{"nhtsa_id":610465,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2000-05-02","date":"1999-11-26","document_id":"99WS001","mfr_campaign":null,"replaces":null,"component":"STEERING:HYDRAULIC POWER ASSIST SYSTEM","mfr_system":null,"summary":"CONCERNS WITH THE DRIVE GEARS FOR POWER STEERING ASSIST PUMPS FAILING ON VEHICLES WITH CAT 3406E ENGINES AND VICKERS V20F PUMPS. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/610465","components":[{"id":"steering","name":"Steering","parent":null},{"id":"power-steering","name":"Power steering","parent":"steering"}],"codes":[],"topics":[],"vehicles":[{"make":"WESTERN STAR","model":"WESTERN STAR","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}