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Home >> Audi >> 2004 >> A8 >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake System >> 47 - Brakes - Hydraulic components >> Brake master cylinder, removing and installing >> Brake master cylinder, removing and installing

Brake master cylinder, removing and installing

Special tools, testers and auxiliary items required 

Fig 1: Brake Filler And Bleeder Unit VAS 5234
GW00001319Courtesy of VOLKSWAGEN UNITED STATES, INC.

Removing 

Extract brake fluid using brake filler/bleeder unit VAS 5234 

Fig 2: Opening Brake Fluid Reservoir
GW00006898Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 3: Extracting Brake Fluid Using Brake Filler And Bleeder Unit VAS 5234
GW00006899Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 4: Location Of Brake Fluid Level Warning Switch F34 And Vacuum Hose
GW00006900Courtesy of VOLKSWAGEN UNITED STATES, INC.

Tower brace, removing 

Fig 5: Cylinder Combi-Bolts, Front Part Of Plenum Chamber & Suspension Strut Mounting Socket
GW00029456Courtesy of VOLKSWAGEN UNITED STATES, INC.

- Arrow  - on illustration points in direction of travel.

Fig 6: Cylinder Combi-Bolts, Suspension Strut Socket Cross Brace, Front Window Cross Brace & Window Cross Brace Connecting Piece Support
GW00029457Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 7: Brake Fluid Reservoir Bolt
GW00029458Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
  • Protect plenum chamber from escaping brake fluid.
  • Brake fluid reservoir is engage in master brake cylinder on bottom side.
Fig 8: Brake Booster Bolts, Brake Lines & Brake Master Cylinder Bolts
GW00029459Courtesy of VOLKSWAGEN UNITED STATES, INC.

Installing 

When installing, observe the following: