{"nhtsa_id":627640,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-02-13","date":"2001-10-01","document_id":"4627","mfr_campaign":null,"replaces":null,"component":"STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID","mfr_system":null,"summary":"ON SOME VEHICLES, THE BLUE URETHANE END CAPS ON SOME POWER STEERING FILTERS MAY DETERIORATE IF EXPOSED TO SPECIFIC CHEMICAL COMPOUNDS, NEW AND IMPROVED STEERING FILTER END CAPS HAVE BEEN IMPLEMENTED. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/627640","components":[{"id":"steering","name":"Steering","parent":null},{"id":"power-steering","name":"Power steering","parent":"steering"}],"codes":[],"topics":[],"vehicles":[{"make":"FREIGHTLINER","model":"ARGOSY","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"FREIGHTLINER","model":"BUSINESS CLASS","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"FREIGHTLINER","model":"CENTURY","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"FREIGHTLINER","model":"COLUMBIA","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"FREIGHTLINER","model":"FLD","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":[]}