2008 Ford Focus Brake Service (ONLINE REPAIR MANUALS)

On models with anti-lock brakes, the brake hydraulic system must be depressurized before disconnecting any hydraulic lines or fittings. Depressurize the system by pumping the brake pedal at least 25 times with the ignition in the Off position.

Crown Victoria, Fusion, Grand Marquis, Milan, MKZ, MKS, Sable, Taurus, Taurus X & Town Car

Removal

• Remove brake fluid until reservoir is half full.
• On models equipped with air suspension, turn air suspension service switch to Off position.
• On all models, raise and support front of vehicle, then remove tire and wheel assembly.
• Remove two calipe...

Master Cylinder

Crown Victoria, Grand Marquis, Mustang & Town Car

• Depress brake pedal several times to exhaust system vacuum.
• Disconnect master cylinder brake lines and electrical connectors.
• Disconnect hydraulic control unit supply hose at master cylinder. Secure hose aside.
• Remove two mounting bolts, then secure proportioning valve and tubes aside.
• Remove mounting nuts and master cylinder.
• Reverse procedure to install.

Focus

• With engine OFF, press brake pedal several times to deplete brake booster vacuum.
• Remove battery tray.
• Remove master cylinder cap, then using a suitable clean ...

Master Cylinder

Disassemble

• Clean outside of master cylinder thoroughly. Drain brake fluid from master cylinder into suitable container.
• Remove stop bolt and pressure control valves.
• Pry up and remove reservoir from master cylinder body.
• Remove fluid control valve.
• Depress primary piston and remove snap ring from retaining groove at open end of bore.
• Remove primary and secondary piston assemblies from master cylinder. If secondary piston does not come out, apply air pressure to secondary outlet port to remove.

Inspection

• Wash components in clean brake fluid only. Use an air hose to bl...

Hydraulic & Electronic Control Unit

The ABS control module and hydraulic unit are integrated into one assembly. The unit consists of an aluminum block of solenoid valves, pump motor and ABS control module.

The ABS control module continuously monitors and compares wheel speed information for each wheel. When the module determines that a wheel lockup is going to occur, brake pressure is modulated to the appropriate wheel. Brake pressure modulation is achieved by the hydraulic control unit opening and closing appropriate solenoid valves. When the affected wheel returns to normal speed, s...

Service Brakes

These models are equipped with self adjusting brake mechanisms and require no adjustment. The brakes are adjusted as required whenever the service brakes are applied.

Parking Brake

• Remove clip and parking brake boot.
• Ensure rear brakes are not hot when adjusting.
• Release parking brake to its lowest position.
• Remove clip and loosen parking brake cable adjustment nut until there is no tension in cable.
• Apply and release brake pedal to ensure brakes are adjusted correctly.
• Raise and support vehicle.
• Ensure parking brake cable is correctly routed in its clips.
• Lower vehicle.
• Raise p...

Pressure bleeding is recommended for all hydraulic brake systems. Ensure all dirt and contaminants are removed from master cylinder area prior to removing reservoir cap.

To prevent air from the pressure tank getting into the lines, do not shake the tank while air is being added to the tank or after it has been pressurized. Set the tank in the required location, bring the air hose to the tank, and do not move it during the bleeding operation. The tank should be kept at least one-third full.

On vehicles equipped with disc brakes and master cylinders without proportioners or press...