Park Brake System: Description

The park brake system consists of the following:

• Park Brake Pedal Assembly
  
  Receives and transfers park brake system apply input force from driver to park brake cable system. Releases applied park brake system when depressed again.
• Park Brake Cables
  
  Transfers input force received from park brake pedal, through park brake cable equalizer, to park brake apply lever.
• Park Brake Cable Equalizer
  
  Evenly distributes input force to both the left and right park brake units. Threaded park brake cable equalizers are also used to remove slack in park brake cables.
• Park Brake Apply Lever
  
  Multiplies and transfers input force to park brake actuator/adjuster.
• Park Brake Actuator/Adjuster
  
  Uses multiplied input force from apply lever to expand park brake shoe (rear disc, drum-in-hat system), or drum brake shoes toward the friction surface of the drum-in-hat of the rear brake rotor, or the brake drum. Threaded park brake actuators/adjusters are also used to control clearance between the park brake shoe (rear disc, drum-in-hat system), or the drum brake shoes and the friction surface of the drum-in-hat (of the rear brake rotor), or the brake drum.
• Park Brake Shoe (Rear Disc, Drum-In-Hat System)
  
  Applies mechanical output force from park brake actuator/adjuster to friction surface of the drum-in-hat (of the rear brake rotor).