Bleeding the hydraulic clutch drive (Audi A4 B6)

In workshops, air is removed from the hydraulic clutch drive using a special device. With some skill, you can remove the air yourself and without much expense. Air is removed in much the same way as from the brake drive. In this case, it is also necessary to follow safety rules when handling toxic brake fluid. Never suck the fluid out with your mouth through a hose.

1. Place the front of the car on jack stands, remove the lower engine cover,

2. Check the level in the common brake fluid reservoir; if necessary, top up the fluid to the maximum mark.

3. Remove the cap from the air valve on the slave cylinder and one of the front wheel brakes to carefully clean the valves. Loosen the valve about one and a half turns.

4. Connect both valves with a hose.

5. Ask an assistant to slowly press the brake pedal. When the pedal is pressed all the way, close the valve on the brake. After that, you can release the pedal. In this way, pump the brake fluid from the front wheel brake through the hydraulic clutch drive. Do not press the pedal too hard, otherwise the hose may slip off.

6. Monitor the brake fluid level in the reservoir; the fluid should not fall below the minimum mark.

7. When air bubbles no longer appear in the brake fluid reservoir, having been removed from the clutch hydraulic drive, close both valves and remove the hose. The air has been removed from the hydraulic drive.

8. After removing the air, check the fluid level in the tank again.