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

Check of tightness of brake system

For monitoring procedure the bottom part of a body should be dry that you could make out not tight places. The brake liquid gets and under a dirt. Dark places from a moisture force to assume leak.


  1. Check all places of connections, and also supports of the disk brake mechanism and guards of the drum-type brake mechanism behind which wheel brake cylinders are located.
  2. Hoses of brake system should not be damp, swelled or shabby. Otherwise it is necessary to replace them.
  3. Pipelines of brake system have a corrosion-resistant coating. If to damage this protective layer rust formation can begin. Therefore never it is impossible to clean serviceable pipelines of brake system by means of a screw-driver, наждачной a skin or a wire brush.
  4. If the protective layer is damaged, it is necessary to put a thin layer противокоррозийную a first coat.
  5. With traces of a rust or squeezed it is necessary to replace tubes.
  6. Whether all valves of prorolling are protected by protective caps? They are on supports of disk brake mechanisms or in guards of drum-type brake mechanisms.
  7. You can spend the improvised check of pressure in brake system:
  8. Squeeze out a pedal of a brake with full force.
  9. It should not give in and after several minutes of full loading, one of cuffs of the main brake cylinder otherwise is defective.
  10. Because of not tight cuff liquid level in a tank does not go down, however the squeezed liquid flows through the piston in the main brake cylinder on other party where pressure is absent.
  11. Not tight places on cuffs of pistons of supports of disk brake mechanisms and brake cylinders of drum-type mechanisms can be distinguished in dark places on supports disk or guards of drum-type brake mechanisms.
  12. If you are not assured – address in a workshop.