Since the clutch hydraulic system is powered by brake fluid, you must read the contents of the relevant section "Bleeding the brake system".
Raise the front of the car.
Check the brake fluid level in the expansion tank. If necessary, add fluid up to the mark "max".
Remove the boot from the air release valve and the hydraulic actuator.
Carefully loosen and slightly tighten the bleeder valve.
Attach a transparent hose to the release valve at the slave cylinder.
Lower the free end of the hose into a vessel half-filled with brake fluid. The end of the hose must be below the liquid level.
Slowly press the clutch pedal several times with the help of an assistant.
Depress the pedal and unscrew the bleeder valve until brake fluid flows out of the hose. Then close the valve.
Release the pedal. Press it again and leave it in that position. Open the air release valve and close it again. Repeat this process several times until there are no air bubbles in the escaping brake fluid. Keep adding brake fluid to the expansion tank.
Remove hose from hydraulic cylinder. Install the boot on the valve.
Top up the brake fluid in the expansion tank.
Make a test drive and check the operation of the clutch. Gears should shift smoothly and easily. Otherwise, repeat the bleed operation, or check for any other malfunctions that prevent the clutch from working.