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Industries & Professions /
Most diesel mechanics work on the engines of heavy trucks, such as those used in hauling freight over long distances, or in heavy industries such as construction and mining. Many are employed by companies that maintain their own fleet of vehicles. The diesel mechanic's main task is preventive maintenance to avoid breakdowns, but they also make engine repairs when necessary. Diesel mechanics also frequently perform maintenance on other nonengine components, such as brake systems, electronics, transmissions, and suspensions.