{"nhtsa_id":10054127,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2013-12-21","date":"2013-10-01","document_id":"PI-0833","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE","mfr_system":null,"summary":"MACK: TRUCKS WITHOUT HAND CONTROL VALVES, WERE BUILT WITH DOUBLE CHECK VALVE INSTALLED TO TRACTOR PROTECTION VALVE (TPV) AND DUE TO MISBUILD, DOUBLE CHECK VALVE NEEDS REMOVING FOR PROPER OPERATION OF BRAKE SYSTEM. MODEL 2013 CHU, CXU GU. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10054127","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CHU","year_from":2013,"year_to":2013,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"GRANITE (GU)","year_from":2013,"year_to":2013,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"PINNACLE (CXU)","year_from":2013,"year_to":2013,"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":[]}