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





Back disk brakes

The same as on a forward axis, disk brakes of a back axis are so-called brakes with kulachkovy supports.

In addition to a hydraulic drive of a foot brake disk brakes of back wheels can be put in action also cables of the hand brake. By means of the lever to which the brake cable is attached, the brake piston nestles on a slip a pusher.

It is necessary to notice that brakes of back wheels in front-wheel and all-wheel drive models differ type of sharnirny connection of a cable of the hand brake, but for the rest it is a question of the same brakes.

Automatic adjustment

In cars automatic adjustment of disk brakes is structurally caused: in process of wear of a slip the brake piston simply leaves farther the case of a brake support and provides a constant prileganiye of slips to a brake disk. At the expense of brake liquid flowing after it a gap not образовывается.

Not so business is at a mechanical control the hand brake: here the pusher of drafts of the hand brake sometime will not get the piston which has been far put forward outside if additional adjustment is not carried out. It "extends" a pusher depending on requirement.

Basis of adjustment is the carving on which the second detail unscrews forward in process of wear of slips – so press device becomes longer. Therefore at replacement of slips the brake piston cannot be wrung out simply back, it needs to be screwed up on the adjusting mechanism.