AURMTF001
Analyse and repair performance carburetted fuel systems


Application

This unit describes the performance outcomes required to analyse and repair carburetted fuel systems and associated components. It involves identifying, evaluating, selecting, justifying and documenting the most appropriate rectification method or variation to the rectification method. It involves developing and modifying performance improvement strategies in carburetted fuel systems and associated components. The unit includes the analysis of multi-system and intermittent faults which may be caused by operating in adverse conditions.

It applies to those working in the motor sport industry.

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. Identify and confirm effects of fault in carburetted fuel system

1.1 Objective of analysis and evaluation is determined from workplace instructions

1.2 Specifications for carburetted fuel system are accessed and interpreted

1.3 Details of fault are examined and available preliminary information is documented

1.4 Effects of fault are identified and confirmed from direct and indirect evidence

1.5 Hazards associated with the work are identified and risks are managed according to safety and environmental requirements

2. Prepare for fault analysis

2.1 Evaluative criteria are developed or adopted to meet the objective of analysis and evaluation

2.2 Analytical and evaluative methodology are developed or identified from technical information

2.3 Testing equipment is prepared according to manufacturer and workplace procedures

2.4 Tools and materials required to support diagnostic procedure are selected and checked for serviceability

2.5 Possible causes of fault are identified from analysis of technical support information and available on-board diagnostic systems

3. Carry out analysis and determine repair and performance enhancement strategies

3.1 Selected analytical and evaluative methodology is followed according to manufacturer and workplace procedures

3.2 Tests are carried out according to manufacturer and workplace procedures, and safety and environmental requirements

3.3 Analytical and other diagnostic findings are verified, as required, by using reliable alternative or optional processes

3.4 Analytical findings and results are assessed against evaluative criteria

3.5 Valid conclusions are drawn from available evidence and documented according to workplace requirements

3.6 Options for responding to analysis and evaluation objective are determined from further research of technical support information

3.7 Repair or modification method is selected and documented

4. Conduct repairs and implement performance improvement strategies

4.1 Repair tools and materials are selected and prepared

4.2 Repairs and component replacements and adjustments are carried out according to manufacturer specifications, team requirements, and safety and environmental requirements, and without causing damage to other components or systems

4.3 Post-repair testing and vehicle start-up are carried out to ensure performance and operation are to team requirements

5. Complete work processes

5.1 Tools and equipment are cleaned, maintained and prepared for future use, and stored according to manufacturer specifications and team requirements

5.2 Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected

5.3 Tools and equipment are checked and stored and problems reported to appropriate personnel according to team requirements

5.4 Workplace documentation is processed according to team requirements

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:

analyse and repair faults in the performance of the carburetted fuel systems of two different competition vehicles, including:

two of the following faults:

rough running

under or over fuelling

contamination or leaks

one of the following faults:

fuel cells venting

fuel pump pressure and/or flow regulation

conduct post-repair checks on the above fuel systems.


Evidence of Knowledge

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) and environmental requirements relating to analysing and repairing performance carburetted fuel systems, including procedures for working with petrol fuel systems

environmental requirements, including procedures for trapping, storing and disposing of petrol fuel released during repairs or testing

types, function, operation and limitations of carburetted fuel systems and components, including:

properties of fuels used in the motor sport industry, including compatibility with carburetted fuel system components

fuel system components, including:

rollover valves

fuel cells

fuel lines

breathers

pickup pumps

main pumps

filters

fuel pots, surge tanks and collector tanks

pressure and temperature sensors

multi-barrel carburettors, including:

two-barrel and four-barrel carburettors

two-stage carburettors, including vacuum and mechanical control of second stage

diagnostic testing procedures of performance carburetted fuel systems, including:

fuel pump pressure, volume and vacuum testing

testing for air leaks

cold-start enrichment testing

exhaust gas analysis

procedures for repair and improvement of performance carburetted fuel systems, including:

fuel pump installation

carburettor dismantling, cleaning, repair and reassembly

carburettor removal, replacement and adjustment

post-repair testing procedures of performance carburetted fuel systems.


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 complex performance carburetted fuel systems they have analysed and repaired, e.g. work order.

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 specifications for vehicle performance carburetted fuel systems

two different competition vehicles with faults in their performance carburetted fuel systems

diagnostic equipment for performance carburetted fuel systems, including exhaust gas analyser

repair tools, equipment and materials appropriate for analysing and repairing performance carburetted fuel 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 controlling body rules, category rules and supplementary regulations

interpret information from manufacturer and workshop literature when seeking carburetted fuel system specifications and procedures.

Writing skills to:

legibly and accurately fill out workplace documentation when reporting analysis findings.

Numeracy skills to:

measure system components and use basic mathematical operations, including addition and subtraction, to calculate distances, tolerances and deviations from manufacturer specifications

interpret units of measurement of pressure and flow.

Planning and organising skills to:

plan own work requirements and prioritise and sequence actions to achieve required outcomes and ensure tasks are completed within workplace timeframes.

Self-management skills to:

work efficiently with minimum supervision.

Technology skills to:

use precision measuring equipment, such as micrometers, vernier calipers, fuel pressure and flow rate gauges

use specialised fuel system diagnostic equipment, such as scan tools and data loggers.


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 petrol fuel systems

environmental requirements, including procedures for trapping, storing and disposing of petrol fuel released during repairs or testing.

Analytical and evaluative methodology must include:

diagnostic process

sequence of process

tests

testing equipment.

Repair or modification method must suit:

operating conditions

controlling body rules, category rules and supplementary regulations

financial implications.


Sectors

Technical – Fuel Systems


Competency Field

Motor Sport