- 10 mm ring key for bleed valve.
Replacement materials:
- Brake fluid according to DOT 4 specification.
Brake fluid is able to absorb moisture from the air through the pores in the brake hoses and the vent in the cover of the expansion tank. Therefore, over time, the boiling point of the brake fluid decreases. When the brakes are heavily loaded, vapor locks can form in the brake lines, which greatly impairs the operation of the brake system.
Brake fluid should be changed every 2 years, possibly in the spring.
Pay attention to the precautions for handling brake fluid.
Using a suction container, suck out the brake fluid from the expansion tank, leaving a fluid layer about 10 mm thick at the bottom of the tank.
Attention: Do not suck out all the fluid from the reservoir, otherwise air will enter the brake system.
Fill the reservoir with new brake fluid up to the MAX mark.
On the right rear disc brake caliper, put a clean transparent hose over the bleeder valve and insert it into a suitable container.
Ask an assistant to repeatedly press the brake pedal until there is a noticeable resistance to pressing. Press the pedal, at the same time open the bleed valve with the ring key -1- and allow the brake fluid to flow out through the transparent hose. When the brake pedal hits the bottom of the car, close the bleed valve and take your foot off the pedal. Continue this procedure until (about 10 times), until new fluid flows through the transparent hose. The new brake fluid has a lighter color.
Close the bleeder valve and fill the reservoir with new brake fluid.
In the same way, pump out the old brake fluid from other wheel brake cylinders, observing the following sequence: 1) rear right, 2) rear left, 3) front right, 4) front left.
Attention: The drained brake fluid must in any case be clean and free of air bubbles.
Attention: Finally, replace the brake fluid in the clutch drive in the same way. Removing air from the clutch hydraulic drive is described on p. 72.
Hand over the old brake fluid at a special point for the reception of waste fuels and lubricants.
Caution: Never store old brake fluid in drinking bottles or in places accessible to children. Danger of poisoning.