |
Evidence of Performance
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:
inspect and service a diesel fuel injection system on two different vehicles or machinery.
Evidence of Knowledge
Individuals must be able to demonstrate knowledge of:
work health and safety (WHS) and occupational health and safety (OHS) requirements relating to inspecting and servicing diesel fuel injection systems, including procedures for:
working with high pressure diesel fuel systems
working with high voltage diesel fuel injectors
working with stored fuel pressures
engine start-up and shut-down
environmental requirements, including procedures for trapping, storing and disposing of fluids released from fuel systems
application, purpose and operation of air filter and air intake housing and ducting
identification and function of mechanically controlled diesel fuel injection system and components, including:
types and applications of fuels, including diesel and biofuels
fuel tank and lines
fuel filters and sedimenter filters
fuel supply pumps
injection pumps, including:
in-line
rotary
injector pipes
injectors
overflow or leak-off pipes
identification and function of electronic diesel fuel injection systems and common rail fuel systems and components, including:
fuel tank and lines
fuel filters and sedimenter filter
fuel supply pumps
injection pumps
pressure and injector pipes
fuel rail
injectors
overflow or leak-off pipes
electronic control unit and sensors
inspection procedures for diesel fuel injection systems, including procedures relating to leaks, damaged piping and sedimentary sight glasses
service and adjustment procedures for diesel fuel injection systems, including:
servicing sedimenter filter
replacing fuel filter
bleeding fuel system as required
servicing air filter and air intake housing and ducting
engine speed adjustments as required and operational testing
post-service testing procedures for diesel fuel injection system.
Assessment Conditions
Assessors must satisfy NVR/AQTF assessor requirements.
Competency is to be assessed in the workplace or a simulated environment that accurately reflects performance in a real workplace setting.
Assessment must include direct observation of tasks.
Where assessment of competency includes third-party evidence, individuals must provide evidence that links them to the diesel fuel injection systems that they have worked on, e.g. repair orders.
Assessors must verify performance evidence through questioning on skills and knowledge to ensure correct interpretation and application.
The following resources must be made available:
automotive repair workplace or simulated workplace
workplace instructions
manufacturer diesel fuel injection system specifications
two different vehicles or machinery with diesel fuel injection systems requiring servicing
tools, equipment and materials appropriate for inspecting and servicing diesel fuel injection systems.
Foundation Skills
This section describes those language, literacy, numeracy and employment skills that are essential to performance and are not explicit in the performance criteria.
Skills | Description |
Learning skills to: | locate appropriate sources of information efficiently. |
Reading skills to: | interpret information from manufacturer and workshop literature when seeking service procedures and specifications relating to diesel fuel injection systems. |
Writing skills to: | legibly and accurately fill out workplace documentation when reporting inspection findings, making recommendations, and recording parts and material used. |
Oral communication skills to: | clarify instructions report inspection findings and make repair recommendations. |
Numeracy skills to: | calculate liquid volumes and service schedule intervals using basic mathematical operations, including addition and subtraction. |
Problem solving skills to: | refer problems outside area of responsibility to appropriate person. |
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: working with high pressure diesel fuel systems working with high voltage diesel fuel injectors working with stored fuel pressures engine start-up and shut-down environmental requirements, including procedures for trapping, storing and disposing of fluids released from fuel systems. |
Service must include: | replacing fuel filters servicing sedimenter filters bleeding fuel systems as required servicing air filters. |
Sectors
Technical – Fuel Systems
Competency Field
Mechanical Miscellaneous