Diesel Motor Mechanic

Maintains, tests and repairs diesel motors and the mechanical parts of trucks, buses and other heavy vehicles such as transmissions, suspension, steering and brakes. Registration or licensing may be required.
Training time 1 year
Average pay $83,560
Employment prospects Strong
Employment size 2,900

What does a Diesel Motor Mechanic do?

  • detecting and diagnosing faults in engines and parts
  • dismantling and removing engine assemblies, transmissions, steering mechanisms and other components, and checking parts
  • repairing and replacing worn and defective parts and reassembling mechanical components, and referring to service manuals as needed
  • performing scheduled maintenance services, such as oil changes, lubrications and engine tune-ups, to achieve smoother running of vehicles and ensure compliance with pollution regulations
  • reassembling engines and parts after being repaired
  • testing and adjusting mechanical parts after being repaired for proper performance
  • diagnosing and testing parts with the assistance of computers


  • Automotive Heavy Mechanic

Related courses

Government-subsidised training is marked with this symbol
Certificate III in Heavy Commercial Trailer Technology
Certificate III in Motor Sport Technology
Certificate IV in Motor Sport Technology
Certificate III in Automotive Diesel Engine Technology