Audi A4

Since 1994 of release

Repair and car operation

Audi А4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ Exhaust system
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and channels всасывания
+ Injection system
+ Coupling
+ Transmission and the main transfer
+ Suspension bracket of wheels and steering
+ Brakes
- Wheels and tyres
   Designations of tyres
   Rims
   Wide-profile tyres and rims
   Pressure check in tyres
   Check of a condition of tyres
   Replacement of wheels
   Check of durability of fastening of wheel bolts
   Unbalanced wheels
   Purchase of new tyres
+ The electrotechnical equipment
+ Ignition system
+ Illumination
+ The alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics

Unbalanced wheels

If the serviceable wheel balanced on the car, has to be mounted again, for example, after brake check it should be screwed on a wheel nave in the same position, as earlier. For this purpose designate assembly position of a rim and a nave (arrow) how it is shown here.

Imbalance of wheels is felt on vibration in a wheel and jolting in a forward part of the car. Especially strongly it is shown at certain speeds. The reason is covered in non-uniform distribution of weight to a wheel.

Balancing of wheels

Wheels should be exposed to static and dynamic balancing. For this purpose there are two methods:

PERFORMANCE ORDER

The car wheel acts in film and put on the balancing car. There it rotates for check. Thanks to it receive the information on a disbalance which is levelled by addition of lead sinkers.
For an exception of a residual disbalance exact balancing is required. The disbalance of a nave of a wheel and a brake disk is thus levelled. Wheels by the car are resulted in rotation with the necessary speed by means of the electric motor with a frictional disk, and, thus, receive data on a residual disbalance. It again level by means of lead sinkers.
For exact balancing of wheels Audi A4, all four wheels of the car should be lifted.
In the absence of own drive back wheels in front-wheel Audi at dynamic balancing are resulted in rotation by the electric motor with a frictional wheel.