{"nhtsa_id":11022749,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-09-05","date":"2025-08-30","document_id":"TSB250073","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"This Technical Service Bulletin describes the verification and resolution steps for the cooling package assembly of the C500D6RE and C1000D6RE trailered generator sets which may include an over-constrained radiator core, resulting in cracking of the radiator core and subsequent coolant leaks. This is an update to a previously submitted communication.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11022749-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11022749-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11022749","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"C1000D6RE","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CUMMINS POWER GENERATION","model":"C500D6RE","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":[]}