Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car


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
+ System of injection
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
- Brake system
   Check of brake mechanisms
   Brake fluid
   Check of level of brake fluid
   Check of tightness of brake system
   Replacement of brake fluid
   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 brake mechanism
   Measurement of brake shoes of the drum mechanism
   Check of the 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 the hydraulic drive of brakes
   Pumping of brake system
   List of malfunctions
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ 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 66 kW model which is not equipped with ABS which is let out till October of 92 g on the back bridge disk brake mechanisms instead of the drum are installed. It is, as well as in a case with brakes of the forward bridge, about disk brake mechanisms with a floating bracket.

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

Automatic control

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

On another it occurs in the mechanical drive of parking brake system: here press the drive pusher at some point of time simply could not get the piston coming to light 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 part of a pusher. The press device thus becomes longer. Therefore when replacing blocks it is impossible to push simply back the brake piston, it is turned off back on the adjusting device.