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Pre-bleeding > < Bleeding brake system

Golf Mk4

Bleeding brake system with brake filling and bleeding unit VAS 5234 or V.A.G 1869
Bleeding brake system with brake filling and bleeding unit -VAS 5234- or -V.A.G 1869-
Special tools and workshop equipment required
   
t  Brake filling and bleeding unit -VAS 5234-
t  or
t  Brake filling and bleeding unit -V.A.G 1869-
  W00-1101
t  Upgrade kit for brake filling and bleeding unit -V.A.G 1869/4-
  WARNING
Ensure that a filling pressure of 1 bar is not exceeded when filling brake fluid using brake filling and bleeding unit -VAS 5234- or -V.A.G 1869-.
Therefore, the brake fluid pressure must be reduced to 1 bar on brake filling and bleeding unit -VAS 5234- or -V.A.G 1869-. ⇒ Operating instructions-VAS 5234- or -V.A.G 1869-
  Note
If, in vehicles with EDL, EDL/TCS or EDL/TCS/ESP, a chamber in brake fluid reservoir is completely empty (e.g. brake system leaking), brake system must be pre-bled first.
Special point regarding vehicles with ABS/EDL/TCS/ESP
The basic settings for brake pressure sender (Mark 20) or sender (Mark 60) must be performed after bleeding the brake system.
Connecting -VAS 5051- and selecting functions → Chapter.
Particular feature in RHD vehicles
  W00-0457
When one chamber in the brake fluid reservoir is completely empty (e.g. leaks in brake system) or on replacement of the hydraulic unit, the brake master cylinder must subsequently be bled at the bleed screws -arrows-.
  N47-0166

Pre-bleeding > < Bleeding brake system