{"nhtsa_id":601439,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1998-08-04","date":"1998-04-15","document_id":"4231","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:COOLING SYSTEM","mfr_system":null,"summary":"CONDITION WITH INCORRECT HIGH WATER TEMPERATURE WARNING SWITCH INSTALLED ON '98 CAT 3406E ENGINES. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/601439","components":[{"id":"engine","name":"Engine","parent":null},{"id":"cooling-system","name":"Cooling system","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"KENWORTH","model":"KENWORTH","year_from":1997,"year_to":1998,"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":[]}