Required Brake Fluid: SAE J 1703 or DOT4 specifications.
Brake fluid sucks moisture from the air through the pores in the brake hoses or the air bleed holes in the reservoir. As a result, the boiling point of the brake fluid decreases over time. Under heavy brake loads, this can lead to vaporization in the brake lines, which will significantly reduce the effectiveness of the brakes.
Brake fluid is replaced every 40,000 km, if possible in spring. When driving in mountainous areas, the brake fluid should be changed more often.
When working with brake fluid follow the rules.
Suck out the brake fluid from the reservoir to a level of 10 mm.
Caution: Do not suck out all the liquid to prevent air from entering the system.
Pour new brake fluid into the reservoir up to the "MAX" mark.
Caution: Carefully open the bleed valves on the wheel cylinders and brake calipers without unscrewing them completely. It is recommended to spray the valves with rust dissolving liquid 2 hours before unscrewing them.
Place a clean hose onto the valve of the right rear brake caliper and place a container underneath to collect the fluid.
With the help of an assistant, press the brake pedal several times until you feel resistance. Close the bleed valve if the pedal hits the floor. Remove your foot from the pedal. Repeat this procedure with each valve until new, clean brake fluid begins to flow out. New brake fluid can be recognized by its light color.
Tighten the bleed valve. Add new brake fluid to the reservoir.
Similarly, pump out the old brake fluid from the other brake calipers and wheel cylinders in the following sequence: rear right, rear left, front right, front left.
Caution: The new brake fluid that comes out must be clean and free of bubbles.
Check the pedal pressure and its distance to the floor. The distance to the floor should be at least 65 mm. If this distance is less, check the self-adjustment of the drum brake or the brake piston of the caliper for smoothness of movement.
Do not drain brake fluid into the drain.