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12:25. Removal of air from the brake system

Removal of air from the brake system

 4, 5, 7 and 8 – deaerators of the brake system

It is necessary to delete air after each repair connected with opening of system.

REMOVAL OF AIR WITHOUT SPECIAL EQUIPMENT

Removal of air from the pump with the electric drive

PERFORMANCE ORDER
1. To fill a broad tank.
2. To disconnect a hose of food of low pressure and to connect when brake fluid begins to follow from it (to substitute capacity).
3. To check whether deaerators (4) and (5) of the hydraulic device and a bolt of discharge are well screwed up.
4. To open deaerators (7) and (8) of the hydraulic device, unscrewing them on 1 turn.
5. To press softly a brake pedal against the stop.
6. To include ignition for actuating of the pump with the electric drive.
7. To switch off ignition 30 seconds later.
8. To weaken pressing a brake pedal.
9. To close deaerators (7) and (8).

Removal of air from the hydraulic device

PERFORMANCE ORDER
1. To connect deaerators (4) and (5) to the capacities containing a small amount of brake fluid.
2. To press a pedal of a brake and to open the deaerator (4), and then to close it.
3. To weaken pressing a pedal and to repeat these actions of 10 times.
Prevention

For deaerators (7) and (8) there is no need of connection of a tube of removal of air. Removal of air happens through an internal contour.
4. To open deaerators (4) and (5) to start operation of the pump with the electric drive.
5. To include ignition.
6. To close deaerators when brake fluid begins to follow without air bubbles, and then to wait to a pump stop with the electric drive.
Prevention

During these actions it is necessary to check and fill surely amount of brake fluid in a broad tank for avoidance of a zavozdushivaniye of system.
7. To remove air from supports of forward and back wheels.

Removal of air from supports

PERFORMANCE ORDER
1. To include ignition.
2. To connect deaerators of four supports to capacities.
3. To press with small effort to a brake pedal.
4. To open one of deaerators and to close it when brake fluid begins to follow pure and without air bubbles.
5. This operation should be executed for other deaerators.
6. To switch off ignition.
7. To lower pressure, turning off a discharge bolt on 1/2 turns.
8. To screw up a discharge bolt.
9. To softly press a brake pedal.
10. To open the deaerators (4) and (5) connected to capacities.
11. To close deaerators.
12. To weaken pressing a brake pedal.
13. To repeat these actions several times, having convinced that brake fluid follows without vials of air.
14. To check screwing up of deaerators.
15. To check quality of the performed operation.

REMOVAL OF AIR BY MEANS OF THE SPECIAL EQUIPMENT

PERFORMANCE ORDER
1. To study the instruction for installation and service of the device.
2. To reduce pressure in a hydraulic contour. For this purpose it is necessary to unscrew a bolt of discharge of knot of the pump with the electric drive.
3. By means of the device for removal of air to create pressure in a contour.
4. To remove air from supports.
5. To connect deaerators (4) and (5) of hydraulic knot to capacities.
6. To open deaerators (4) and (5).
7. To close deaerators when brake fluid begins to follow without air bubbles.
8. To screw up a discharge bolt.
9. To disconnect the device for removal of air.
10. To open the deaerators (4) and (5) connected to capacities.
11. To include ignition for involvement of the pump with the electric drive.
12. To close deaerators (4) and (5) when brake fluid begins to follow without air bubbles.
13. To switch off ignition.
14. To reduce hydraulic pressure, unscrewing a discharge bolt on 1/2 turns.
15. To screw up a discharge bolt.
16. To press softly a brake pedal.
17. To open the deaerators (4) and (5) connected to capacities.
18. To close deaerators.
19. These operations should be performed several times, having convinced that brake fluid follows without vials of air.
20. Several times to perform the same operations for deaerators (7) and (8).
21. To check screwing up of all deaerators.
22. To check quality of the executed operation.

Quality check of the executed operation on removal of air from a hydraulic contour

PERFORMANCE ORDER
1. On each deaerator of supports of forward brakes to install the manometer.
2. To include ignition for involvement of knot of the pump with the electric drive.
3. To open deaerators of manometers.
4. With small effort to press a brake pedal.
5. To close deaerators when brake fluid begins to follow without vials of air.
6. To reduce hydraulic pressure, unscrewing a discharge bolt on 1/2 turns. To screw up a discharge bolt.
7. To press a brake pedal against the stop. Pressure has to make 6,0 MPas.
8. If this size is not reached, it is necessary to remove air from a contour.
9. To disconnect manometers and to remove air from supports of forward brakes.

Check of level of brake fluid

PERFORMANCE ORDER
1. To include ignition for involvement of knot of the pump with the electric drive.
2. To wait until the pump with the electric drive stops the work.
3. To switch off ignition.
4. To check whether reaches the level of brake fluid in a tank of the sign designating the maximum level.
5. In case of need add amount of liquid.