2. You may need to bleed all four brakes if air has entered the system due to low fluid levels, or if the brake lines have been disconnected from the master cylinder.
3. If the brake line going to the wheel was disconnected, bleed the brake on that wheel.
4. If the connection between the brake pipe and the flexible hose was disconnected, bleed this circuit of the brake system.
5. If the master cylinder has been removed from the vehicle, follow the Chapter 8 and pump the cylinder on the workbench before installing it.
6. If the master cylinder is installed on the vehicle without pre-bleeding, bleed it first (points 7-16 below), and only then proceed to bleeding the working brake cylinders and calipers.
7. Relieve the vacuum in the brake booster unit by applying the brake several times with the engine off.
8. Remove the master cylinder reservoir cap and fill the reservoirs with brake fluid. Replace the cover. Remember to monitor the fluid level in the reservoirs during bleeding; do not allow the reservoirs to empty, otherwise you will have to repeat the bleeding.
9. Disconnect the front brake line from the master cylinder.
10. Allow the brake fluid to fill the master cylinder passage until it starts to flow out of the front pipe connection hole. Prepare a container and rag to collect any leaking liquid.
11. Connect the front brake line to the master cylinder.
12. Ask an assistant to press the brake pedal very slowly (just once) and hold it in the lower position.
13. Loosen the connection of the front brake pipe to the master cylinder to allow air to escape from the cylinder. Tighten the connection, then have an assistant slowly release the brake pedal.
14. Wait 15 seconds (very important).
15. Repeat the steps, including a 5-second break, until all air has been removed from the connection hole.
16. Bleed the rear channel in the same way.
17. Before bleeding the wheel cylinders or calipers, see points 7 and 8.
18. You will need brake fluid, an empty transparent container, a plastic or rubber tube that fits tightly onto the bleed nipple, a wrench, and the help of an assistant. The vehicle will probably need to be jacked up and supported on axle stands.
19. Starting with the right rear wheel, loosen the bleed screw slightly, then tighten it again, but so that it can be loosened quickly and easily.
20. Place the end of the tube on the fitting and immerse the other end in the brake fluid poured into the container.
21. Ask an assistant to press the brake pedal several times (to create pressure in the system), and then press the pedal all the way down and hold it in this position.
22. When the pedal is pressed all the way, open the nipple slightly. Bubbles will come out of the end of the tube immersed in the container. When the flow of liquid slows down (in 2-3 seconds), close the valve again and ask the assistant to release the pedal.
23. Repeat the steps described in steps 21 and 22 until the liquid coming out of the tube is free of air bubbles. Press the release valve and repeat the same procedures on the left rear wheel, then on the right front wheel and finally on the left front wheel. Monitor the fluid level in the master cylinder reservoirs.
24. Never reuse old brake fluid because, having been exposed to the open air, it has absorbed atmospheric moisture, which will impair the performance of the brakes.
25. Finally, fill the master cylinder.
26. If you experience any difficulties while bleeding the system, purchase a pressure bleeding kit. Connect the kit to the system according to the instructions and bleed the brakes in the sequence indicated above.