{"nhtsa_id":11013834,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-02-06","date":"2021-03-09","document_id":"SC-20-127","mfr_campaign":"SC-20-127","replaces":null,"component":"SERVICE BRAKES","mfr_system":null,"summary":"Transit bus repair to the air dryer governor switch due to the original not performing as well with the environmental expose.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-11013834-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-11013834-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11013834","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PROTERRA","model":"CATALYST","year_from":2017,"year_to":2020,"match":null,"vehicle_ids":[]},{"make":"PROTERRA","model":"ZX5","year_from":2019,"year_to":2019,"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":[]}