Audi A4

since 1994 release

Manual of the car


Audi A4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
- Brakes
   Independent work on the brake system
   So the brake system works
   Check of brakes
   Brake fluid
   Check of level of brake fluid
   Check of the brake system on tightness and existence of damages
   Replacement of brake fluid
   Disk brakes
   Measurement of thickness of overlays of forward disk brakes
   Check of a condition of brake disks
   Replacement of overlays of disk brakes
   Back disk brakes
   Measurement of overlays of back disk brakes
   Emergency brake
   Check of idling of the lever of the emergency brake
   Main brake cylinder
   Brake amplifier
   Check of the brake amplifier
   Works on hydraulics of the brake system
   Pumping of the brake system
   The help at malfunctions
   ABS and EDS
   What does ABS?
   Function of separate knots
   Electronic system of distribution of brake effort (EBV)
   Violations in work of the ABS system
   Electronic blocking of differential (EDS)
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics

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Check of the brake system on tightness and existence of damages

When conducting check the bottom of the car has to be dry in order that it was possible to see untight sites. Brake fluid spreads also under dirt. Places, dark from dampness, can be tightness violation signs.

 PERFORMANCE ORDER

  1. Check all connecting knots and points of connection, and also brake supports.
  2. Brake hoses should not be damp, bulked up or erased. Otherwise – replace.
  3. Brake tubes are covered with the protective layer protecting from a rust. If this layer is damaged, then it can lead to emergence of a rust. Therefore never you clean pipes the screw-driver, an emery paper or a wire brush, use an old rag.
  4. If the protective layer is damaged, then on naked places it is necessary to apply a thin film of anticorrosive primer.
  5. Tubes with flows of a rust or flattened should be replaced.
  6. On all unions of pumping there are protective caps? They are above on supports.
  7. Temporarily you can carry out an inspection of pressure in the brake system:
  8. Up to the end wring out a brake pedal.
  9. It should not give in even after several minutes of full loading if it not so, then the cuff in the main brake cylinder is defective.
  10. Because of an untight cuff the level of brake fluid in a tank does not go down, liquid under pressure squeezes by the piston of the main brake cylinder on that party where there is no pressure.
  11. Untight sites on cuffs of pistons of brake supports are distinguished on dark stains on brake supports.
  12. In a doubtful case address in a workshop.