{"nhtsa_id":612121,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2000-06-06","date":"1999-09-01","document_id":"SF189A","mfr_campaign":null,"replaces":null,"component":"PARKING BRAKE:CONVENTIONAL:MECHANICAL","mfr_system":null,"summary":"FIELD SERVICE MODIFICATION TO REMOVE THE EXISTING PARK BRAKE QUICK RELEASE VALVE AND REPLACE IT WITH A NEW VALVE ON FS65 SCHOOL BUS CHASSIS MANUFACTURED PRIOR TO JUNE 24, 1999. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/612121","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"parking-brake","name":"Parking brake","parent":"brakes"}],"codes":[],"topics":[],"vehicles":[{"make":"FREIGHTLINER","model":"FREIGHTLINER","year_from":null,"year_to":null,"match":"exact","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":[]}