Brakes and Traction Control: Description and Operation

Brake System

The braking system on the E-Series vehicle consists of the following components:
- An electronic Hydraulic Control Unit (HCU)
- Vacuum booster power booster (E-150 to E-350)
- A Hydro-Boost power booster (E-450 only)
- Master cylinder
- Front brake discs
- Rear brake discs
- Parking brakes
- 4-Wheel Anti-Lock Brake System (4WABS)

The significant features of the brake system are as follows:
- All vehicles are equipped with rear disc brakes.
- All vehicles have front disc brakes.
- The parking brake is foot-operated and, on the E-150, E-250 and E-350, uses a drum-in-hat brake system. The E-450 is equipped with a transmission-mounted parking brake.
- The brake hydraulic system is split front and rear at the brake master cylinder.
- The brake power assist is vacuum-operated on the E-150, E-250 and E-350.
The E-450 is equipped with a Hydro-Boost power brake booster powered by the power steering pump.
- All vehicles are equipped with a 4-Wheel Anti-Lock Brake System (4WABS).