Warning! Hydraulic fluid is toxic; if it gets on your skin, wash it off immediately with soap and water. If the liquid gets inside your body or into your eyes, seek medical attention immediately. Some liquids are flammable and can ignite when they come into contact with hot objects. When working with hydraulic fluids, treat them like gasoline - take fire safety measures. Hydraulic fluid is a good paint solvent and can damage plastic parts. If you spill the liquid, wash it off immediately with plenty of water. Finally, the liquid is hygroscopic (absorbs moisture from the air) - Old fluids may become unusable due to long-term storage. When refilling or replacing fluid, always use the recommended type of fluid from a freshly opened sealed container.
1. Normal operation of the hydraulic clutch is possible only after removing air from all components of the circuit; this is achieved by bleeding the system. The presence of air in the system is characterized by a soft pedal and difficult gear shifting.
2. The design of the system does not allow bleeding in the usual way - by pressing the clutch pedal. To remove all the air from the system, it is necessary to use a special device for bleeding, which can be purchased relatively inexpensively.
3. The equipment for bleeding the system under pressure must be connected to the reserve tank in accordance with the manufacturer's instructions. The system is bled through the bleed nipple mounted on the slave cylinder, which is located on top of the transmission bellhousing. Access can be improved by raising the front of the car and installing safety stands. If necessary, remove the lower engine cover.
4. The system is bled until bubbles stop coming out of the nipple. After this, the nipple must be screwed in and the device must be removed from the car.
5. Check the clutch operation. If there is air left in the system, repeat the bleeding.
6. Any fluid drained from the system must be disposed of, even if it appears clean. Hydraulic fluid is hygroscopic and can cause corrosion of hydraulic cylinders, leading to premature wear and damage to seals.
[The original article is available on the online resource AudiManual.ru]