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
   Independent work on brake system
   So the brake system works
   Check of brakes
   Brake liquid
   Check of level of a brake liquid
   Check of brake system on tightness and presence of damages
   Replacement of a brake liquid
   Disk brakes
   Measurement of a thickness of overlays of forward disk brakes
   Check of a condition of brake disks
   Replacement of overlays of disk brakes
   Back disk brakes
   Measurement of overlays of back disk brakes
   Manual brake
   Check of idling of the lever of a manual brake
   The main brake cylinder
   The brake amplifier
   Check of the brake amplifier
   Works on hydraulics of brake system
   Prorolling of brake system
   The help at malfunctions
   ABS and EDS
   What does ABS?
   Function of separate knots
   Electronic system of distribution of brake effort (EBV)
   Infringements in system ABS work
   Electronic blocking of differential (EDS)
+ Wheels and tyres
+ The electrotechnical equipment
+ Ignition system
+ Illumination
+ The alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics

вскрытие авто в череповце

Measurement of a thickness of overlays of forward disk brakes

Large brake overlays of forward disk brakes often maintain run more than 50 000 km. The control of a thickness of overlays is of great importance for safety, – about brakes easily "forget", in view of such high ходимость overlays, – as in Audi A4 is not present more to an alarm bulb of deterioration of brake overlays as it was in the previous models:

Measurement of a brake overlay on brakes of a forward wheel:

1 – an overlay material;
2 – a bearing plate from metal.


  1. The minimum thickness of an overlay makes 7 mm, including bearing plate. The bearing plate – a metal detail on which the overlay is pasted, – has a thickness about 5 mm, thus a material of a direct overlay should have the minimum thickness of 2 mm.
  2. At the fluent control with the removed cap of a wheel will light a lamp in an aperture of a rim and estimate a thickness of an overlay.
  3. More exact control at the removed wheel.
  4. Put a ruler to an overlay and measure, do not forget about a brake overlay on an inside!