{"nhtsa_id":11013416,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-02-03","date":"2021-10-25","document_id":"SC-21-124","mfr_campaign":"SC-21-124","replaces":null,"component":"SUSPENSION","mfr_system":null,"summary":"Transit bus repair to the Hadley ride height adding a check valve to the exhaust side of the the interlock valve.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-11013416-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-11013416-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11013416","components":[{"id":"suspension","name":"Suspension","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PROTERRA","model":"CATALYST","year_from":2019,"year_to":2020,"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":[]}