HME is recalling certain model year 2012 Spectr Fire Apparatus, Spectr Chassis, and 2011-2012 Ferrara Intruder Ember Chassis vehicles manufactured January 26, 2011, through November 7, 2012. These vehicles have axles are equipped with an MGM Type 24 J-series piston parking brake chamber. In the affected axles, the brake chambers may leak pressure allowing the parking brake to drag when it is supposed to be released. Brake dragging could lead to overheated brake components.