Bleeding the brake system (VW Golf 1)

After all repair work has been completed, the hydraulic system must be bled. The workshop uses a special device for this purpose.

The pumping sequence is: rear right, front left, rear left and finally front right.

When performing ventilation, the safety cap is removed from the bleed valve (2). The transparent hose (3) is placed on the valve. The other end of the hose is lowered into a glass container (4), partially filled with brake fluid. Then the valve is opened with the key (1)

Tank (it is located directly on the master cylinder) fill with fresh brake fluid. During bleeding, you must constantly add fluid, otherwise air will be sucked in from the empty tank.

Remove the rubber cap from the bleed valve; clean the valve hole.

Place the transparent hose on the valve; insert the free end into a glass container partially filled with brake fluid.
Loosen the valve 1-1.5 turns.

Have your assistant press the brake pedal slowly. This will force the brake fluid and any air in it out of the cylinder. You can see air bubbles in the transparent hose and in the glass container.

Then close the valve. Have an assistant hold the pedal down.

Let the pedal slowly move back.

This process is repeated until no more air comes out. The person who is bleeding and the person who is pressing the pedal must agree on when the pedal is pressed and when the valve is closed.

Keep the brake pedal fully depressed until the valve is completely tightened.

Bleeding of other wheel brakes is carried out in a similar manner.