- Open-end wrench for air release valve.
- Brake fluid specification SAE J 1703 DOT 3 or DOT 4.
Through the pores in the brake hoses, the brake fluid absorbs moisture from the air. Because of this, the boiling point of the brake fluid decreases over time. When the brakes are heavily loaded, this causes steam bubbles to form in the brake line, which dramatically reduces braking efficiency.
It is best to replace brake fluid in the spring.
- Observe precautions when handling brake fluid, see item 18.10.
- Using a suction device, suck out the brake fluid from the reservoir to a level of approximately 10 mm.
Caution: Do not empty the tank completely to prevent air from entering the system.
- Fill the expansion tank with new brake fluid up to the MAX mark.
Caution: Open the air release valves on the wheel cylinders and brake calipers carefully so as not to twist them. It is recommended to spray them with rust solvent 2 hours before bleeding. If they cannot be released, contact a service station.
- Place a clean hose on the air release valve at the rear left wheel and place a container of appropriate capacity underneath.
- The assistant presses the brake pedal several times until the required pressure is created. Leave your foot on the pedal, open the valve. Close the valve when the pedal goes all the way down, remove your foot from the pedal. Repeat this process with each air release valve until only new brake fluid comes out. New brake fluid is lighter in color.
- Close the air release valve and fill the expansion tank with new brake fluid.
- In the same way, pump out the old brake fluid from the remaining brake calipers and wheel cylinders, in the following order: rear left, rear right, front right, front left.
Note: The flowing liquid must be clear and not contain air bubbles.