Removing Brake Master Cylinder

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Fig 1: Identifying Brake Master Cylinder

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Fig 2: Component Overview Of Brake Master Cylinder

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Information

If the brake master cylinder is to be replaced, first remove the brake fluid reservoir and then unscrew the fastening nuts for the brake master cylinder (see "REPLACING BRAKE MASTER CYLINDER ").

Do not open the brake fluid reservoir (this makes assembly easier).
Information
- In the event of assembly work at the hydraulic connections, all electric plug connections in the area of the connection point must always be connected. This prevents the inside of the plug connections from being splashed with brake fluid or water.
- Clean any plug connections that have become dirty or damp during removal and fitting using a lint-free cloth, for example.
- Brake fluid on electrical contacts (even thinned brake fluid) leads to corrosion and may cause faults in the system.
- Remove any escaping brake fluid immediately; rinse with water and dry thoroughly if necessary.
Information
- Before disconnecting the brake lines, place a clean absorbent cloth underneath.
- Close off brake lines with a suitable plug immediately after disconnecting.
Disconnect brake lines -1- .
1. 2.1. Unscrew and remove cap screws -2- .
  
  Fig 3: Identifying Brake Lines
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. 2.2. Pull brake lines -1- out of the bores.
3. 2.3. Immediately close off brake lines -1- and bores in the brake master cylinder with suitable stoppers.
Release electric push-on connector -1- and pull it off -arrow- .
Carefully lay wiring harness -2- aside.

Fig 4: Disconnecting Electric Push-On Connector
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Screw off fastening nuts -1- for brake master cylinder -2- .

Fig 5: Identifying Brake Master Cylinder Fastening Nuts
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Carefully remove brake master cylinder -1- together with brake fluid reservoir -2- out of the brake booster -3- .

Fig 6: Removing Brake Master Cylinder From Brake Booster
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