Audi 80/90/Coupe

since 1986-1991 release

Repair and operation of the car


Audi 80/90/Coupe
+ 1.2. Identification of the car
+ 2. Engines, carburetors
3. Lubrication system
+ 4. Cooling system
+ 5. Fuel system
+ 6. Exhaust system
+ 7. System of ignition
+ 8. Transmission
+ 9. Suspension brackets, wheels
- 10. Brake system
   10.1.2. Brake shoes of forward brakes
   10.1.3. Brake shoes of back brakes
   10.1.4. General adjustment of back brakes (Girling)
   10.1.5. Replacement of brake shoes (all-wheel drive models)
   10.1.6. General adjustment of back brakes (Girling) (all-wheel drive models)
   10.1.7. Forks of pedals of a brake and coupling
   10.1.8. Adjustment of the emergency brake
   10.1.9. Removal of the lever of the emergency brake
   + 10.2. Hydraulic components
   + 10.3. Anti-blocking system of brakes
+ 11. Steering
+ 12. Body, salon
+ 13. Air conditioning system
+ 14. Electric equipment


10. Brake system

10.1. Mechanical components

10.1.1. Technical characteristics
GENERAL INFORMATION

Support of forward brakes  – Girling
1. 35 N. of m.
always replace
hold the directing pin at an inhaling and untwisting
2. Support
do not remove a brake hose when replacing brake shoes
3. Thermal screen
is established on the piston
4. Arm of brake shoes
is on sale as the spare part with previously greased directing pins
if protective caps were damaged, replace them with caps from a repair kit, a detail 443 698 470
 5. Brake shoes
always replace four blocks at once (on both wheels)
topshchina (new brake shoes): 14:00 mm
wear limit: 2.00 mm
wear limit (including fixing plates): 7.00 mm
6. Brake disk
replace at the same time both disks
remove a support before removal of a disk
diameter of a brake disk: 256.00 mm
thickness (the ventilated disk): 22:00 mm
wear limit: 20:00 mm
7. A bolt with a gear head, 125 N. of m clean teeths if you are going to use an old bolt
Prevention

At repair use all repair kit.

At repair restore a surface of brake disks from two parties at once, never process only one party. Always check a state and thickness of brake shoes.

Support of forward brakes – Giriing – for all-wheel drive and models with 20-valvate engines, and also Coupet's models

1. Support
do not remove a brake hose when replacing brake shoes
use a press for pressing in of the piston
support and old brake shoes for introduction of the piston to the cylinder
2. 35 N.m.
always replace
hold the directing pin at an inhaling and untwisting
3, 4. Brake shoes
always replace four blocks at once
(on both wheels)
after replacement of brake shoes press a brake pedal several times at the motionless car
thickness (new brake shoes): 13:00 mm
wear limit: 2.00 mm
wear limit (including fixing plates): 7.00 mm
 5. Brake disk
replace at the same time both disks
remove a brake support before removal of a disk
diameter of a brake disk: 276.00 mm
thickness: 25.00 mm
wear limit: 23:00 mm
6. Arm of brake shoes
is on sale as the spare part with previously greased directing pins
if protective caps were damaged, replace them with caps from a repair kit, a detail 443 689 470
7. 125 N. of m.
Prevention

Two самоконтрящихся a bolt from a repair kit are not required at repair of brakes of Teves. In the return case use all repair set.

Support of forward brakes – Teves
1. Cap
2. The directing pin, 25 N. of m.
3. Support
do not remove a brake hose when replacing brake shoes
4. A bolt with a gear head, 125 N. of m.
clean teeths if you are going to use an old bolt
5. Arm of brake shoes

 6. Brake shoes
always replace four blocks at once (on both wheels)
thickness of new brake shoes): 14:00 mm
wear limit: 2.00 mm
wear limit (including fixing plates): 7.00 mm
7. Brake disk
always replace brake disks on both wheels at once
remove a support for removal of a disk
diameter of a brake disk: 256.00 mm
thickness: 22:00 mm
wear limit: 20:00 mm
8. Thermal screen
is established on the piston

Support of back brakes – Girling
1. Spring clip
holds a brake napkovochnogo rope on a fixing arm
2. Rope of a parking brake
3. 65 N. of m.
4. Brake disk
always replace brake disks on both wheels for removal of a disk at once
diameter of a brake disk: 245.00 mm
thickness: 10:00 mm
wear limit: 8.00 mm
5. Brake shoes
always replace four blocks at once (on both wheels)
thickness (new brake shoes): 12:00 mm
wear limit: 2.00 mm
wear limit (including fixing plates): 7.00 mm
 6. Arm of brake shoes
is on sale as the spare part with previously greased directing pins
if protective caps were damaged, replace them with caps from a repair kit, a detail 443 698 470
7. Support
remove from an arm of brake shoes when replacing blocks
do not remove a brake hose when replacing brake shoes
at release models after January, 1989 diameter of the piston of a support is equal to 38 mm
when replacing use a support only the required type (with the piston of the required diameter)
8. 35 N. of m.
always replace
Prevention

At repair use all repair kit.

Technical characteristics

Models with the forward drive
Engine
4-or 5-cylinder
Diameter of the main brake cylinder
22.2 mm
Diameter of the amplifier
228.9 mm
Amount of brake fluid (approximately)
0.6 liter

Forward wheels
Back wheels
Diameter of the piston of a support of a brake
54 mm
36 mm
Diameter of a brake disk
256 mm
245 mm
Thickness of a brake disk
22 mm
10 mm
Thickness of brake shoes
14 mm
12 mm
Total area of four brake shoes
200 cm2
120 cm2
All-wheel drive models
Engine
5-cylinder
Diameter of the main brake cylinder
22.2 mm for models with the 136 h.p. engine.
23.81 mm for models with the 170 h.p. engine.
25.4 mm for Coupet's models
Diameter of the amplifier
228.9 mm for models with the 136 h.p. engine.
Diameter of the piston of the servo-driver of brakes
24 mm for models with the 170 h.p. engine.
Amount of brake fluid (approximately)
0.6 liter
 
Forward wheels
Back wheels
Diameter of the piston of a support of a brake
54 mm
36 mm
40/45 mm (for Coupet's models)
38 mm for release models after January, 1989
38 mm for models with the 170 h.p. engine.
Diameter of a brake disk
256 mm
245 mm
276 mm (for Coupet's models)
Thickness of a brake disk
22 mm
10 mm
25 mm (for Coupet's models)
Thickness of brake shoes
14 mm
12 mm
13 (for Coupet's models)
Total area of four brake shoes
194 cm2
108 cm2
224 cm2 (for Coupet's models)
Prevention

At repair use all repair kit.