WESTERN STAR issued a recall on the 4800 model

Note: certain trucks equipped with Westport WS-16 front axles with Eaton ES 16.5 X 5 or 16.5 X 6 brakes. In these combinations the front brake return spring contacts the hub after about 20% wear of the brake shoes. Further wear of the brake material will lead to wear of the return spring and the spring may eventually fail prematurely. Pieces of the failed spring may then lodge in the brake cam causing either the affected brake to stay applied when the other brakes have been released, or stopping the affected brake from applying when the other brakes are applied. Either of these scenarios may cause the vehicle to be pulled in a lateral direction off the road or into on-coming traffic. Correction: Front brakes will be modified by installing horse collar/double return spring kits.