{"nhtsa_id":620761,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-08-29","date":"2001-06-29","document_id":"SB215017","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN","mfr_system":null,"summary":"ON CERTAIN MODEL CHASSIS EQUIPPED WITH KYSOR FAN DRIVES, THE AIR LINE THAT RUNS FROM THE FAN DRIVE CONTROL VALVE TO THE FAN DRIVE MAY BE SEVERED BY THE ENGINE FAN BLADES. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/620761","components":[{"id":"engine","name":"Engine","parent":null},{"id":"cooling-fan","name":"Cooling fan","parent":"engine"},{"id":"cooling-system","name":"Cooling system","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CH","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"MACK","model":"CX","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":[]}