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
      10.2.1. Hydraulic booster of brakes / main brake cylinder
      10.2.2. Changes in hydraulic system
      10.2.3. Main brake cylinder / servo cylinder of the brake system
   + 10.3. Anti-blocking system of brakes
+ 11. Steering
+ 12. Body, salon
+ 13. Air conditioning system
+ 14. Electric equipment






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 high pressure
4. 35 N. of m.
use only a bolt of "banjo" without filter
5. Hydraulic pump
is not subject to repair
6. The 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 with a diameter about 3 mm on the party with air (the party on which there are no connections)
13. 35 N. of m.
use a bolt of "banjo" with the filter
14. Steering drive
has a clip for fastening of a tube of high pressure
15. Return hose
16. Tank
with the alarm indicator of level of oil
fill with oil for lubricant of hydraulic systems
check of level of oil: turn forward wheels directly, let's the engine work in the single mode about 2 minutes then kill the engine and check oil level
17. Tube of high pressure
before removal reduce pressure, having pressed a pedal of a brake about 20 times at the switched-off engine
18. Servo cylinder of the 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 an opening in pressure accumulator.


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

      – tubes of high pressure;
      – bolts of "banjo" for connections of tubes of high pressure in places of connection to the hydraulic pump and the accumulator of pressure;
      – sealing rings for connections of tubes of high pressure;
      – hydraulic pump;
      – pressure accumulator;
      – pressure accumulator arm;
      – 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 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 high pressure = M10x1 (there was M12x1.5)
use new metal epiploons at connection of VW 1354
5. Plugs, grease with anticorrosive lubricant at installation
6. Fastening
install plugs and put on the accumulator
7. Bolt of "banjo"
with the filter
M10x1 (there was M12x1.5)
8. Pressure accumulator
carving for connection of a tube of high pressure = M10x1 (there was M12x1.5)
pressure of the new accumulator = 78-82 Bars
9. Arm
for fastening of the accumulator of pressure
install on the car before installation of hydraulic tubes