Repair and service Audi A8 in body D2 with 1994 for 1999 of release.
1. Car operation
2. Maintenance service
3. Petrol engines of 2,8 l
4. Petrol engines of 3,7 and 4,2 l
5. Diesel engines of 2,5 l
6. Diesel engines of 3,3 l
7. Systems of ignition and injection of fuel of petrol engines
8. System of release of the fulfilled gases of cars with petrol engines
9. The power supply system of diesel engines
10. System of prestarting heating of diesel engines
11. System of release of the fulfilled gases of cars with diesel engines
12. Greasing system
13. Cooling system
14. Coupling
15. A transmission
16. Shaft of a drive of forward wheels
17. Features of a design of transmission of all-wheel drive cars
18. A suspension bracket
19. Wheels and tyres
20. A steering
21. Brake system
21.1. The general data
21.2. Antiblocking system of brakes (ABS)
21.3. Electronic system of stabilisation of course stability (ESP)
21.4. The general recommendations about operation and repair of antiblocking system of brakes and electronic system of stabilisation
21.5. Check of a rotor of gauge ABS
21.6. Replacement brake pads forward brake FN-3
21.7. Replacement brake pads forward brake HP-2
21.8. Replacement brake pads forward brake Brembo
21.9. Replacement back brake pads
21.10. Repair of forward support FN-3
21.11. Repair of forward support HP-2
21.12. Repair of forward support Brembo
21.13. Repair of a back support
21.14. A brake disk
21.15. The lever of a lay brake
21.16. Adjustment of a lay brake
21.17. Cables of a lay brake
21.18. Prorolling of a hydraulic drive of brakes
22. A body
23. Heating and air-conditioning system
24. An electric equipment
25. Electric schemes
 



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21.6. Replacement brake pads forward brake FN-3


Fig. 15–4. Forward brake FN-3: 1 – a brake tube; 2 – a protective cap; 3 – a directing finger, 25 Нм; 4 – a brake hose, 15 Нм; 5 – a support; 6 – a bolt, 120 Нм; 7 – the holder of a support (directing brake pads; 8 – brake pads; 9 – a spring; 10 – a brake disk; 11 – an arm; a 12-bolt, 10 Нм



The device of a forward brake is shown on fig. 15–4.

Removal
Loosen the bolts of fastening of a forward wheel, then lift a forward part of the car and fix on supports. Unscrew bolts of fastening and remove a wheel.
Necessarily replace all pads on one axis of the car even if one is worn out only колодка. If brake pads will be repeatedly established, before removal they are necessary for marking.
Remove protective caps from the internal ends of directing bolts.

Fig. 15–5. Removal of a fixing spring from support lateral aspect



Using a screw-driver edge as the lever, from support lateral aspect remove fixing spring (fig. 15–5).

Fig. 15–6. Вывинчивание a directing finger from a support



Unscrew directing fingers from a support (fig. 15–6).
Lift a support with internal pads and a soft wire tie up it to a forward rack. The support should not hang on a brake hose. The brake hose should not stretch or be overwound.
Remove internal pad from the piston of a support and external pad from the holder of a support.

Installation
Do not press a brake pedal at removed brake колодках.
At replacement brake pads do not unscrew a brake tube.
Clear a dust and a dirt from a support, and from edge of a brake disk – a rust. If pads are suitable to the further operation, clear their wire brush and rags.
Check up a brake disk on presence of cracks, especially round apertures under bolts of fastening of a wheel, and also with presence of deterioration or mechanical damages and if necessary replace both disks.
Measure a thickness of a brake disk.
If establish new brake pads, press the piston into a support, using the special adaptation. To press the piston into a support it is possible also a wooden core or the hammer handle. Thus watch, that the piston has not warped also surfaces of the piston and duster have not been damaged. At вдвигании the piston the brake liquid is superseded from the brake cylinder in a broad tank, therefore constantly observe of liquid level in a tank, and if necessary pump out from its tank a little.
Establish internal pad on a support, thus spring bracket should enter into piston dredging. On internal brake колодке with a spring the arrow is put. It should coincide with a direction of rotation of a disk at advance. Otherwise at work brake колодка will publish extraneous noise.
External brake pads fasten a sticky layer on a basic plate.

Fig. 15–7. An arrangement of lobbies brake pads before support installation



Remove a protective film from a sticky layer external brake pads and establish it on the holder of a support (fig. 15–7).
Establish a support with internal pads on the holder of a support. Screw in directing fingers of a support and tighten their moment 25 Нм.
Establish protective caps on directing fingers of a support.
Establish fixing spring on a support, having arranged the spring ends in support apertures.
Similarly replace brake pads on the second forward wheel.
Establish wheels and lower the car on the earth. Having cleared the ridge basis of heads of bolts, tighten bolts of fastening by the moment 120 Нм.
Some times press a brake pedal that brake pads have nestled on a brake disk.
Check up level of a brake liquid in a tank and if necessary add.
After installation new brake pads avoid sharp braking the first 200 km of run of the car.


21.5. Check of a rotor of gauge ABS

21.7. Replacement brake pads forward brake HP-2