{"nhtsa_id":10029365,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2009-07-08","date":"2009-04-02","document_id":"SB-535002","mfr_campaign":null,"replaces":null,"component":"PARKING BRAKE","mfr_system":null,"summary":"MACK TRUCK: A CHANGE TO PARK BRAKE VALVE USED ON CHASSIS MODEL WAS MADE, WHEREBY PARKING BRAKES AUTOMATICALLY APPLY WHEN AIR SYSTEM PRESSURE DROP-PS 59 345-414KPA(50-60 PSI). THIS A CHANGE FROM PREVIOUS CHASSIS MANUFACTURED PRIOR TO FEBRUARY 2, 2009. MODEL YEARS UNKNOWN. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10029365","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"parking-brake","name":"Parking brake","parent":"brakes"}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"LEU","year_from":2007,"year_to":2009,"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":[]}