FREIGHTLINER recall on B2 SCHOOL BUS CHASSIS and C2 SCHOOL BUS models

On certain vehicles, inconsistent actuation of the park brake relay valve may cause delayed park brake application. At higher vehicle loads, a bus may roll if the driver releases the service brakes before the parking brakes fully apply. A moving bus may cause a vehicle crash or injure passengers entering or leaving the bus. Correction: Dealers will install a check valve to reduce the park brake application time by adding an exhaust path around the relay valve.