{"nhtsa_id":10086623,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2016-12-20","date":"2015-06-16","document_id":"C1638B","mfr_campaign":null,"replaces":null,"component":"FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP","mfr_system":null,"summary":"THIS CAMPAIGN IS TO REPLACE THE LUBRICATING OIL FILTER BYPASS VALVE. THE NEW BYPASS VALVE DESIGN HAS MORE EFFECTIVE SEALING CAPABILITY AND PROVIDES BETTER PROTECTION TO FUEL PUMP LUBRICATED COMPONENTS. THIS IS A REVISION TO A PREVIOUS COMMUNICATION.","document":null,"url":"https://open.wenmarpro.com/bulletins/10086623","components":[{"id":"fuel-system","name":"Fuel system","parent":null},{"id":"fuel-pump","name":"Fuel pump","parent":"fuel-system"}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"ISX12","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS","model":"ISX15","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":[]}