{"nhtsa_id":42034,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1995-11-01","date":"1995-04-01","document_id":"MAPI486","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES, AIR","mfr_system":null,"summary":"CERTAIN MACK CHASSIS EQUIPPED WITH PRUGE TYPE AIR DRYERS AND HOLSET AIR COMPRESSORS COULD POSSIBLY HAVE BEEN PLUMBED INCORRECTLY AT THE FACTORY. TO CORRECT THIS CONDITION, DEALERS ARE TO INSPECT THE AFFECTED CHASSIS AND CORRECTED AS OUTLINED IN THE INSTRUCTIONS. *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/42034","components":[{"id":"brakes","name":"Brakes","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":[]}