Audi 80/Avant (B4)

Audi 80/Avant
The description
System of release of the fulfilled gases
Cooling system
Fuel tank and the fuel pump
The air filter and intake channels
Injection system
Transmission and transmission
Suspension bracket and steering
- Brake system
   Check of brake mechanisms
   Brake liquid
   Check of level of a brake liquid
   Check of tightness of brake system
   Replacement of a brake liquid
   Disk brake mechanisms
   Measurement of a thickness pads the disk mechanism
   The control of a condition of brake disks
   Replacement pads disk brake mechanisms
   The drum-type brake mechanism
   Measurement brake pads the drum-type mechanism
   Check of a course of a pedal of a brake
   The disk brake mechanism of back wheels
   Measurement of a thickness pads back disk brakes
   Check of a free wheeling of the lever of a lay brake
   The main brake cylinder
   The amplifier of brakes
   Check of the amplifier of brakes
   Regulator of brake forces
   Repair of a hydraulic drive of brakes
   Prorolling of brake system
   The list of malfunctions
Antiblocking system of brakes
Wheels and tyres
body electrosystem
Ignition system
Signalling devices
Devices and auxiliary devices
Heating and ventilation
Body elements
Search of malfunctions

Regulator of brake forces

The regulator of brake forces (1) for the back bridge of front-wheel models is connected with the back bridge a spring (2) and приводным the lever (3).

At the left: the 5-cylinder engine is supplied by the additional vacuum pump (2) in addition strengthening lowered pressure in a hose from an inlet collector (1). Thus in a hose (4) in front of the pump to the amplifier (5) enough force for operation of brakes is provided. That разряжение it was not lost, before branch to the pump the return valve (3) is established.

On the right: here the vacuum pump is shown once again at a short distance. Figures correspond to the left illustration.

At front-wheel versions Audi 80 regulator of brake forces is located at the left arm of the bearing on the right on a course in front of the back bridge. It can reduce pressure of a liquid in back wheel cylinders.

It occurs depending on loading: at completely loaded car the back part of a body falls at small loading if in the car one or two person sits, the deflection of back springs is insignificant. Because of excessive pressure upon back wheels they are prematurely blocked, and the car at braking can develop across.

The regulator of brake forces receives through a spring connected with the back bridge, the information on a condition of loading of the car – depending on that, the back bridge has how much low fallen.

Check of a regulator of brake forces

For fast check of action the assistant is required to you. The car should not be raised a jack.


  1. Sharply squeeze out up to the end a pedal of a brake and quickly clean a foot.
  2. Thus the lever of a regulator of brake forces should move.

Regulator of brake forces of all-wheel drive models

At all-wheel drive models Audi 80 regulator of brake forces is located ahead near to block ABS in a motor compartment. It of more simple design. Blocking of back wheels prevents this regulator that he at all does not allow brake pressure of the back bridge to enter into a dangerous zone.