Repair and service Mercedes Benz M - the Class W163 - Corners of installation of wheels of the car - the general information//since 1997 of release / mehanicm.ru

Mercedes M-Class W163

since 1997 of release

Repair and car operation



Mercedes W163
+ Mercedes-Benz Cars of a class M (W163)
+ Governing bodies and receptions of safe operation
+ Current leaving and service
+ Engine
+ Systems of cooling, heating and air conditioner
+ the Power supply system and production of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ Avtomaticheckaya transmission
+ Transmission line
+ Brake and auxiliary systems
- Suspension bracket and steering
   + Forward suspension bracket
   + Back suspension bracket
   + Steering
   - Suspension bracket geometry
      Check of geometrical parameters of the unit of bridges
      Check and adjustment of height of road gleams
      Corners of installation of wheels of the car - the general information
      Check and adjustment of disorder and выбега
      Check and convergence adjustment
      Check of size of a divergence of forward wheels in turn
+ Body
+ Onboard electric equipment



Corners of installation of wheels of the car - the general information

Corners of installation of wheels considerably influence stability of the car, wear of tires and fuel consumption. Nominal rates of corners are specified in Specifications.

The tilt angle of the plane of a wheel concerning a vertical is called as disorder. If wheels are inclined by the upper edges outside, disorder is called as positive, and on the contrary. The size of disorder is measured in degrees. Correctness of adjustment of disorder defines size and the provision of a spot of contact of protectors with a paving and allows to compensate changes in geometry the suspension brackets occurring during commission of turns and at movement of the car on a rough paving.

The data size to each other forward edges of wheels of the car is called as convergence (convergence). Such violation of parallelism of installation of wheels allows to minimize wear of a protector at the expense of prevention юза at commission of turns. At zero convergence distance between forward edges of wheels equally to distance between their back edges. Normal convergence usually does not exceed inch shares (1 inch = 2.54 cm). Violation of adjustment of convergence conducts to acceleration of wear of protectors of tires at the expense of a proskalzyvaniye them on a paving.

Vybegom is called a corner of a longitudinal inclination шкворня / axes of turn of a wheel, i.e., a corner of a deviation of this axis from a vertical in the rim plane. If the turn axis / шкворень is inclined back, выбег is called as positive, on the contrary.

By analogy, a cross-section corner an inclination of an axis of turn of a wheel call a corner of a deviation imagined шкворня from a vertical in the plane, perpendicular DP of the car.

In turn the difference between angles of rotation of internal and external wheels when the first is turned under the set corner is called as a divergence of operated wheels.

Conditions of check of corners of installation of wheels

Check of corners of installation of the car demands existence specially equipped the platform/lift. Before the beginning of check it is necessary to make sure of performance of the following conditions:

  • Pressure of air in tires corresponds to the nominal;
  • Forward wheels are established rectilinearly;
  • The car is not loaded, the fuel tank is completely filled;
  • Elements of a suspension bracket of the car осажены with effort;
  • The steering drive correctly is adjusted;
  • Lyufta in tips of steering drafts and spherical support of a suspension bracket do not leave out of admissible limits;
  • Depth of a protector of the tires established on wheels of one axis is identical.