Audi A4

since 1994 of release

Repair and car operation



A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and absorption channels
+ injection System
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
- Wheels and tires
   Designations of tires
   Rims
   Wide-profile tires and rims
   Pressure check in tires
   Check of a condition of tires
   Replacement of wheels
   Check of durability of fastening of wheel bolts
   Unbalanced wheels
   Purchase of new tires
+ Electrotechnical equipment
+ ignition System
+ Lighting
+ 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 situation, as earlier. For this purpose designate the assembly provision 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

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