During pumping of the brake system, monitor the presence of fluid in the tank, preventing its bottom from being exposed.
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.
Top up the brake fluid and the reservoir to the correct level.
Remove the protective caps from the air outlet fittings. Clean the fitting from dust and dirt.
Put a transparent tube on the head of the brake fitting of the right rear wheel, and lower its free end into a vessel filled with ⅓ clean brake fluid. Depress the brake pedal to pressurize the brake gas system. If no resistance is felt when depressing the pedal, depress it slowly and without interruption until depressing does not require any effort. Loosen the fitting ½ turn with the pedal depressed to the full. 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 no more bubbles come out and clear fluid comes out of the hose, keep the pedal depressed and tighten the air outlet fitting tightly. Remove the hose and put on the fitting a protective cap.
Repeat operations for other wheels.
After pumping, restore the level of brake fluid in the reservoir if necessary. Do not use the fluid drained from the system to fill the reservoir, as it is saturated with air, contains a lot of moisture and may be contaminated.
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