What causes the truck to sway left and right and lose steering control?
2 Answers
Truck swaying left and right and losing steering control can be caused by the following reasons: 1. Engine operation instability leading to body vibration: When the piston is in the working stroke and fuel is burning, the combustible gas pressure suddenly increases from 10-20kg/cm2 to 70-80kg/cm2. The powerful explosive pressure pushes the piston downward, transmitting power to the crankshaft through the connecting rod, causing it to rotate. The crankshaft then transmits power to the wheels through the transmission system, propelling the vehicle forward. 2. Drive shaft causing body shaking: Improper assembly of the drive shaft. 3. Wheels causing steering wheel vibration: This refers to the steering transmission system, including the steering wheel, experiencing vibration.
I've been driving trucks for over a decade and have encountered steering instability several times. The last incident happened during a long haul on the highway when the vehicle suddenly started swaying side to side, which scared me into pulling over immediately. Later at the repair shop, it was discovered that severe wear on the front wheel bearings caused unbalanced wheel rotation. The mechanic also mentioned that uneven tire pressure could trigger such vibrations. Frequent overloading can lead to excessive stress on the frame and deformation of suspension springs, making the steering wheel harder to control. I must remind everyone not to underestimate these issues—if you notice your vehicle swaying, stop immediately to inspect the tires and chassis. Regular maintenance of components like bearings and shock absorbers can prevent many troubles. In short, safety comes first; don't risk major consequences to save a little time.
