Audi A4

Since 1994 of release

Repair and car operation

Audi А4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ Exhaust system
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and channels всасывания
+ Injection system
+ Coupling
+ Transmission and the 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 a brake liquid
   Check of brake system on tightness and presence of damages
   Replacement of a brake liquid
   Disk brakes
   Measurement of a 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
   Manual brake
   Check of idling of the lever of a manual brake
   The main brake cylinder
   The brake amplifier
   Check of the brake amplifier
   Works on hydraulics of brake system
   Prorolling 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)
   Infringements in system ABS work
   Electronic blocking of differential (EDS)
+ Wheels and tyres
+ The electrotechnical equipment
+ Ignition system
+ Illumination
+ The alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics

Replacement of a brake liquid

The brake liquid needs to be changed not only because of mentioned above danger of formation of vials of steam, but also because of danger of development of corrosion in brake cylinders and tubes because of the water absorbed by a brake liquid.


  1. If it is possible, suck away from a broad tank a brake liquid by means of a syringe for injections and at once fill in a new liquid.
  2. Pump over a brake liquid until from the prorolling valve the fresh liquid will not act.
  3. Through each valve of prorolling pump over 500 sm 3 brake liquids. It will fill all system with a fresh brake liquid.
  4. The ordered sequence: behind on the right, behind at the left, ahead on the right and in the end ahead at the left.