The car drive shaft is not balanced, can affect the driving safety. If there is a fault of transmission shaft imbalance, the following methods can be used to determine:

The front wheel with the pad plug, with a jack up the car side of the middle and rear drive axle; Start the engine, put it in high gear, and check the shimmy of the drive shaft. During inspection, notice that when the speed drops, if the shimmy increases significantly, it indicates that the shaft is bent or the flange is skewed.

Drive shaft bending is shaft tube bending, most of which is caused by car overload. Coal transport vehicles due to overload, overhang, shaft bending, fracture of the fault occurred more. If some cars plus trailers pull more than 60 tons of coal, the drive shaft due to overload, overhang serious damage. Although the middle support of the drive shaft has been strengthened and the strength of the flange fork has been strengthened, the fault of fracture and damage still appears.

Replace the drive shaft parts, after straightening, balance check should be carried out, unbalance should meet the standard requirements. The technical condition of the universal joint fork and the transmission shaft hanger should also be checked in detail. If the installation is not satisfactory, the cross shaft and roller damage will cause loose and vibration, and the transmission shaft will be out of balance.