Common fault direction deviation

The performance of steering deviation is as follows: when you feel that the car automatically deviates to one side during driving, you must hold the steering wheel hard in order to maintain a straight driving direction. The reasons are: the left and right tire pressures are different; Individual brake shoes scratch the brake hub, or the wheel housing bearing of one wheel is too tight; Individual leaf springs are broken, and the elastic force of steel plates on both sides is uneven; Bending of front axle or frame; Misalignment of front wheel alignment or unequal wheelbase on both sides; The clearance between the steering knuckle kingpin and the bushing is different on the left and right, or the tightness adjustment of the ball joints on both sides of the tie rod is different; Uneven loading of goods in trucks.