Caution: If brake fluid gets into your eyes, rinse them immediately with water and consult a doctor.
1. Bleeding the system is necessary to remove air that has entered the system during dismantling and assembling components of the hydraulic part of the brakes.
2. If the brake pipe was disconnected only from the wheel, only that brake caliper or wheel cylinder needs to be bled.
3. If the tubes were disconnected from the master cylinder, the entire system needs to be bled.
4. Release the vacuum from the brake booster by pressing the brake pedal several times with the engine off.
5. Remove the brake reservoir cap and fill it with brake fluid.
Caution: Monitor the fluid level in the reservoir during the bleeding procedure. Do not allow the fluid to drain completely from the reservoir.
6. To do this, you will need a clean container partially filled with brake fluid, a reserve of brake fluid for topping up, a sufficiently long rubber or vinyl hose with an internal diameter of about 5 mm, a key for unscrewing the bleed nipple and an assistant.
7. Start working with the left front wheel. Slightly loosen the bleed nipple, tighten it and check the ease of rotation of the nipple when unscrewing and screwing.
8. Place the hose on the bleed nipple and immerse the other end in a container with brake fluid.
Fig. 10.8 Preparation for bleeding the brake system circuit
9. The assistant should press the brake pedal several times and hold it in the lower position after you feel resistance from the pressure.
10. With the pedal pressed, unscrew the bleed nipple so that the liquid flows through the hose. Wait until all the air bubbles come out, tighten the nipple.
11. Repeat steps 9 and 10 until no more air bubbles come out of the tube. Tighten the bleeder screw and move to the right rear wheel, then the right front wheel, and finally the left rear. Check the fluid level in the brake reservoir regularly.
12. Do not use the brake fluid collection container to top up the fluid.
13. Add fluid to the reservoir at the end of the bleeding operation.
14. Check the operation of the brakes: the pedal should be "hard" at the end of the braking stroke.