{"nhtsa_id":10083264,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2016-10-21","date":"2014-04-30","document_id":"PI 0844","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES","mfr_system":null,"summary":"SOME MACK LEU TRUCKS WERE BUILT BETWEEN 08/15/2012–11/05/2012, WITH AN INVERSION VALVE INSTALLED INSTEAD OF A PRESSURE REDUCING VALVE FOR THE WORK BRAKE SYSTEM. THE EXISTING INVERSION VALVE (PART NUMBER 21007503) MAY CAUSE MAXIMUM BRAKE SYSTEM PRESSURE WHILE APPLYING THE TRUCK’S WORK BRAKE.","document":null,"url":"https://open.wenmarpro.com/bulletins/10083264","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"LEU","year_from":2013,"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":[]}