It is recommended to use a special device for pumping hydraulic actuators under pressure, for example «ARC 50». If not, you can bleed the brake system by depressing the brake pedal. In this case, an assistant is needed. The efficiency of this method is lower, and labor costs are greater than when using a special installation.
When bleeding the brake system, keep an eye on the presence of fluid in the reservoir, avoiding exposing its bottom.
Before proceeding with pumping, eliminate the influence of the vacuum booster by pressing the brake pedal several times.
Remove air first from one circuit, then from another, starting each time with the wheel farthest from the master cylinder, observing the following sequence: brake cylinders of the right rear, left rear, right front and left front wheels.
Add brake fluid to the reservoir to the correct level.
Remove the protective caps from the air outlet fittings. Clean the fitting from dust and dirt.
On disc brake mechanisms, put a transparent tube on the head of the upper fitting, and lower its free end into a vessel partially filled with clean brake fluid. Loosen the fitting 1/4 turn. After that, the assistant should slowly press the brake pedal and slowly release it, while the liquid, together with air, will be forced out of the system through the hose into the vessel. Repeat this process until bubbles stop coming out and clear fluid comes out of the hose. Hold the pedal down and tighten the air outlet tightly. Remove the hose and put the protective cap on the fitting.
Repeat the operations, unscrewing the lower fittings one by one, and you must start with the inner fitting.
Repeat operations for other wheels.
Removal of air from the drum brakes of the rear wheels is carried out in the usual way.
After pumping, restore the level of brake fluid in the reservoir if necessary.