Audi A4

since 1994 of release

Repair and car operation

A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and absorption channels
+ injection System
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
- Brakes
   Independent work on brake system
   So the brake system works
   Check of brakes
   Brake liquid
   Check of level of brake liquid
   Check of brake system on tightness and existence of damages
   Replacement of brake liquid
   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
   Hand brake
   Check of idling of the lever of the hand brake
   Main brake cylinder
   Brake amplifier
   Check of the brake amplifier
   Works on hydraulics of brake system
   Pumping of 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 ABS system work
   Electronic blocking of differential (EDS)
+ Wheels and tires
+ Electrotechnical equipment
+ ignition System
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics

Check of brake system on tightness and existence of damages

At carrying out check the bottom of the car should be dry in order that it was possible to see not tight sites. Brake liquid spreads also under dirt. Dark places from dampness can be signs of violation of tightness.


    Check all connecting knots and connection points, and also brake supports. Brake hoses should not be damp, bulked up or erased. Otherwise – replace. Brake tubes are covered with the protective layer protecting from a rust. If this layer is damaged, it can lead to emergence of a rust. Therefore never clean pipes a screw-driver, an emery paper or a wire brush, use an old rag. If the protective layer is damaged, on naked places it is necessary to apply a thin film an anticorrosive first coat. With flows of a rust or flattened it is necessary to replace tubes. On all unions of pumping there are protective caps? They are above on supports. Temporarily you can inspect pressure in brake system: Up to the end wring out a brake pedal. It should not give in even after several minutes of full loading if it not so, the cuff in the main brake cylinder is defective. Because of not tight cuff level of brake liquid 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. Not tight sites on cuffs of pistons of brake supports are distinguished on dark stains on brake supports. In a doubtful case address in a workshop.