- Ring wrench for unscrewing the bleed valve.
- Transparent plastic hose with an inner diameter of 6 mm and a container for collecting brake fluid.
Warning: Do not reuse used brake fluid.
Warning: Take precautions when handling brake fluid, refer to subsection Brake fluid.
Brake fluid absorbs moisture through the pores of the brake hoses and the reservoir vent. As a result, during operation, the boiling point of the liquid decreases. If the brakes are heavily loaded, this can even lead to vaporization, which reduces the effectiveness of the brakes.
Brake fluid should be changed every 2 years, preferably in spring. With frequent movement in mountainous areas, the fluid must be changed more often.
At service stations, air from the brake system is usually removed using a special device. However, this can be done without the use of this device. In this case, the brake system is pumped by the brake pedal. This requires the participation of an assistant.
Warning: If in the process of removing air from the brake system, the fluid level drops sharply, then air is sucked into the ABS pump. In this case, the removal of air must be carried out at the service station using a special device. When replacing any brake hose, the air from the system must also be removed at the service station. Until this is done, you can not use the car.
Air removal sequence:
1. Caliper rear right
2. Caliper rear left
3. Caliper front right
4. Caliper front left
Order of execution
1. Mark the brake fluid level on the reservoir with a felt-tip pen. After replacing the fluid, restore the previous level. Thus, the overflow of the system with liquid when replacing the brake pads will be excluded.
2. Remove the brake fluid reservoir cap.
Warning: It is not possible to suck the brake fluid out of the reservoir with a single bottle, as there is a hard-wired mesh in the filler pipe.
3. Cars with manual transmission: Since the clutch actuator runs on brake fluid, bleed the clutch actuator, while referring to subsection Removing air from the hydraulic clutch drive system.
Warning: When bleeding the clutch slave cylinder, at least 100 cm3 must be deflated (0.1 l) brake fluid to replace the fluid with a new one.
4. Fill the reservoir with new brake fluid up to the MAX mark.
5. Carefully open the bleed fittings without unscrewing them. It is recommended that the fittings be sprayed with a rust remover 2 hours prior to venting. If the fittings do not turn away, it is recommended to perform this operation at a service station.
6. Put a clean transparent hose on the fitting of the right rear caliper and substitute an appropriate container. To be able to access the fitting, you must either remove the wheel or raise the car or install it above the inspection hole.
7. Place the manual transmission in neutral position, tighten the parking brake. Start the engine and let it idle.
8. Ask an assistant to press the brake pedal several times, creating pressure in the system. Keep the pedal depressed. Using a wrench 1, open the bleed valve on the right rear caliper. Close the choke when the pedal hits the floor. Take your foot off the pedal.
9. Vehicles with manual transmission: With the engine running, pump out the brake fluid until it reaches the level of the clutch connection in the reservoir (arrow). Do not allow the liquid level to drop too much, otherwise air may enter the system through the reservoir. Be sure to add only new fluid to the system.
10. Close the fitting.
11. Cars with a manual transmission: Since the clutch actuator runs on brake fluid, remove air from the actuator, while referring to subsection Removing air from the hydraulic clutch drive system.
Warning: To change the brake fluid in the clutch actuator, at least 100 cm3 must be pumped out of the actuator hydraulic cylinder (0.1 l).
12. Fill the reservoir with new brake fluid up to the MAX mark.
13. Drain the old brake fluid from the other calipers in the sequence - rear right, rear left, front right, front left.
Warning: Draining brake fluid must be clean and free of air bubbles. About 250 cm3 of fluid must be pumped out of each caliper.
14. Depress the brake pedal and check for free play. It should not exceed 1/3 of the pedal travel.
15. Fill the reservoir with brake fluid to the pre-existing level.
16. Screw the cap onto the tank.
Attention, carry out a reliability check:
- Are the brake lines and hoses secured?
- Are the brake hoses in holders?
- Are the bleed fittings tight?
- Is there sufficient fluid in the system?
17. With the engine running, check the system for leaks. To do this, press the brake pedal about 10 times with a force of 200 - 300 N (corresponds to 20 – 30 kg). The brake pedal must not move back. Check all connections for tightness.
18. In conclusion, check the operation of the brakes on a road with light traffic. To do this, you must make at least one strong braking, checking the action of the ABS (a sign of ABS operation is the pulsation of the brake pedal when braking).
Warning: Be aware of traffic following your vehicle. The effect of ABS is best seen on unpaved roads.
Warning: Do not dispose of brake fluid with household waste or elsewhere. Local authorities must inform about brake fluid collection points.
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