The 152 is also fitted with a parking brake system. Few locomotives have been converted to dual brake system. The mechanical parts of the brake system were supplied by Faiveley Transport. A wheel cylinder is a component of a hydraulic drum brake system. The brake system was supplied by Faiveley. Brake system actuation mechanisms are either mechanical or hydraulic. The mechanical advantage of the lever depends on the brake system design. The original underframe, bogies, traction motors and brake system will be retained and overhauled. Miles experiences brake failure and has his brake system replaced during his pit stop. These mechanical parts contained around the wheels are controlled by the air brake system. One more important change added to this loco was the inclusion of Blended Brake System. The GTS was fitted with the optional 14-inch Baer front brake system. The system also incorporated a brake system fault telltale on the dashboard. The Westinghouse air brake system is very trustworthy, but not infallible. Doors repeatedly stuck, and the brake system could not be trusted.