This makes sure that they operate safely, prevent wear and tear to parts, and reduce expensive breakdowns. They also figure out the causes of equipment problems and make the necessary adjustments or repairs. Often, they repair broken parts or install replacement parts. In larger shops, they may specialize in one area. They may work only with electrical systems, transmissions, brakes, or engines.
Some mechanics also work on diesel-powered automobiles.
Others work on a variety of other diesel-powered equipment. This equipment includes electric generators and compressors and pumps used in irrigation systems and oil well drilling. Most diesel mechanics work on heavy trucks used in industries. This includes mining and construction, and private and commercial trucking lines. Mechanics who work for organizations that maintain their own vehicles may spend much time doing preventive maintenance.