Econoline E550 V10-6.8L VIN S (2003)
Vacuum Brake Booster: Service and Repair
Brake Booster - Vacuum
Removal
1. Disconnect the battery ground cable.
2. Depress the brake pedal to release vacuum from the power brake booster.
3. Remove the coolant reservoir bolts and position reservoir aside.
4. NOTE: Discard the master cylinder retaining nuts. They are torque prevailing and cannot be reused.
Remove the brake master cylinder.
5. Disconnect the power brake booster check valve.
6. Remove the stoplight switch self-locking pin.
7. Slide the stoplight switch and booster push rod and bushing off the brake pedal pin.