Expedition 4WD V8-4.6L SOHC VIN W (1999)
Brake Pedal Assy: Description and Operation
The brake pedal is connected to the power brake booster, which is connected to the brake master cylinder. The brake pedal is adjustable, either
non-memory or memory is available. When the brake pedal is depressed, brake fluid is pushed from the master cylinder through the metal tubing and
flexible hoses to the rear disc brake calipers and the front disc brake calipers. The brake fluid enters the rear disc brake calipers, forcing the rear disc
brake caliper pistons outward against the brake pads. The brake pads press against the braking surface on the brake discs. The front disc brake caliper
pistons are forced outward against the brake pads, and contact the braking surface of the brake discs and hub. When the brake pedal is released, the
pressure is relieved, returning the brake caliper pistons and the brake shoes and linings to the unapplied position.
The dual brake system is split front and rear with the front wheel brakes comprising one circuit and the rear wheel brakes, the other circuit.
The ability of a brake system to stop the vehicle is dependent on the available traction.
