Brake Master Cylinder: Service and Repair
Brake Master Cylinder
Removal and Installation
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.
1. Disconnect the brake fluid level warning switch electrical connector.
2. NOTICE: The vacuum must be relieved in the brake booster before the master cylinder is removed. Failure to relieve the vacuum will result in the O-ring being drawn into the brake booster.
NOTE: If the O-ring is drawn into the brake booster and cannot be recovered, a new brake booster must be installed.
Remove the check valve from the brake booster to relieve the vacuum.
3. Disconnect the wiring retainer clip from the brake booster stud.
4. Disconnect the 2 brake tube fittings.
- Plug the tubes and the brake master cylinder ports.
- To install, tighten the secondary brake tube fitting to 18 Nm (159 lb-in) and tighten the primary brake tube fitting to 25 Nm (18 lb-ft).
5. Remove the 2 brake master cylinder nuts and the brake master cylinder.
- To install, tighten to 18 Nm (159 lb-in).
6. To install, reverse the removal procedure.
- Bleed the master cylinder before installation. For additional information, refer to Brake System - General Information Component Bleeding for Component Bleeding.