Audi 80/90/Coupe

since 1986-1991 of release

Repair and car operation



Audi 80/90/Coupe
+ 1.2. Car identification
+ 2. Engines, carburetors
3. Greasing system
+ 4. Cooling system
+ 5. Fuel system
+ 6. Exhaust system
+ 7. Ignition system
+ 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 hand brake
   10.1.9. Removal of the lever of the hand brake
   - 10.2. Hydraulic components
      10.2.1. Hydraulic booster of brakes / main brake cylinder
      10.2.2. Changes in hydraulic system
      10.2.3. Main brake cylinder / сервоцилиндр brake system
   + 10.3. Anti-blocking system of brakes
+ 11. Steering
+ 12. Body, salon
+ 13. Central air
+ 14. Electric equipment







- dfe5d7b3


10.2.2. Changes in hydraulic system

GENERAL INFORMATION

Hydraulic system

1. Return pipeline
going from the steering valve
inhaling moment: 40 N of m.
2. 20 N of m.
3. Tube of a high pressure
4. 35 N of m.
use only a "banjo" bolt without the filter
5. Hydraulic pump
is not subject to repair
6. A soaking-up hose
7. 50 N of m.
8. Hose of the return pipeline
9. Rubber plug
10. 10 N of m.
11. Arm
for fastening of the accumulator of pressure
12. Pressure accumulator
before removal reduce pressure, having pressed a pedal of a brake about 20 times at the switched-off engine
before removal of the old accumulator drill an opening in diameter about 3 mm on the party with air (the party on which there are no connections)
13. 35 N of m.
use a "banjo" bolt with the filter
14. Steering drive
has a clip for fastening of a tube of a high pressure
15. Return hose
16. Tank
with the alarm indicator of level of oil
fill with oil for greasing of hydraulic systems
check of level of oil: turn forward wheels directly, let's to the engine work in a single mode about 2 minutes then muffle the engine and check oil level
17. Tube of a high pressure
before removal reduce pressure, having pressed a pedal of a brake about 20 times at the switched-off engine
18. Servotsilindr of brake system
is not subject to repair
19. Dashboard
20. Return pipeline
21. Tee

Always replace sealing rings in places of connections.


Prevention

Put on goggles when drilling opening in the pressure accumulator.


Since 1990 the following elements were modified on cars with a hydraulic drive of brakes:

      – tubes of a high pressure;
      – "banjo" bolts for connections of tubes of a high pressure in connection places to the hydraulic pump and the pressure accumulator;
      – sealing rings for connections of tubes of a high pressure;
      – hydraulic pump;
      – pressure accumulator;
      – arm of the accumulator of pressure;
      – plug of fastening of the accumulator of pressure.

These changes were entered gradually since model: Compartment 8B LA 006 861.

Changes in hydraulic system

1. Tube of a high pressure
with flutes for installation of sealing rings
2. Banjo bolt
with the filter
M10x1 (there was M12x1.5), 30 N of m.
3. Sealing rings
always replace
earlier were metal
4. Hydraulic pump
carving for connection of a tube of a high pressure = M10x1 (there was M12x1.5)
use new metal epiploons at VW 1354 connection
5. Plugs, grease with anticorrosive greasing at installation
6. Fastening
establish plugs and put on the accumulator
7. "Banjo" bolt
with the filter
M10x1 (there was M12x1.5)
8. Pressure accumulator
carving for connection of a tube of a high pressure = M10x1 (there was M12x1.5)
pressure of the new accumulator = 78-82 Bar
9. Arm
for fastening of the accumulator of pressure
establish on the car before installation of hydraulic tubes