{"nhtsa_id":10083663,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2016-10-28","date":"2013-10-29","document_id":"PI 0833","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL; SERVICE BRAKES","mfr_system":null,"summary":"SOME UNITS WITHOUT HAND CONTROL VALVES HAVE BEEN BUILT WITH A DOUBLE CHECK VALVE INSTALLED TO THE TPV. THIS IS A MISBUILD AND THE DOUBLE CHECK VALVE NEEDS TO BE REMOVED FOR PROPER OPERATION OF THE TRAILER BRAKE SYSTEM.","document":null,"url":"https://open.wenmarpro.com/bulletins/10083663","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CHU","year_from":2014,"year_to":2014,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CXU","year_from":2014,"year_to":2014,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"GU","year_from":2014,"year_to":2014,"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":[]}