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Servicing clutch release mechanism > < Removing and installing clutch slave cylinder (release bearing with hydraulic actuator)

A3 Mk1

Bleeding clutch system
Bleeding clutch system
Special tools and workshop equipment required
   
t  Brake charge and bleed equipment -VAS 5234-
Brake fluid specification → Brake system; Rep. Gr.47.
Procedure
  Note
t  The clutch system must be bled after performing work on the hydraulic clutch mechanism.
t  It is not necessary to pre-fill the system.
t  When performing the following steps, make sure that no brake fluid escapes onto the gearbox.
–  Pull clutch pedal back to its normal rest position.
–  Connect brake charge and bleed equipment -VAS 5234- to brake fluid reservoir (do not switch on at this stage).
–  If necessary, use bleed hose -V.A.G 1238 B/3- (670 mm) to bleed system.
–  Connect bleed hose to collector bottle of brake charge and bleed equipment -VAS 5234-.
  W00-1101
–  Connect bleed hose -V.A.G 1238 B/3- to bleeder valve -arrow-.
  Note
Ensure that bleed hose is correctly fitted during bleeding operation.
–  Open bleeder valve -arrow-.
–  Switch on bleeding equipment.
l  Operating pressure 2.0 bar
–  Bleed off about 100 cm3 of brake fluid.
–  Close bleeder valve.
–  Rapidly operate clutch pedal from stop to stop 15 times.
–  Bleed off an additional 50 cm3 of brake fluid.
–  Close bleeder valve. Tightening torque 4.5 Nm.
–  Depress clutch pedal several times after bleeding process is completed.
–  Bleed system once again if necessary.
–  Remove bleed hose and fit protective cap.
–  Remove brake charge and bleed equipment -VAS 5234- from brake fluid reservoir.
  A30-0013

Servicing clutch release mechanism > < Removing and installing clutch slave cylinder (release bearing with hydraulic actuator)