{"nhtsa_id":10032312,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2010-03-04","date":"2008-01-11","document_id":"SC-334","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE","mfr_system":null,"summary":"MACK TRUCK: IT HAS BEEN DETERMINED THAT THE 90 DEGREE SINGLE CHECK VALVE FITTING MANUFACTURED BY PARKER HANNIFIN CORP. WHICH IS USED IN THE SUPPLY PORT OF THE SPRING BRAKE MODULATING RELAY VALVE (BENDIX SR 7 VALVE) MAY HAVE A DEFECT WHEREBY THE VALVE BODY RETAINER MAY BECOME EXCESSIVELY WORN AND EVENTUALLY BREAK APART. MODELS CXU, CXP, CXN, CHU, CHN, GU, CTP, CT, CV, MRU, AND LEU. 1/1/04-11/3/05 AND 5/2/07-7/26/07. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10032312","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CHN","year_from":2004,"year_to":2005,"match":"exact","vehicle_ids":["2004_mack_chn","2005_mack_chn"]},{"make":"MACK","model":"CHN","year_from":2007,"year_to":2007,"match":"exact","vehicle_ids":["2007_mack_chn"]},{"make":"MACK","model":"CHU","year_from":2007,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CT","year_from":2004,"year_to":2005,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CT","year_from":2007,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CTP","year_from":2007,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CV","year_from":2004,"year_to":2005,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CV","year_from":2007,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CXN","year_from":2004,"year_to":2005,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CXN","year_from":2007,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CXP","year_from":2007,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CXU","year_from":2007,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"GU","year_from":2007,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"LEU","year_from":2007,"year_to":2007,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"MRU","year_from":2007,"year_to":2007,"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":[]}