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
6.2. Repair of brake system
6.2.1. The amplifier of a brake drive тандемного type / the main brake cylinder in cars with the left wheel
6.2.2. Removal and installation of the vacuum pump of brakes
6.2.3. Removal and installation of the gauge of pressure of the amplifier of a brake drive
6.2.4. The electric vacuum pump
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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6.2.1. The amplifier of a brake drive тандемного type / the main brake cylinder in cars with the left wheel

Fig. 6.11. Components of the amplifier of a brake drive тандемного type: 1 – a vacuum hose; 2 – a bolt with the cylindrical end, 8 Нм; 3 – a tank for a brake liquid with поплавковым the indicator; 4 – a cover; 5 – a sealing stopper; 6 – the amplifier of a brake drive; 7 – the pedal block; 8 – a submitting hose; 9 – a forward wall; 10 – the screw, 25 Нм; 11 – a nut with a fillet, 50 Нм; 12 – the main brake cylinder; 13 – the brake pipeline, 15 Нм; 14 – манжетное consolidation



THE NOTE
The main brake cylinders – not folding, i.e. their repair is not provided
Use only a new brake liquid. Observe the instructions resulted on packing with a brake liquid.

Adjustment of a spherical head
Adjust a spherical head:
a – 159 mm 0,5 mm.

Fig. 6.12. The scheme of adjustment of a spherical head



THE NOTE
The relative plane 1 is intended for the nominal size (fig. 6.12).

At measurement the spherical head should be exposed perpendicularly to a plane of the amplifier of a brake drive.
Measure distance without a lining till the end of a spherical head.
The moment of an inhaling of a spherical head on the amplifier of a brake drive 30 Нм.

Removal and installation of the main brake cylinder from the amplifier of a brake drive

Fig. 6.13. The repair complete set заглушек


For removal of the brake cylinder the repair complete set заглушек 1H0 698 311 A (fig. 6.13) is required.

Removal
Remove a ware compartment from outside the driver.

Fig. 6.14. Поворачивание the switch of stoplights


The switch of a stoplight 1 turn to the left on 45 and take (fig. 6.14).

Fig. 6.15. Connection of a pedal of a brake and the amplifier of a brake drive


Disconnect a pedal of a brake from the amplifier of a brake drive by means of a stripper (fig. 6.15).
Pump out a brake liquid by means of the complete set of the equipment, the unit for prorolling of brake system or the unit for prorolling of brake system.
Uncover a water taking away box.
Lay in the field of a water taking away box enough of not leaving fibres of rags.
Open a tank with a brake liquid.

Fig. 6.4. Device connection to a branch pipe of a tank with a brake liquid


Pump out a brake liquid (fig. 6.4).
Disconnect a gauge socket поплавкового the indicator 1.

Fig. 6.16. A gauge socket поплавкового the indicator and a vacuum highway


Remove a vacuum highway 2 (fig. 6.16).

Fig. 6.17. A fixing bolt of capacity of a brake liquid


Unscrew a fixing bolt of 1 capacity of a brake liquid (fig. 6.17).

THE NOTE
Take measures on protection of a water taking away box against a following brake liquid.

The capacity of a brake liquid fastens on latches to the bottom party on the main brake cylinder.
For removal wring out downwards clamps on capacity and simultaneously take capacity of a brake liquid from заглушки.
Remove and put aside a tank for a brake liquid.

Fig. 6.18. Pipelines of brake system


Turn off pipelines of brake system 1 and 2 and close заглушками from ремкомплекта ET. – № 1H0 698 311 A (fig. 6.18).
Lay in area of the block of management of hydrosystem enough of not leaving fibres of rags.

Fig. 6.19. Pipelines of brake system and rubber nozzles


Turn off pipelines of brake system 1 and 2 and take together with a rubber nozzle (fig. 6.19).

Fig. 6.20. Fastening of the amplifier of a brake drive


Unscrew fixing bolts of the amplifier of a brake drive 1 (Torx T45) (fig. 6.20).
Remove the amplifier of a brake drive with the main brake cylinder.
On the cars having a cross-beam, it needs to be removed.

Fig. 6.21. Fastening of the main brake cylinder


Turn off fixing nuts of the main brake cylinder 1 (fig. 6.21).
Cautiously remove the main brake cylinder from the amplifier of a brake drive.

Installation
At installation especially it is necessary to observe the following.
Before installation of the amplifier of a brake drive clear water taking away box of the remained flowed out brake liquid.
At assemblage of the main brake cylinder with the amplifier of a brake drive watch correctness of landing of a press bar on the main brake cylinder.
Adjust the stoplight switch.
Remove air from brake system.


6.2. Repair of brake system

6.2.2. Removal and installation of the vacuum pump of brakes