{"nhtsa_id":10055203,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2014-04-22","date":"2014-02-01","document_id":"FSB-561-024","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS","mfr_system":null,"summary":"MACK TRUCK: THE INABILITY OF UNIT BUILDING AIR PRESSURE IS DUE TO BRASS COLLAR CRIMPED ONTO STAINLESS STEEL COMPRESSOR DISCHARGE LINE SPLITTING. MODEL LEU, MRU. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10055203","components":[{"id":"engine","name":"Engine","parent":null},{"id":"cooling-system","name":"Cooling system","parent":"engine"}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"LEU","year_from":2012,"year_to":2013,"match":null,"vehicle_ids":[]},{"make":"MACK","model":"MRU","year_from":2012,"year_to":2013,"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":[]}