Since the hydraulic clutch uses brake fluid, you must also read the relevant instructions in the chapter "Brake system".
Caution: When bleeding the system as described here without the appropriate device, some air may remain in the system. This can be detected by scratching sounds and improper disengagement of the clutch. In this case, the system must be bled immediately in a workshop using the appropriate device.
Raise the car.
Remove the lower engine compartment cover.
Check the brake fluid level in the common expansion tank and top up to the MAX mark if necessary.
Remove the dust caps from the air bleed valve "arrow" on the working cylinder. Put a transparent hose on the air bleed valve located on the working cylinder.
Carefully open the air bleed valve. To avoid damaging the hexagon of the bolt, use a ring spanner to open it.
Place the free end of the hose in a container with brake fluid to prevent air from being sucked in during the removal process.
Ask an assistant to press the clutch pedal all the way down about 10 times and then hold it down.
In this position, open the air bleed valve so that the brake fluid flows out of the system into the container. If it is clear that no more air bubbles are coming through the hose into the container with the flowing fluid, close the air bleed valve.
Caution: The fluid level in the expansion tank should not drop too low; if necessary, top up the level with new brake fluid.
Release the clutch pedal and press it all the way down 10 times, hold it down and open the air bleed valve. Repeat this process until no more air bubbles come into the container through the hose. Constantly top up the level in the expansion tank with new brake fluid.
Close the air bleed valve on the clutch slave cylinder, remove the hose from it and put on the dust cap.
Lower the car.
Top up the fluid level in the expansion tank to the MAX mark.
Check the functioning of the brake system and clutch.
Removal air using a special device
In the workshop, air is removed from the clutch hydraulic drive, as a rule, using an air removal device. The device creates pressure in the brake fluid.
Unscrew the cap of the brake fluid expansion tank. Remove the float chamber.
Connect the air removal device according to the instructions.
Place the hose on the clutch slave cylinder bleed valve. Insert the other end of the hose into the filled (not to the very top) bottle of brake fluid.
Open the air release valve and keep it open until the release of air bubbles in the bottle stops.
Remove the air bleeder.
Slowly press the clutch pedal all the way down 10 times and slowly release it.
Take off slave cylinder from gearbox, without disconnecting the pipelines.
Open the air bleed valve. Press the working cylinder rod until it stops releasing air bubbles. The air bleed valve should be facing upwards. Close the air bleed valve and slowly release the working cylinder rod.
Put the float chamber back in place. Fill the fluid level in the expansion tank to the MAX mark. Screw on the cap of the brake fluid expansion tank.
Install the fine air filter housing in place.
Install the lower engine compartment cover.