Required brake fluid: Specification SAE J 1703 or DOT4.
Brake fluid sucks moisture out of the air through the pores in the brake hoses or the reservoir's air outlets. As a result, the boiling point of the brake fluid decreases over time. If the brakes are heavily loaded, this can lead to vaporization in the brake lines, which will significantly reduce the effectiveness of the brakes.
The brake fluid is changed every 40,000 km, if possible in the spring. When driving in mountainous terrain, the brake fluid should be changed more frequently.
When working with brake fluid follow the rules.
Suck out the brake fluid from the reservoir to a level of 10 mm.
Attention: Do not suck out the liquid completely, so that air does not get into the system.
Pour new brake fluid into the reservoir up to the mark «MAX».
Caution: Carefully open the bleed valves on the wheel cylinders and on the brake calipers without unscrewing them completely. It is recommended to spray the valves with a rust dissolving liquid 2 hours before turning them off.
Attach a clean hose to the right rear brake caliper valve and place a container to collect the fluid.
With the help of an assistant, press the brake pedal several times until resistance is felt. Close the bleed valve if the pedal hits the floor. Take your foot off the pedal. Repeat this procedure with each valve until new clean brake fluid begins to pour out. New brake fluid can be recognized by its light color.
Tighten the bleed valve. Top up the reservoir with new brake fluid.
Similarly, pump out the old brake fluid from other brake calipers and wheel cylinders in the sequence: rear right, rear left, front right, front left.
Caution: New brake fluid that flows out must be clean and free of bubbles.
Check the pedal pressure and its distance from the floor. The distance to the floor must be at least 65 mm. If this distance is less, check the self-adjustment of the drum brake or caliper brake piston for smooth running.
Do not drain brake fluid down the drain.