Brake Master Cylinder: Service and Repair

Brake Master Cylinder - Gasoline Engine





Removal and Installation

NOTE: Vacuum boost shown, Hydro-Boost(R) similar.









WARNING: Do not use any fluid other than clean brake fluid meeting manufacturer's specification. Additionally, do not use brake fluid that has been previously drained. Following these instructions will help prevent system contamination, brake component damage and the risk of serious personal injury.

WARNING: Carefully read cautionary information on product label. For EMERGENCY MEDICAL INFORMATION seek medical advice. In the USA or Canada on Ford/Motorcraft products call: 1-800-959-3673. For additional information, consult the product Material Safety Data Sheet (MSDS) if available. Failure to follow these instructions may result in serious personal injury.

NOTICE: Do not spill brake fluid on painted or plastic surfaces or damage to the surface may occur. If brake fluid is spilled onto a painted or plastic surface, immediately wash the surface with water.

All vehicles

1. With the engine off, press the brake pedal several times to discharge the booster.

2. Remove the Air Cleaner (ACL) element. For additional information, refer to Intake Air Distribution and Filtering Diagrams.

3. Remove the 2 bolts and position the degas bottle assembly aside.
- To install, tighten bolts to 19 Nm (168 lb-in).





4. Disconnect the brake fluid level switch electrical connector.

5. If equipped, disconnect the trailer brake control transducer electrical connector.

6. Disconnect the brake tubes from the master cylinder.
- To install, tighten to 25 Nm (18 lb-ft).

Vehicles with vacuum boost

7. NOTE: The brake master cylinder nuts are a torque-prevailing type and cannot be reused.

Remove and discard the brake master cylinder nuts, then remove the brake master cylinder.

- To install, tighten to 23 Nm (17 lb-ft).

Vehicles with Hydro-Boost(R)

8. Disconnect the power steering line from the power steering line bracket.

9. NOTE: The brake master cylinder nuts are a torque-prevailing type and cannot be reused.

Remove the power steering line bracket/master cylinder nut and position the bracket aside by first sliding it forward and then pivoting it to the side.

- Discard the nut.

- To install, tighten to 30 Nm (22 lb-ft).

10. NOTE: The brake master cylinder nuts are a torque-prevailing type and cannot be reused.

Remove the remaining brake master cylinder nut and the brake master cylinder.

- Discard the nut.

- To install, tighten to 30 Nm (22 lb-ft).

All vehicles

11. To install, reverse the removal procedure.
- Bleed the brake system. For additional information, refer to Brake System - General Information Brake System Bleeding.