Clutch system, bleeding

WARNING: This page is about a different car, the 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary equipment required

Fig 1: Identifying Brake Filler And Bleeder Unit VAS 5234

Courtesy of VOLKSWAGEN UNITED STATES, INC.

VAS 5234 Brake filler and bleeder unit

Brake fluid specification.

Refer to 47 - BRAKES - HYDRAULIC COMPONENTS

NOTE:

Open the bleeder valve before switching on the bleeder unit.
When performing the following steps, make sure that no brake fluid escapes onto the transmission.
The clutch system must be bled after performing work on the hydraulic clutch mechanism.
Before bleeding, pull out clutch pedal and fill brake fluid reservoir with brake fluid up to "max." marking.

Connect VAS 5234 Brake filler and bleeder unit, but do not switch on at this stage.
If installed, remove noise insulation beneath transmission.

Fig 2: Connecting Bleeder Hose To Clutch Slave Cylinder

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect bleeder hose -A- to slave cylinder (arrow) and open bleeder valve.
Connect bleeder hose to pressure hose of fluid collector bottle.
Switch on the bleeder appliance and allow about 100 cm3 of brake fluid to drain out.

Working pressure 2.5 bar

NOTE: Ensure bleeder hose is correctly installed during bleeding operation.

Close bleeder valve and tighten to 4.5 Nm.
Depress clutch pedal several times after completion of bleeding process.
Bleed again if necessary.