Diesel Motor Mechanic ANZSCO Code: 321212
If you’re interested in a career as a Diesel Motor Mechanic (Mobile Plant), this article will provide an overview of the occupation, assessment processes required skills, and the steps to apply for migration under ANZSCO Code 321212 Diesel Motor Mechanic (Mobile plant) maintain, test, and repair the mechanical components of mobile plant machinery, including drill rigs, loaders, excavators, graders, haul trucks, cranes, and compactors, as well as diesel engines. Diesel mechanics are specialized experts who inspect and fix automobiles and other machinery powered by diesel fuel.Large diesel vehicles like trucks, farm equipment and construction machinery can be difficult to keep running properly without extensive training or education.
Occupation description
Diesel Motor Mechanics working on mobile plant equipment are responsible for the maintenance, testing, and repair of mechanical components and diesel engines on heavy machinery – such as loaders, excavators, graders, cranes and compactors. Their duties may involve diagnosing mechanical and electrical issues as well as disassembling engines and components in order to replace worn parts before reassembling to ensure machinery runs smoothly. They may also perform routine maintenance tasks like oil changes and engine tune-ups while adhering to environmental and safety regulations.
Their job involves:
Identification and correction of mechanical and electrical issues.
Inspection and removal of parts such as steering mechanisms, engine assemblies, transmissions and other components.
Assemble mechanical parts, replace worn-out or damaged pieces as necessary, and consult service manuals as required.
Implement planned maintenance procedures such as engine tune-ups, lubrications, and oil changes to comply with pollution standards and provide smoother car operation.
Reassembling engines and other parts after repairs.
Mechanical parts that have been repaired and adjusted to ensure optimal operation.
Computers provide invaluable assistance in testing and diagnosing parts.
Note: Motor mechanics who operate mobile plant equipment for auto retail, service and repair fall under this category. However, forklift operators mechanics, large commercial vehicles, agricultural equipment mechanics as well as specialists for air conditioning systems, brakes systems or smaller engines do not fall into this classification.
How will I be assessed?
The skills assessment process for this occupation involves two main stages:
Stage 1: Documentary Evidence Assessment
In this stage, applicants must provide documentation proving they meet the qualifications and work experience requirements. Candidates with formal credentials generally require at least three years of relevant work experience while those without formal training require five. Documents required at this stage include employment references, wage slips and bank statements.
Below is information regarding the documentation, training, and employment requirements:
Download the Evidence Guide to learn what evidence to submit with your application.
If you are on Pathway 1, it is also necessary to gather information regarding assessments for your occupation.
An introduction to videos and photos.
Report from the Supervisor.
Referring to the Pathway 1 Employment Experience Guidelines can provide more details regarding employment experience criteria that is acceptable for a Pathway 1 application.
Please refer to the Pathway 2 Candidate Guide before enrolling for a Pathway 2 examination.
Stage 2: Technical Assessment
If their documentary evidence is accepted, applicants will proceed with a technical assessment, usually comprising an interview. At this interview, applicants are asked questions relevant to their trade in order to demonstrate their skills and knowledge; this assessment ensures their abilities meet Australian standards.
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What skills and knowledge do I need?
AUR31220 Certificate III in Mobile Plant Technology is essential to this position. In order to earn this certification, you will need to demonstrate proficiency in several competency units which cover specific aspects of Australian businesses and knowledge acquisition and skills development.
You must achieve 36 units of competency:
9 core units
27 elective units
Core Units
Code | Title |
AURAEA002 | Implement and follow environmental and sustainability best practices at an automotive workplace. |
AURASA102 | Follow safe working practices when working at an automotive workplace |
AURETR112 | Test and repair basic electrical circuits |
AURETR125 | Test, charge, and replace batteries on vehicles to increase vehicle jump-starting capabilities. |
AURTTA104 | Carry out servicing operations |
AURTTA118 | Develop and Implement Diagnostic Test Strategies |
AURTTK102 | Maintain tools and equipment used in an automotive workplace |
AURTTA105 | Select and utilize bearings, seals, gaskets, sealants and adhesives |
AURTTA006 | Inspect and service hydraulic systems |
Elective Units
Code | Title |
AURAFA002 | Read and respond to automotive workplace information |
AURAFA103 | Effective communication in an automotive workplace |
AURTTF102 | Inspect and service diesel fuel injection systems |
AURTTK001 | Utilize and maintain measuring equipment in an automotive workplace |
AURETR014 | Inspect, test and service starting systems |
AURETR129 | Diagnose and repair charging systems |
AURETR130 | Diagnose and repair starting systems |
AURTTB101 | Inspect and service braking systems |
AURTTC103 | Diagnose and repair cooling systems |
AURTTD002 | Inspect and service steering systems |
AURTTD004 | Inspect and service suspension systems |
AURTTE104 | Inspect and service engines |
AURTTQ001 | Inspect and service final drive assemblies |
AURHTQ103 | Diagnose and repair heavy vehicle drive shafts |
AURTTX104 | Inspect and service hydrostatic transmissions |
AURTTX106 | Diagnose and repair hydrostatic transmissions |
AURETR124 | Correct and repair compression ignition engine management systems |
AURHTE102 | Scan and repair heavy vehicle compression ignition engines |
AURTTF105 | Diagnose and repair engine forced-induction systems |
AURTTC001 | Inspect and service cooling systems |
AURHTF102 | Investigate and repair heavy vehicle diesel fuel injection systems |
AURKTA005 | Inspection, service and repairs on track-type drives and support systems |
AURKTA111 | Diagnose and repair mobile plant hydraulic systems |
AURKTB101 | Diagnose and repair mobile plant braking systems |
AURKTD102 | Diagnose and repair mobile plant steering systems |
AURKTQ101 | Mobile plant final drive assemblies need to be diagnosed and repaired for proper functioning. |
AURKTX101 | Diagnose and repair powershift transmissions |
All compulsory and elective competency units must be successfully completed to achieve full competence certification. All prerequisite units, core and elective competencies must be demonstrated by you.
NOTE: The presence of prerequisites within an object.

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Step 1
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Step 2
Recognize the Evaluation Procedure
Step 3
Check what proof may be required of you.
Step 4
Find out how much your trade skills assessment will cost upfront.
Step 5
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