Check and adjustment of angles of installation of wheels are necessary for ensuring good stability and controllability of the car, and also uniform wear of tires at operation. Check and adjustment of angles of installation of wheels are carried out at special stands according to instructions for their operation.

Discrepancy of the valid values measured on the car to the control values provided below is caused by wear and deformation of details of a suspension bracket or deformation of a body.

Prevention Replacement or repair of details of a suspension bracket can cause change of angles of installation of wheels therefore check of angles of installation of wheels is obligatory.

The angles of installation of forward wheels of the car are given in tab. 4.3.

After installation of the car on the stand (just before check of corners) you "prozhmit" a car suspension bracket, putting two-three times the effort of 392-490 N (40–50 kgfs) directed from top to down to a front bumper. Wheels of the car have to be located parallel to a longitudinal axis of the car.

During the checking and adjustment of angles of installation of forward wheels at first check a corner of a longitudinal inclination of an axis of turn, then a corner of disorder of wheels and in the last turn a convergence of wheels.

The corner of a longitudinal inclination of an axis of turn of a forward wheel is formed by the vertical and the line passing through the middle of the top support of a telescopic rack and the center of the sphere of the spherical support fixed on the lower lever. Adjustment of a corner of a longitudinal inclination of an axis of turn is not provided by a car design. At a corner deviation from nominal rate replace the damaged and deformed details.

The corner of disorder of forward wheels is characterized by a deviation of the average plane of rotation of a wheel from a vertical. Adjustment of a corner of disorder of forward wheels is not provided by a car design.

The convergence of forward wheels represents a corner between the plane of rotation of a wheel and a longitudinal axis of the car. The convergence of forward wheels is regulated change of length of steering drafts.