Audi A4 with 2001- 2005 of release.
1. Operation and car maintenance service
2. The engine
3. Transmission
4. A running gear
5. The steering mechanism
6. Brake system
6.1. Preliminary checks
6.1.1. Brake disks
6.1.2. Check of brake system
6.1.3. Replacement of a brake liquid
6.1.4. Visual check of brake system on presence негерметичности and damages
6.1.5. Check of a thickness of brake overlays
6.1.6. Check at high and at low pressure
6.1.7. Check of residual pressure
6.1.8. Troubleshooting at unilateral deterioration brake pads
6.1.9. Check of the main brake cylinder
6.1.10. Prorolling of 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 brake system
6.3. Repair of brakes of forward wheels
6.4. System ABS
6.5. Tables
7. An onboard electric equipment
8. A body
9. Electric equipment schemes
 




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6.1.6. Check at high and at low pressure

Before the work beginning check up tightness of brake system (the main brake cylinder, brake hoses, pipelines of brake system and brake supports).

Check at a high pressure

Fig. 6.10. The device for pressure check in brake system


Unscrew прокачной the union on one of forward brake supports. Connect a manometre of a tester of brake systems and pump over (fig. 6.10).
Start the engine.
Establish the device for pressing of a pedal of a brake between a pedal of a brake and a seat of the driver. Create pressure upon brake pedals that the manometre has shown superfluous pressure 50 bar.
Switch off the engine.
During control time 45 about pressure drop should be no more than 4 bar.
If pressure drop is more 4 bar, check up brake system on tightness and restore it.

THE NOTE
Check at low pressure is authorised to be spent only in the event that check at a high pressure has passed successfully.

Check at low pressure
Establish the device for pressing of a pedal of a brake so that the manometre showed 6 bar of superfluous pressure.
Within 3 minutes of control time pressure drop should be no more than 1 bar.
At большем pressure drop it is necessary to replace the hydraulic block.


6.1.5. Check of a thickness of brake overlays

6.1.7. Check of residual pressure