{"nhtsa_id":10020437,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2006-10-04","date":"2006-05-01","document_id":"421","mfr_campaign":null,"replaces":"421","component":"SERVICE BRAKES, AIR:SLACK ADJUSTERS:AUTOMATIC","mfr_system":null,"summary":"AUTOMATIC SLACK ADJUSTER ADJUSTMENT CAUTION. MODEL SAF-LINER C2. THOMAS BUILT BUSES. *KB","document":null,"url":"https://open.wenmarpro.com/bulletins/10020437","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"UNKNOWN","model":"UNKNOWN","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":[]}