Opel Astra A

1991-1998 of release

Repair and operation of the car

Opel Astra A
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 4. Ventilation and heating
+ 5. Power supply system
+ 6. System of decrease in toxicity
+ 7. Coupling
+ 8. Transmissions
+ 9. Half shafts
- 10. Brake system
   10.1. Technical characteristics
   10.2. System of anti-blocking of brakes (ABS)
   10.3. Protivobuksovochny system
   10.4. Hydraulic system
   10.5. Hydraulic tubes and hoses
   10.6. Brake overlays of forward brakes
   10.7. Support of a forward brake
   10.8. Brake disk
   10.9. Protective guard of a forward disk brake
   10:10. Brake shoes of back brakes
   10:11. Brake drum of back brakes
   10:12. Wheel cylinder of a back brake
   10:13. Brake overlays of back brakes
   10:14. A support of a back brake (model with back disk brakes)
   10:15. Brake overlays of the emergency brake
   10:16. Guard of a back brake
   10:17. Brake pedal
   10:18. Vacuum amplifier
   10:19. Unilateral valve (servoamplifier)
   10:20. Main brake cylinder
   10:21. Emergency brake
   10:22. Lever of the emergency brake
   10:23. Ropes of the emergency brake
   10:24. The valve of restriction of pressure in a contour of back brakes
   10:25. Switch of fires of a stoplight
   10:26. Switch of alarm bulbs of the brake system
   10:27. ABS modulator
   10:28. ABS wheel sensor of a forward wheel
   10:29. Electronic control unit and ABS relay
   10:30. Case of a butterfly valve
   10:31. Vacuum diaphragm of a butterfly valve (antitowing system)
   10:32. Electronic control unit (antitowing system)
   10:33. Switch of antitowing system
+ 11. Suspension bracket and steering
+ 12. Body
+ 13. Electric equipment
+ 14. Electrical circuitries


10.4. Hydraulic system


Effective work of any hydraulic system is possible only after removal from it all air. Process of removal of air of the brake system is called pumping.

When pumping use only new, pure brake fluid. Before pumping fill a tank with brake fluid above mark MOVE and you watch that the level of brake fluid did not fall below this mark.


After carrying out repair on one of brakes, it is necessary to pump over only one contour of the brake system. If the main cylinder of the brake system was disconnected, it is necessary to pump over all brake system. On models with ABS the first need to pump over a contour of forward brakes.

Pumping – the main method (the assistant is required)

1. Remove a plastic cap from the valve of production of air on a brake of the first wheel and put on it a rubber tube. Lower the second end of a tube in the capacity filled with brake fluid.
2. Check that the level of brake fluid in a tank was above the mark MIN and ask the assistant to squeeze out a brake pedal several times and to leave it pressed.
3. Turn off the pumping valve (approximately on one turn) and wait until brake fluid flows down. When the stream of liquid stops, close the valve, ask the assistant to release slowly a pedal of a brake and check liquid level in a tank.
4. Repeat point 3 until in the following brake fluid is vials of air.
5. Reliably tighten the pumping valve, pick up the phone and put on a cap.
6. Repeat operation of pumping on brakes of other wheels in the required sequence.

Pumping with use of a set with the unilateral valve

In a rubber tube of such set the unilateral valve preventing hit of air and old brake fluid back in the brake system is installed. Capacity for collecting old brake fluid can be also included in the package.

Pumping with use of a set for pumping under pressure

Having connected a set for pumping under pressure to a tank of brake fluid, for pumping of system it is rather simple to open pumping valves in turn for a slitiya of old brake fluid and production of air.

All methods

Upon completion of pumping wash away the spilled brake fluid, reliably twirl valves of pumping and establish on them caps. Double-check the level of brake fluid.
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