{"nhtsa_id":10083064,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2016-10-20","date":"2015-05-28","document_id":"FSB 284-057","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"HIGH SOOT OUTPUT. ON COLD START UP IN AMBIENT TEMPERATURES OF -4°C (25°F) OR LESS, MACK ENGINES MAY EXPERIENCE ROUGH RUNNING AT LOWER THAN NORMAL BASE IDLE SPEED. UNDER THESE CONDITIONS, EXCESSIVE SOOT IS BEING PRODUCED BY THE ENGINE AND MAY RESULT IN DPF CLOGGING AT A VERY RAPID RATE.","document":null,"url":"https://open.wenmarpro.com/bulletins/10083064","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CHU","year_from":2015,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"CXU","year_from":2015,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"GU","year_from":2015,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"LEU","year_from":2015,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"MRU","year_from":2015,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"TD","year_from":2015,"year_to":2016,"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":[]}