Removing Brake Booster

Information 

• During assembly work on hydraulic connections, the electric plug connections on the hydraulic unit must always be connected. This prevents the plug connections on the hydraulic unit or in the connector inside from being splashed with brake fluid or water. 
• Damp connectors must be wiped dry before disconnection. 
• Brake fluid on electrical contacts (even thinned brake fluid) causes corrosion and can result in faults in the system. 

Information 

• Close off the brake lines using suitable stoppers. 
• Place a cloth under the brake booster to soak up emerging brake fluid. 

Fig 1: Identifying Installation Position Of Brake Booster

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1. Brake booster

Fig 2: Identifying Brake Booster Components

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1. Carefully pull the vacuum line -1-  out of the brake booster -2-  .
   Fig 3: Identifying Vacuum Line On Brake Booster

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2. Lever the push rod out of the brake pedal using the release tool T10189  . → 460519 REMOVING AND INSTALLING BRAKE PEDAL
3. Remove fastening nuts -1-  from the brake booster under the dashboard.
   Fig 4: Removing Brake Booster Fastening Nuts

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   Information 

   Make sure not to damage the push rod boot when removing the brake booster.

   The seal between the brake booster and body must always be replaced.

4. Remove the brake booster.
   1. 4.1. Hold brake lines aside carefully  ahead of the brake booster.
   2. 4.2. Carefully remove the brake booster from the engine compartment.