Audi 80/Avant (B4)

since 1991-1995 of release

Repair and car operation


Audi 80/Avant
+ Technical specification
+ Engines
+ System of production of the fulfilled gases
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ injection System
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
- Brake system
   Check of brake mechanisms
   Brake liquid
   Check of level of brake liquid
   Check of tightness of brake system
   Replacement of brake liquid
   Disk brake mechanisms
   Measurement of thickness of blocks of the disk mechanism
   Control of a condition of brake disks
   Replacement of blocks of disk brake mechanisms
   Drum-type brake mechanism
   Measurement of brake shoes of the drum-type mechanism
   Check of a course of a pedal of a brake
   Disk brake mechanism of back wheels
   Measurement of thickness of blocks of back disk brakes
   Check of a free wheeling of the lever of the parking brake
   Main brake cylinder
   Amplifier of brakes
   Check of the amplifier of brakes
   Regulator of brake forces
   Repair of a hydraulic drive of brakes
   Pumping of brake system
   List of malfunctions
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrosystem
+ ignition System
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications



Disk brake mechanism of back wheels

Except for the model in capacity of 66 kW which has not been equipped with ABS, 92 g let out till October, on the back bridge are established disk brake mechanisms instead of the drum-type. It is a question, as well as in a case with brakes of the forward bridge, about disk brake mechanisms with a floating bracket.

In addition to a hydraulic drive through a brake pedal the disk brake mechanism can be served also by a hummock drive of system of the parking brake. The lever on which the corresponding cable is fixed, puts in action a pusher which the brake piston nestles on blocks.

Automatic control

Designs of disk brake mechanisms in the car are always carried out by the self-regulating: with increasing wear of brake shoes the brake piston simply leaves farther a support of the disk brake mechanism, providing with that a dense prileganiye of brake shoes to a brake disk. Owing to filling of the added volume in the cylinder brake liquid education люфта is impossible.

On another it occurs in a mechanical drive of lay brake system: here press the drive pusher at some instant time simply could not get the coming to light piston if there was no adjusting device. It "extends" a pusher as required. The main part of regulation is a carving on which depending on wear of blocks everything further forward wells up a part of a pusher. The press device thus becomes longer. Therefore at replacement of blocks it is impossible to push simply back the brake piston, it turn off back on the adjusting device.