S-class W202 Mercedes
1993-2000 of release
Repair and car operation
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
- 11. Steering
11.2. The block of an inflatable safety cushion on a steering wheel
11.3. Steering wheel
11.4. Steering trapeze
11.5. Cuffs of hinges of a steering trapeze
11.6. Power steering pump
11.7. Disorder convergence installation
11.8. Easily and easy
11.9. Maintenance of system of a steering
11.10. Diagnostics of malfunctions of system of a steering
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electroschemes
Optimum road performance and the minimum wear of rubber are reached only if the provision of wheels is correctly exposed. At the increased and non-uniform wear of tires, and also a road incontience – at bad stability of the direction and insufficient stability on turns it is necessary to address in a workshop, that by means of optical methods to expose disorder convergence.
Installation of disorder convergence cannot be carried out without the corresponding equipment. Therefore only the main concepts necessary for installation of disorder convergence here are described.
The corner on which the plane of a wheel deviates a longitudinal axis of the car is called as a convergence. The positive convergence means that wheels at measurement in front agree on height of their centers a little closer, than behind. The negative convergence means that wheels in front disperse more than behind.
At the Mercedes car both forward, and back wheels have a positive convergence: forward wheels – 0°25' (a sports suspension bracket 0°10'), back wheels – 0°25'.
Disorder and cross-section inclination шкворня rotary fist
Disorder and cross-section inclination шкворня a rotary fist reduce transfer of pushes by a steering and provide the minimum friction on turns.
Disorder call a corner on which the plane of a wheel deviates a vertical. Forward wheels, thus, will defend at negative disorder in a contact point with the road further from each other, than from above. At the Mercedes car lobbies and back wheels have negative disorder.
The cross-section inclination шкворня is a corner between an axis of turn of a fist and a vertical in a point of standing of a wheel if to look in the longitudinal direction of the car.
Disorder and cross-section inclination шкворня a rotary fist in common define a so-called shoulder of a running in. Thanks to the relevant constructive data, big stability in the direction is reached when braking, in particular, if wheels are on a various paving (for example if the left wheel brakes on dry, and right – on the wet road).
Longitudinal inclination шкворня back
The longitudinal inclination шкворня is a corner between an axis of turn of a fist and a vertical in the cross-section direction back. This inclination substantially influences management of forward wheels at movement on a straight line. The insignificant inclination favors to deviations from the movement direction when driving on bad roads or at a lateral wind, and on turns the wheel badly comes back to average situation.
The longitudinal inclination together with disorder is exposed by means of two bolts with the clown on suspension bracket levers.
Preconditions for check
– the ordered pressure of air in tires;
Check/installation of a positive convergence of forward wheels
The provision of forward wheels at the sight of from above
Exact installation of disorder convergence should be made only in a firm workshop. At unilateral wear of tires the convergence generally should be checked. The convergence is checked, if parts of a steering trapeze acted in film. The convergence can be checked by rather simple means.
The above-stated preconditions for check should be observed.