{"nhtsa_id":10058930,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2015-12-23","date":"2015-06-12","document_id":"WC-C-1638-B","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL","mfr_system":null,"summary":"CUMMINS: ON SOME ENGINES, A NEW BYPASS VALVE IS BASED ON CUMMINS MIDRANGE DESIGN THAT SEALING CAPABILITY IS MORE EFFECTIVE AND HAS BETTER PROTECTION FOR FUEL PUMP LUBRICATED COMPONENTS. MODEL ISX12, ISX15 CM2250, ISX12, ISX15 CM2350, QSX12, QSX15 CM2250ECF, CM2350, ISXE5. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10058930","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"CUMMINS","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":[]}