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

Check of level of brake liquid

Tank with brake liquid (2):

1–level marks, are lower connection for a control bulb;

Continuous check


  1. About too low level of brake liquid in Audi 80 you though will be warned by the indicator on a control panel, but nevertheless it is impossible to refuse visual control:
  2. To open a cowl and if necessary to clear a rag a receiver of brake liquid.
  3. Level of brake liquid should be in a transparent tank between «min» and «max» marks. In this case everything is all right.

Too low level of liquid?

If overlays of the disk brake mechanism wore out already a little, level of liquid is most likely near the bottom mark; if they new, most likely it is above. It is absolutely normal, because the pistons of the disk brake mechanism acting at worn-out slips already a few are farther, leave in cylinders of supports bigger volume which is filled with brake liquid.

The critical moment comes, if level of brake liquid in a tank falls below the minimum mark. As brake liquid does not evaporate and is not spent, it means that in system somewhere there is not tight place. Therefore it is necessary to look for urgently the reason and a leakage place, without waiting, while the pedal of a brake will leave in emptiness. It is simple to add liquids in a tank is a self-deception!