Qingling FVZ34V truck 50, the model assembly of Japan's five bell 6HKI-TC engine, engine fuel by the cylinder of the single pump supply, and the single body pump controlled by electronic control unit, is a relatively advanced model in China. This part of the model of our company has been used for 3 to 10 years. It is mainly one of the main models of oil field transportation and transportation. In general, the vehicle condition is good and the failure rate is low, but in the actual maintenance work, the maintenance technicians find that the brake gas road of this type is easier than the other models. The main performance is the retardation of braking reaction and the weakness of braking, especially in winter, the number of failures is obviously increased.