High speed swing
Firstly, with the increase of the vehicle speed, the shimmy becomes stronger. Secondly, the shimmy occurs at a higher vehicle speed and causes the steering wheel to shake. You can first set up the drive axle, plug the safety plug on the front wheel, start the engine and gradually shift into the high gear to make the drive wheel reach the final test shimmy speed. If the body and steering wheel shake at this time, it is the vibration caused by the transmission system. Because the front axle of the front wheel is at a standstill at this time, if the final test shimmy speed is reached and the vehicle does not shake, the reason for the shimmy is that there is a fault in the front axle of the vehicle; Check whether each positioning angle and toe in of the front wheel meet the requirements, and adjust it in case of misalignment; Put up the front axle and test run the wheel to check the dynamic balance of the wheel and whether the tire is deformed too much. If necessary, replace good wheels for comparative test; Check whether the front axle and frame are deformed and whether the transmission shaft is bent. If possible, make dynamic balance of the transmission shaft.
Heavy steering
There are many reasons for heavy steering, but there are usually the following points:
1、 Insufficient tire pressure, especially the front wheel pressure, makes steering difficult.
2、 Power steering fluid is insufficient, so it is necessary to add power steering fluid.
3、 If the front wheel alignment is inaccurate, the four-wheel alignment test shall be carried out.
Deviation during driving
Check the deviation. Generally, when driving, straighten the steering wheel, and then release the steering wheel to see if the car is in a straight line. If you don't go in a straight line, you'll deviate.
First of all, the deviation may be caused by the inconsistent pressure of the left and right tires. It is necessary to inflate the insufficient tires.
Secondly, the front wheel alignment may be inaccurate. Front wheel camber, kingpin angle or kingpin internal angle are different. Too small toe in or negative toe in will cause deviation. You must go to a professional maintenance station for inspection.
Post time: Oct-28-2021