BMW E30 + 1. Maintenance instruction + 2. Maintenance + 3. Engine + 4. Cooling system + 5. Heating and ventilation + 6. Fuel system + 7. Exhaust system + 8. Transmissions + 9. Coupling - 10. Brake system 10.2. Specifications 10.3. Anti-blocking system (ABS) 10.4. Blocks of disk brakes 10.5. Support of a disk brake 10.6. Brake disk 10.7. Blocks of drum brakes 10.8. Main cylinder of brakes 10.9. Vacuum amplifier of brakes 10:10. Cable(s) of the emergency brake 10:11. Adjustment of the emergency brake 10:12. Mechanism of the emergency brake 10:13. Brake pedal 10:14. Braking signal switch 10:15. Hoses and lines of a hydraulic actuator of brakes 10:16. Removal of air from a hydraulic actuator of brakes + 11. Running gear + 12. Body + 13. Electric equipment + 14. Useful tips
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Prevention
It is recommended to replace the removed cylinder new or restored as in case of liquid dribble replacement of details of the old cylinder with new details from a remkomplekt does not yield positive result. As a rule, old cylinder will be strongly worn-out what it will be possible to be convinced of, having spent considerable time for its dismantling.
Main cylinder and vacuum amplifier of brakes
1. Nutritious tank 2. A tank stopper with the switch of a control lamp of level 3, 6. Vacuum hose 4. Collar 5. The backpressure valve (on models 325i) 7. Collar 8. The backpressure valve (on all models except 325i) 9. Bracket 10. Pusher fork 11. Axis 12. Nut
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13. Cover 14. Washer 15. Quencher of pulsations 16. Pusher 17. Filter 18. Sealing ring 19. Restrictive bolt 20. Main cylinder 21. Nuts of fastening of the main cylinder 22. Tank sealant 23. Collar 24. Vacuum amplifier of brakes 25. Knee |
Removal
The main cylinder with the attached vacuum amplifier take place in the left part of a motor compartment.
PERFORMANCE ORDER |
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1. To remove the main cylinder, disconnect the conducting socket (shooter from above), disconnect hydraulic actuator tubes (lower right arrow) of and turn off two bolts of fastening (lower left arrow). |
2. Remove as much as possible brake fluid from a tank. |
3. Turn off the union of tubes of a hydraulic actuator on the main cylinder, immediately muffle tubes and openings. Take tubes aside. |
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4. Disconnect sockets from the main cylinder, turn off nuts of fastening of the cylinder to the vacuum amplifier and remove the cylinder. Remove and replace a sealing ring (1). |
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Removal of air from the main cylinder
PERFORMANCE ORDER |
1. Before installation of the new or restored cylinder it needs to be pumped over on the special machine. For this purpose fix the cylinder in a vice through soft laying (otherwise the cylinder can burst!). |
2. Establish caps with a carving in openings of unions of tubes of a hydraulic actuator and slightly bring up them that through them there did not pass air. |
3. Fill a tank with brake fluid of the recommended type. |
4. Remove one of caps and enter the piston into the cylinder, having pushed it the screw-driver to remove air. |
5. Without releasing the piston, tighten a cap. |
6. Repeat the procedure until brake fluid without air bubbles does not begin to follow from an opening under the union. Constantly add brake fluid in a tank of the main cylinder. |
7. To accelerate the procedure of preliminary pumping of the cylinder it is possible to muffle an opening under the union a finger, however upon termination of the procedure tighten a cap and repeat the procedure on other opening. |
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Installation
PERFORMANCE ORDER |
1. Install the main cylinder (together with a new sealing ring) and wrap by hand fastening nuts. |
2. Turn the union of tubes of a hydraulic actuator, without making considerable efforts. |
3. Tighten everything the union and a nut of fastening with the set moment. |
4. Fill the main cylinder with liquid, then pump over it (if preliminary pumping was not carried out), pump over all hydraulic actuator. |
5. When pumping the cylinder on the car ask the assistant to press several times a pedal and to hold it in the pressed situation. Release the union to allow to leave to air and liquid, then tighten. Repeat the procedure for both unions until in brake fluid vials of air do not disappear. Check work of brakes before operation of the car. |
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