Lucerne V8-4.6L (2008)
Brake Master Cylinder: Removal and Replacement
Master Cylinder Replacement
Master Cylinder Replacement
Caution: Refer to inBrake Fluid Irritant Caution (See: Service Precautions/Technician Safety Information/Brake Fluid Irritant Caution).
Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice (See: Service Precautions/Vehicle Damage Warnings).
Removal Procedure
1. Disconnect the electrical connector from the brake fluid level sensor.
2. Disconnect the brake pipes from the master cylinder.
Important: Install a rubber cap or plug to the exposed brake pipe fitting end in order to prevent brake fluid loss and contamination.
3. Plug the open brake pipe fitting ends.
4. Remove the 2 master cylinder mounting nuts.
5. Remove the master cylinder.
6. Remove the reservoir from the master cylinder if it is to be reused on a replacement master cylinder. Refer to Master Cylinder Reservoir
Replacement (See: Master Cylinder Reservoir Replacement).
Installation Procedure
1. Install the brake master cylinder reservoir to the master cylinder if it was removed previously. Refer to Master Cylinder Reservoir Replacement (
See: Master Cylinder Reservoir Replacement).
2. Bench bleed the master cylinder. Refer to Master Cylinder Bench Bleeding (See: Procedures/Master Cylinder Bench Bleeding).
3. Install the master cylinder to the vacuum brake booster.
Notice: Refer to Fastener Notice (See: Service Precautions/Vehicle Damage Warnings/Fastener Notice).
4. Install the 2 brake master cylinder mounting nuts.
Tighten the 2 brake master cylinder mounting nuts to 30 N.m (22 lb ft).
5. Remove the plugs from the brake pipes.
6. Install the brake pipes to the master cylinder.
