Brake Fluid Level - Check
The brake fluid expansion tank is made of transparent material and the brake fluid level can be checked easily and quickly. The brake fluid level should be near the MAX mark. To replenish the amount of liquid in the tank, you must remove the cap and fill in the liquid. The manufacturer recommends using DOT4 fluid.
Brake Fluid - Change
Brake fluid should be changed every two years or at 60,000 km. Brake fluid is a mixture of ethylene glycol, polyester oxyethylene and some other ingredients. This colorless or yellowish liquid is poisonous and also aggressive to paintwork. It does not attack metal and rubber parts and retains sufficient fluidity even at -40°C. Its boiling point is also quite high - about 290°C.
However, brake fluid is hygroscopic and «absorbs» moisture, which simultaneously lowers its boiling point. With a moisture content of 2.5%, the boiling point is only 150°C. This is quite dangerous, given that the brakes are subjected to significant stress. Moisture in such cases evaporates, forming air pockets in the hoses and pipelines of the brake system. The brake pedal in such cases fails and the brakes do not work. In this case, the brake system must be bled.
11. Take the brake fluid out of the reservoir, leaving a layer of fluid about 1 cm thick in it.
12. Fill with fresh DOT 4 brake fluid.
13. Unscrew the bleed valves on the brake mechanisms of the wheels one by one and bleed the system, each time making at least 10 full pressures on the brake pedal.
14. Monitor the level of brake fluid in the reservoir and top up if necessary so that the reservoir does not empty and air is not pumped into the system.
Start bleeding from the fitting of the brake mechanism of the right rear wheel.