volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Unscrewing control unit from hydraulic unit > < Connecting brake lines from tandem brake master cylinder to hydraulic unit
Removing control unit and hydraulic unit
   
Removing control unit and hydraulic unit
Special tools and workshop equipment required
t  Torque wrench -V.A.G 1331-
t  Torque wrench -V.A.G 1410-
t  Brake pedal depressor -V.A.G 1869/2-

   
Sealing plugs repair kit, Part No. 1H0 698 311 A
The transport protection for the contact pins must always be placed on the hydraulic unit after the control unit has been disconnected from the hydraulic unit.
No warranty can be assumed for hydraulic units without transport protection.
1 - Transport protection for contact pins (foam)
2 - Sealing plug M10
3 - Sealing plug M12
Removing
Location:
The control unit is bolted to the hydraulic unit and is located on left in the engine compartment.
  WARNING
Do not bend the brake lines in the area of the hydraulic unit!
–  Read out and note the existing control unit code.
–  Remove air filter → Rep. gr.24
–  Remove battery → Electrical system; Rep. gr.27.
  N45-0039
–  Remove battery tray -arrows-.
–  Apply brake pedal depressor -V.A.G 1869/2-.
–  Connect bleeder bottle hose to front left brake caliper bleeder valve and rear left brake caliper bleeder valve and open bleeder valves.
–  Depress brake pedal at least 60mm using brake pedal depressor -V.A.G 1869/2-.
–  Close front left and rear left bleeder valve.
–  Do not remove brake pedal depressor -V.A.G 1869/2-.
–  Place sufficient lint-free cloths under the control unit and hydraulic unit.
Ensure no brake fluid gets onto contacts.
  A10-1572
–  First identify the two brake master cylinder brake lines -A and B- and unscrew from the hydraulic unit.
–  Immediately seal brake lines and threaded holes with seal plugs from repair set Part No. 1H0 698 311 A.
–  Identify brake lines (brake calipers) -1 to 4-, unscrew and seal.
  N45-10187
–  Release connector on control unit in -direction of arrow 1- and pull off -direction of arrow 2-.
–  Pull hydraulic unit together with control unit upwards out of the rubber dampers of the bracket.
  N45-10189

Unscrewing control unit from hydraulic unit > < Connecting brake lines from tandem brake master cylinder to hydraulic unit