1. The slave cylinder is fixed in the clutch housing with one bolt. While access is possible from the engine compartment, access is best when lifted up in front of the vehicle.
2. Loosen only the hydraulic line coupling on the slave cylinder.
3. Turn off an assembly bolt, get the working cylinder (photo).
4. Unscrew the cylinder from the pipe coupling and plug the end of the pipe.
5. Repair kits are not manufactured by Audi but can be purchased from your vehicle and parts dealer.
6. Before overhauling the working cylinder, clean the outer surfaces.
7. Remove a rubber boot, remove a pusher bar.
8. Remove the special spring clip from the cylinder socket, remove the piston and spring.
9. Clean the parts, check their condition. If the piston and bore are excessively worn or there is visible corrosion, replace the cylinder. If the parts are in good condition, remove and replace the piston seal
10. Dip the new seal into the hydraulic fluid, install it on the piston with your fingers only. Make sure the seal lip faces towards the end of the piston spring.
11. Insert the spring into the cylinder, then dip the piston into the hydraulic fluid and carefully insert it.
12. While holding the piston with a screwdriver, press the new spring clip into the cylinder bell
13. Install the push rod, then the rubber boot.
14. Installation is carried out in the reverse order. Bleed the system as described in Chapter 4. The end of the push rod that touches the release lever should be lightly lubricated with molybdenum grease. If a plastic holder ring is used, the outer surface must also be lubricated with the same lubricant.
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