Service of Audi A4 from 2001 to 2005 release.
1. Operation and maintenance of the car
2. Engine
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
6.1. Preliminary checks
6.1.1. Brake disks
6.1.2. Check of the brake system
6.1.3. Replacement of brake fluid
6.1.4. Visual check of the brake system on existence of leakage and damages
6.1.5. Check of thickness of brake slips
6.1.6. Check at high and with a low pressure
6.1.7. Check of residual pressure
6.1.8. Troubleshooting at unilateral wear of a brake shoe
6.1.9. Check of the main brake cylinder
6.1.10. Pumping of the brake system
6.1.11. Process of removal of air for cars with electronic system of maintenance of course stability (ESP)
6.2. Repair of the brake system
6.3. Repair of brakes of forward wheels
6.4. ABS system
6.5. Tables
7. Onboard electric equipment
8. Body
9. Schemes of electric equipment
 




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6-1-3-zamena-tormoznojj-zhidkosti.html

6.1.3. Replacement of brake fluid

NOTE
Apply only new original brake fluid of VW/Audi concern.

ATTENTION
Do not allow contact of brake fluid with liquids which part mineral oil (engine oil, gasoline, detergents) is. Mineral oils destroy consolidations and cuffs of the brake system.
Brake fluid is poisonous. Due to the corroding action do not allow its contact with a paint and varnish covering of the car.
Brake fluid is hygroscopic and absorbs moisture from air and has to be stored constantly in densely closed containers without air access.
The spilled brake fluid needs to be washed away a large amount of water.


Fig. 6.3. A tank cover with brake fluid


Unscrew a cover of 1 tank with brake fluid (fig. 6.3).

ATTENTION
Do not delete a grid from a tank with brake fluid.

Unscrew a tank stopper with brake fluid.

Fig. 6.4. Connection of the device to a tank branch pipe with brake fluid


Connect a drain hose of the device to a branch pipe of 1 tank with brake fluid (fig. 6.4).
Through a drain hose of the device pump out as much as possible brake fluid.
Disconnect a drain hose.
Screw up a tank stopper with brake fluid.

ATTENTION
Do not use the pumped-out (reused) brake fluid.

Connect the adapter 1 to a tank with brake fluid.

Fig. 6.5. Connection of the adapter and a jellied hose to a tank with brake fluid


Connect a jellied hose 2 devices or to the adapter (fig. 6.5).

Cars with the mechanical transmission
Remove a protective cap from the flowing union of the working cylinder of coupling.

Fig. 6.6. Connection of capacity for discharge of brake fluid


Put on a hose of 1 capacity for discharge of brake fluid the flowing union of the working cylinder of coupling, open the flowing union and wait until flows out apprx. 100 ml of liquid (fig. 6.6).
Close the flowing union and put on a protective cap.
Then several times press a coupling pedal.

Continuation for all cars
Remove protective caps from flowing unions.
Put on a hose of 1 capacity for discharge of brake fluid the forward left flowing union, open the union and wait until about 200 ml of liquid flow out. Close the flowing union.
Repeat process on other party of a forward part of the car.
Put on a hose of 1 capacity for discharge of brake fluid the back left flowing union, open the union and wait until about 200 ml of liquid flow out. Close the flowing union.
Repeat process on other party of a back part of the car.

Volumes of brake fluid
In front at the left: 200 ml.
In front on the right: 200 ml.
Behind at the left: 200 ml.
Behind on the right: 200 ml.
The general объем*: 1000 ml.
* Including the volume which is pumped out from a tank with brake fluid and the replaced liquid volume in the hydraulic amplifier of coupling.

Put on protective caps flowing unions of brake supports.
For filling of brake fluid install the lever of the device in situation B (see the operation manual).
Disconnect a jellied hose from the adapter.
Unscrew the adapter from a tank with brake fluid.

Fig. 6.7. Levels of brake fluid in a tank


Check the level of brake fluid, if necessary modify (fig. 6.7).
Screw up a tank cover with brake fluid.
Check pressure upon a pedal of a brake and its free wheeling. Free wheeling max. 1/3 courses of a pedal


6.1.2. Check of the brake system

6.1.4. Visual check of the brake system on existence of leakage and damages