{"nhtsa_id":10030577,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2009-10-23","date":"2009-07-15","document_id":"SB-214064","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL","mfr_system":null,"summary":"MACK TRUCK: DISCHARGE RECIRCULATION VALVE (DRV) AIR LINE SERVICE KIT 21377589 HAS BEEN DEVELOPED FOR THE REPAIR OR REPLACEMENT OF DRV AIR LINE ON MACK MP7 ENGINES. IF THE DPF (DIESEL PARTICULATE FILTER) FAILED REGENERATION DUE TO SLOW T1 TEMPERATURE RISE DURING ACTIVATION OF DRV, THERE MAY BE AN ISSUE WITH A BROKEN DRV LINE. NO MODEL OR MODEL YEARS LISTED. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10030577","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"MACK","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":[]}