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Don't start driving immediately after the car is repaired. You need to check the car repaired to see if there is a need for rework. Check the vehicle on the flat pavement and check it in the following order: 1, observe the vehicle appearance, stand in front of the car and look at the cab, engine hood, left and right leaf board, front bumper, etc. If it is not normal, there are usually the following factors: the left and right tire pressure is inconsistent, the left and right springs and shock absorbers, the deformation of the frame or leaf plate, etc. 2, check the bumper and the hook before the car is strong, radiator shield, engine hood, leaf board and cab have a concave and convex cracks, the connection bolts are firm, the front lamp installation is firm. 3. Enter the cab to check whether the door switch is light, whether the door and window glass is flexible or not, whether the foot pedal is firmly installed, and whether the windshield is cracked before inspection. 4, after the car to observe whether the car is straight, whether the rear lights, brake lights, license plates and so on are firmly installed. 5. Check the installation of oil tank and spare tire. The purpose of driving inspection is to look at the comprehensive performance of the whole parts of the whole vehicle. The operation should be careful and safe. The items and the order are as follows: 1. Before starting, the engine should reach the normal temperature and check the working condition of the instrument. 2. Check the clutch. The clutch should be completely separated, stable and reliable, without trembling and abnormal noise. 3, low speed 2 to 3 kilometers, so that all parts of the chassis temperature rise to normal, pay attention to whether the components have abnormal noise. Step on the brake pedal, test the brakes flexibly and effectively, and then increase the speed. The direction system should be flexible and flexible and have no running deviation. 4, choose the right place, check the minimum steering radius of the car, the steering radius must comply with the original vehicle requirements. 5. In acceleration or deceleration, be aware of the sound of a fine hearing gearbox, clutch, drive shaft, and differential, allowing gears to have different sounding sounds at different gears and different speeds, but never allow the sound of knocking; in any one of the gears, when the speed is suddenly changed, the gear is allowed to have instantaneous knocking; transmission No sound can be made when the shaft is running normally.