Western Star · Canada · High
Western Star 4800: Brakes
Affects Western Star 4800 · 1988–1996 — about 206 vehicles.
The hazard
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.
What to do
Contact your dealer; the remedy details were not included in the filing.