Caution: If there is air in the brake master cylinder (MBC), the air must be removed from the cylinder before releasing air from the wheel cylinders.
2. Fill the brake master cylinder reservoir with brake fluid. When bleeding the brake hydraulic system, keep the brake master cylinder reservoir at least half full of fluid.
3. Disconnect the front brake pipe from the master brake cylinder.
4. Allow the brake fluid to fill the master cylinder until it begins to flow out of the holes used to connect the front pipes.
5. Connect the front brake pipe to the brake master cylinder and tighten the brake pipes to a torque of 16 Nm.
6. Slowly press the brake pedal once and, while holding it, loosen the front brake line fastening on the master cylinder to release air from the cylinder.
7. Tighten the brake pipe to 16 Nm and slowly release the brake pedal. Wait 15 seconds before proceeding to the next step.
Note: Slowly pressing the brake pedal and pausing for 15 seconds is required to allow the portion of fluid that compensates for the loss of fluid released through the bleed valve to flow from the expansion tank into the brake cylinder cavity.
8. Repeat the above steps in the same sequence, including a 15 second break, until all air has been released from the master cylinder cavity (a sign of the end of the process: a liquid containing no air bubbles will come out from under the thread).
Note: Contact with brake fluid may cause damage to the paintwork and destruction of polymer parts of the vehicle.
9. After removing all the air from the primary piston cavity, remove the air from the secondary piston cavity.
Note: For vehicles without ABS, the sequence for bleeding air from the brake system branches is as follows:
- right rear,
- left front,
- left rear,
- right front.
10 Place a transparent tube on the valve and immerse its end in a transparent container with brake fluid.
11. Slowly press the brake pedal once and, while holding it, loosen the bleed valve on the wheel brake cylinder. This will cause fluid to flow out of the tube into the container and the brake pedal will move down.
Note: During one bleeding cycle, the amount of fluid released should correspond to no more than approximately ½-⅔ of the pedal stroke.
12. Tighten the bleed valve to 9 Nm.
13. Slowly release the brake pedal.
14. Repeat the above steps, including a 15-second pause, until clear fluid without air bubbles flows out of the tube immersed in a transparent container of brake fluid. It may be necessary to repeat these steps 10 times or more to remove all the air.
15. After removing air from the system branch, remove the tube, check the tightness of the bleed valve and install the protective cap on it.
16. Check the brake pedal for "softness" at the end of its travel. Repeat the entire procedure if the pedal is still too "soft".
Information taken from the official website «ChevyMan»