DOT Entry Level Driver Training – Vehicle Systems and Reporting Malfunctions: Identification and Diagnosis of Malfunctions

A large diesel truck is much like a human body. It relies on multiple systems, small and large, to perform many different functions in order to convert the chemical energy in its fuel (diesel) into the energy needed to move the vehicle and its load. The vehicle must also keep the driver and passengers safe and comfortable, deal with noise and gas emissions that can be harmful to the environment, and last for many miles and years in order to be cost effective. Just like the human body, a diesel truck requires daily checks, routine maintenance, and occasional repairs. During daily and annual inspections, you are required to examine specific parts and accessories. Truck manufacturers create maintenance schedules identifying when fluids and parts need to be examined and/or replaced. How were the inspection and maintenance items chosen and why are they important? This course discusses the purpose and operation of the major systems of a combination vehicle, including the engine, exhaust, brakes, drive train, coupling, steering, and suspension systems. It provides a detailed description of each system, explains its importance to safe and efficient operation, and describes what is needed to keep it in good operating condition. It also covers common malfunctions and how to avoid them.