{"nhtsa_id":10110334,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-08-04","date":"2017-04-26","document_id":"TSB170057-042620","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE; EQUIPMENT:MECHANICAL","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and resolution of the hard start or fault code 559 or 4691 caused by an air leak in fuel system caused by incorrect installation of Navistar® supplied washer between Navistar® supplied fuel inlet fitting and Cummins® supplied priming pump filter head.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10110334-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10110334-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10110334","components":[{"id":"engine","name":"Engine","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"fuel-system","name":"Fuel system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"B6.7","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS","model":"ISB6.7","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":[]}