On certain fire trucks, the pitman arm may fracture under severe load caused by three loading conditions. In all cases, the front axle must be turned full left or right while: 1) simultaneously backing-up and braking hard, 2) driving one wheel over or against a curb, or, 3) steering the front axle full left or right when the vehicle is stationary. These are all low or no-speed events. Correction: Dealers will install pitman arms made of higher strength material.