{"nhtsa_id":10201947,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-10-05","date":"2021-09-23","document_id":"21 PBK","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES, AIR","mfr_system":null,"summary":"Safety Recall – Certain Model 520 trucks may have been built without a quick release (QR) valve. The absence of this valve could affect rear brake timing on certain vehicles equipped with a tri-drive or liftable tag axle and Dual Seated or Right Hand Stand-Up steering configurations. Vehicles will be inspected and, if necessary, a QR valve will be installed.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201947-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201947-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10201947","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PETERBILT","model":"520","year_from":2019,"year_to":2021,"match":"exact","vehicle_ids":["2019_peterbilt_520","2020_peterbilt_520","2021_peterbilt_520"]}],"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":[]}