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

Check of a condition of brake disks

If forward wheels act in film for carrying out check of brake slips, the condition of brake disks is at the same time checked also.

On disks there should not be deep grooves (because of dirt or the too strongly erased blocks). Grooves deeply run into new brake slips that considerably reduces term of their service and reduces brake effect.

The scratched brake disks can be ground on the lathe if they for long time of service were not erased yet till the admissible minimum size.

Too thin disks are replaced with pairs.

The bluish shade of a brake disk has no value.

Sizes of brake disks

Brake disks
Ahead not ventilated
Ahead with internal ventilation
Thickness of the new
Minimum thickness
15 mm
13 mm
25 mm
23 mm
10 mm
8 mm