While a diesel mechanic has basic computer skills, a diesel technician must have in-depth knowledge of technical programs so they can work on the electrical systems in diesel equipment.

Heavy diesel mechanics specialise in working with heavy vehicles and machinery, such as busses, trucks, trailers, and earthmoving and mining machinery; and have more experience and expertise to deal with these vehicles than a regular mechanic.

Examine and adjust protective guards, loose bolts, and specified safety devices. Perform routine maintenance such as changing oil, checking batteries, and lubricating equipment and machinery. Test drive trucks and buses to diagnose malfunctions or to ensure that they are working properly.

A diesel mechanic is a professional that specialises in the repair and maintenance of diesel-powered vehicles and appliances. They might spend most of their days evaluating automobiles, finding issues and fixing them as necessary.