E39 series BMW 5

since 1996-2001 of release

Repair and car operation



E39 BMW
+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
- Suspension bracket and steering
   + Forward suspension bracket
   + Back suspension bracket
   - Steering
      Security measures at work with a safety cushion
      Removal and installation of a steering wheel
      Removal and installation of the top facing of a steering column
      Removal and installation of a tip of steering draft
      Removal and installation of steering draft
      Hydropump fastening
      Removal of air and filling of hydrosystem of the amplifier of a wheel with liquid
      Check and adjustment of corners of installation of wheels
+ Body
+ Onboard electric equipment
+ electric equipment Schemes
+ System of onboard diagnostics


Heavy Metal & Reflected



Check and adjustment of corners of installation of wheels

Achievement of optimum running parameters of the car and the minimum wear of tires probably only at the correct provision of wheels. At the increased and non-uniform wear of tires, and also unstable movement the car at the direct provision of a steering wheel and bad controllability on turns it is necessary to make optical verification of the provision of wheels.

To check corners of installation of wheels without the corresponding optical devices it is impossible. For this reason the description of only basic provisions is provided in the Guide on check of corners of installation of wheels.

Values of the main corners of installation of wheels are given in Specifications.

Convergence, disorder, corner of a cross-section inclination of an axis of turn of a wheel, corner of a longitudinal inclination of an axis of turn of a wheel

The convergence of wheels represents a difference of distances between the wheels, their axes measured at height between edges of rims. If the distance ahead is less than behind, the negative convergence, if on the contrary, a positive convergence takes place. The convergence can make 0°5 ’± 10’ (Е39).
Disorder and corner of a cross-section inclination of an axis of turn of a wheel reduce transfer of pushes at car movement by a steering and at the same time reduce a friction at movement on turns.

Disorder represents a corner of a deviation of the plane of a wheel from a vertical. Forward wheels thus stand at an angle. At negative disorder, for example, distance between wheels in a point of their contact of the road more than in the top point.

The corner of a cross-section inclination of an axis of turn of a wheel represents a corner between an axis of turn of a wheel and the vertical which has been carried out in a point of a contact of a wheel, looking at the car in the longitudinal direction.

Existence of corners of disorder and inclination of an axis of turn of a wheel approaches a point of contact of a wheel with the road to an axis of turn of a wheel. Thanks to it the so-called radius of a roller of steering transfer decreases. The less specified radius, the is easier driving on turn. Besides, dynamic impact on a car steering essentially decreases.

The corner of a longitudinal inclination of an axis of turn of a wheel represents a corner between an axis of turn of a wheel and a vertical in a point of contact of a wheel, looking at the car sideways. The longitudinal tilt angle of an axis of turn of a wheel essentially influences straightforwardness of movement of the car. Existence of a longitudinal tilt angle of an axis of turn of a wheel provides return of operated wheels to the provision of rectilinear movement, in particular, at movement on bad roads and at influence of a lateral wind.

Conditions of check of corners of installation of wheels

a) Forward wheels are put directly
b) Pressure of air in tires corresponds to the set
c) Loading of the car corresponds to the normal:
      • 2 x 68 kg in front,
      •  1 x 68 kg behind in the center,
      • 1 x 21 kg in the center of a luggage carrier,
      •  the fuel tank is completely filled

d) Suspension brackets of the car strongly прожаты
e) The steering is adjusted
f) Gaps in interface of steering drafts lie within admissible values
g) Lyufta suspension brackets lie within admissible values
h) The height of position of the car corresponds to the set.