Application
This unit describes the performance outcomes required to return charging system alternators to original manufacturer tolerances and clearances. It involves preparing for the task, dismantling and evaluating the transmission, carrying out the overhaul process, reassembling and testing the transmission, and completing workplace processes and documentation.
It applies to those working in an automotive service and repair industry. The charging system alternators include those fitted to agricultural machinery, heavy commercial vehicles, light vehicles, marine vessels, mobile plant machinery, motorcycles 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 dismantle alternator | 1.1 Job requirements are determined from workplace instructions 1.2 Dismantling information is sourced and interpreted 1.3 Dismantling options are analysed and those most appropriate to the circumstances are selected 1.4 Hazards associated with the work are identified and risks are managed 1.5 Dismantling tools and equipment are selected and checked for serviceability |
2. Dismantle and evaluate alternator and components | 2.1 Alternator is dismantled in a logical sequence according to manufacturer and workplace procedures, and safety and environmental requirements, and without causing unnecessary damage to alternator 2.2 Alternator components are cleaned for evaluation according to workplace procedures and safety and environmental requirements 2.3 Components are measured and compared with manufacturer specifications and serviceability is determined 2.4 Component repair method is determined 2.5 Unserviceable parts are identified and replacement parts sourced |
3. Carry out overhaul | 3.1 Overhaul information is sourced and interpreted 3.2 Overhaul options are analysed and those most appropriate to the circumstances are selected 3.3 Overhaul tools and equipment are selected and checked for serviceability 3.4 Components are machined, repaired and replaced as required, and adjustments are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or systems |
4. Assemble alternator and components | 4.1 Alternator is assembled according to manufacturer specifications, workplace procedures, and safety and environmental requirements 4.2 Tolerances and clearances are measured against manufacturer specifications and necessary adjustments are made 4.3 Assembly of alternator is completed within workplace timeframes and without causing damage to other components or systems 4.4 Post-assembly testing is carried out according to workplace procedures and safety and environmental requirements, and any problems detected as having been introduced during the assembly process are rectified |
5. Complete work processes | 5.1 Final inspection is made to ensure work is to workplace expectations and alternator is presented ready for use or storage 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 any faulty electrical equipment is identified, tagged and isolated according to workplace procedures 5.4 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:
overhaul charging system alternators of two different vehicles, vessels or machinery, which include an alternator with a:
star connected stator
delta connected stator.
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 overhauling charging system alternators, including procedures for:
using specialised tools and equipment
using appropriate personal protective equipment (PPE)
identifying hazards and controlling risks associated with wearing jewellery while working around high current wiring systems
environmental requirements, including procedures:
found in safety data sheets (SDS) relating to toxic and corrosive substances
for disposing of replaced alternator components
types, characteristics and operating principles of charging system alternators, including alternators with both star and delta connected stators
charging system alternator overhaul procedures, including:
methods for cleaning and preparing charging system alternators for overhaul
charging system alternator dismantling procedures
charging system alternator repair and adjustment procedures, including:
brushes to slip ring alignment
bearings shimmed and seated in alternator housing
rotors rebalanced
rectifier installation to alternator housing
component assembly procedures, including procedures for measuring and calculating tolerances, and adjusting components
post-overhaul bench testing procedures, including:
use of load simulator load tester for complete system analysis
analysis of system operation while using gauges, current clamps, electrical test equipment, scan tools, oscilloscopes and other industry-relevant test equipment
post-overhaul testing procedures of alternator in vehicle, vessel or machinery, including:
accessing and interpreting diagnostic trouble codes (DTCs)
DTC clearing procedures
checking for electrical connector mating
checking for correct charging voltage at battery.
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 charging system alternators 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 specifications relating to charging system alternators
two different vehicles, vessels or machinery with star and delta connected stators and requiring overhaul
tools, equipment and materials appropriate for overhauling and adjusting a range of alternators.
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 sources of information for charging system alternators efficiently. |
Reading skills to: | interpret and assess information from manufacturer and workshop literature when seeking charging system alternator specifications and procedures. |
Writing skills to: | legibly and accurately fill out workplace documentation when reporting diagnostic findings, making repair recommendations, and recording parts and material used. |
Oral communication skills to: | clarify instructions, report evaluation findings and make overhaul recommendations. |
Numeracy skills to: | measure charging system alternator components and use basic mathematical operations, including addition and subtraction, to calculate tolerances and deviations from manufacturer specifications. |
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. |
Technology skills to: | use precision measuring equipment, such as vernier calipers and micrometers use specialised charging system alternator overhaul equipment. |
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: using specialised tools and equipment using appropriate personal protective equipment (PPE) identifying hazards and controlling risks associated with wearing jewellery while working around high current wiring systems environmental requirements, including procedures: found in safety data sheets (SDS) relating to toxic and corrosive substances for disposing of replaced alternator components. |
Sectors
Technical - Electrical and Electronic
Competency Field
Electrical