Audi A4

since 1994 release

Repair and operation of the car



A4 Audi
+ 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 brake system
   So the brake system works
   Check of brakes
   Brake fluid
   Check of level of brake fluid
   Check of 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 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 work of 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





Main brake cylinder

Adjustment of the emergency brake

Details of an adjusting element

And – exact adjustment;
In – rough adjustment;

With – an adjusting nut;
D – the fixing collar.


The adjusting mechanism (1) with the fixing collar (2) is in covers of cables of the emergency brake before the back bridge.

The main brake cylinder in a certain degree is a basic element in brake system. It settles down behind at the left in a motive compartment and gives to brake supports a signal to begin braking. You will find more detailed information concerning its device and functioning in the beginning of this chapter.

Dismantle of the main brake cylinder

 PERFORMANCE ORDER

  1. Suck away brake fluid from a tank, for this purpose take out a strainer from a jellied branch pipe.
  2. Disconnect the socket of the alarm indicator of level of brake fluid from a tank, the same concerns a coupling cylinder wire.
  3. Take out a tank from the main brake cylinder.
  4. Dismantle a vacuum hose of the brake amplifier.
  5. Mark brake hoses on the main brake cylinder for the subsequent installation and unscrew them.
  6. Unscrew both fixing nuts (not bolts of TORX) behind on the main brake cylinder.
  7. Carefully and without bending, take out the main brake cylinder from the brake amplifier.
  8. At assembly put a new sealing ring between the brake amplifier and the main brake cylinder.
  9. Carefully put the main brake cylinder on the brake amplifier. If it is necessary, let the assistant will carefully press a brake pedal in order that it was easier to pull the main brake cylinder on press a rod.
  10. Tighten fixing nuts on 50 Nanometers.
  11. Tighten brake hoses on 15 Nanometers.
  12. Before the broad tank is pressed, moisten with brake fluid a sealing stopper of a connecting branch pipe of a broad tank from within.
  13. Pump over brake system.
  14. If it is necessary, pump over hydraulic system of coupling.