{"nhtsa_id":601762,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1998-08-24","date":"1998-03-30","document_id":"4891","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS","mfr_system":null,"summary":"SOME VEHICLES BUILT BETWEEN OCTOBER 1, 1996 AND DECEMBER 31, 1997 WITH AD-9DI OR AD-9I EXTENDED PURGE AIR DRYERS VEHICLES MAY EXPERIENCE A STICKING PURGE VALVE. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/601762","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"brake-hose-line","name":"Brake hoses and lines","parent":"brakes"}],"codes":[],"topics":[],"vehicles":[{"make":"PETERBILT","model":"PETERBILT","year_from":1996,"year_to":1997,"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":[]}