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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6.1.8. Troubleshooting at unilateral wear of a brake shoe

Unscrew the flowing union on one of forward brake supports. Connect the manometer of a tester of the brake system.
Start the engine.

Modeling of various braking with a pressure прибл. 100 bars
Slowly press a brake pedal for achievement of various pressure.
Quickly press a brake pedal for achievement of various pressure.
Once with a force press on a brake pedal.
If the wheel is turned hardly and in the brake system there is no residual pressure,
the hard course or pollution of a brake shoe in a guide of a brake support is possible.
Jamming or hard piston stroke in a brake support is possible.
If the wheel is turned hardly and in the brake system there is residual pressure, the hard course of pedal knot or hit of a foreign matter in a mechanical part of pedal knot is possible.
If the pedal of a brake is possible to delay a little back and brake pressure reduces to zero, then the amplifier of the brake drive is subject to replacement or the hard course of pedal knot takes place.


6.1.7. Check of residual pressure

6.1.9. Check of the main brake cylinder