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
   Independent work on brake system
   So the brake system works
   Check of brakes
   Brake liquid
   Check of level of brake liquid
   Check of brake system on tightness and existence of damages
   Replacement of brake liquid
   Disk brakes
   Measurement of 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
   Hand brake
   Check of idling of the lever of the hand brake
   Main brake cylinder
   Brake amplifier
   Check of the brake amplifier
   Works on hydraulics of brake system
   Pumping 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)
   Violations in ABS system work
   Electronic blocking of differential (EDS)
+ Wheels and tires
+ Electrotechnical equipment
+ ignition System
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics

Measurement of thickness of overlays of forward disk brakes

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

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

1–slip material;
2–a bearing plate from metal.


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