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

Repair of a hydraulic drive of brakes

If the pipeline of a brake drive (1) and brake hoses (4) with stamped fixture (3) are connected with elements of a running gear or a body there should be no a springing holder of a hose (2). On an illustration connection is weakened рожковым by a wrench of 14 mm and a key for the brake pipeline (above).


  • The brake liquid is poisonous. Therefore it should not get to a mouth.
  • The brake liquid is aggressive in relation to a body covering. Therefore it is impossible to put the rags impregnated with a brake liquid or the tools stained with a brake liquid on body details.
  • At removal of a brake hose or the brake pipeline the brake liquid gradually follows from a receiver. You can prevent it as follows: before removal болтовых connections loosen the the prorolling valve in a corresponding contour.
  • Put on it a hose and direct it to any capacity. Now completely squeeze out a pedal of a brake and fix a suitable plate in this position. Drain apertures in the main brake cylinder will thus be closed – the brake liquid does not follow any more.
  • For removal and installation of the brake pipeline it is necessary for you to get specified in illustrations below a key for the brake pipeline. Also for придерживания brake hoses it is required to you рожковый a wrench of 14 mm.
  • After repair of hydrosystem of brakes it needs to be pumped over. Often happens to pump over enough only that brake contour in which works were spent.

Removal of the pipeline of a brake drive


  1. To turn out the union of the brake pipeline. For this purpose it is necessary to keep an opposite nut of connection – for example, at a brake hose.
  2. If a nut приржавела to a tube because of what it rotates together with a nut, it is necessary to replace this tube. Thin-walled tubes quickly break.
  3. If it is necessary to replace a corresponding piece of a tube, for easing of connections of the pipeline it is possible to use the following reception:
  4. To saw off the brake pipeline close болтового connections, to turn off накидную a nut шестигранной a head.
  5. To insert the brake pipeline in holders.
  6. To pump over brake system.

Removal of brake hoses


  1. At first to turn on щтуцер the corresponding brake pipeline. Thus to watch that the pipeline was not overwound.
  2. If the brake hose is fixed on a body by means of the stamped holder it is protected sheet bracket from проскальзывания. At assemblage it is necessary to establish this so-called holder of a hose.
  3. At installation of its hose it is necessary to twist at first on that end which has an external carving.
  4. Then to tighten other carving.
  5. The brake hose should not be overwound. For the control the colour strip or a rubber side serves.
  6. To pump over brake system.
  7. Right after repair to check up, whether the hose rubs somewhere at springing movements.
  8. Action to repeat after concerning a long trip.