{"nhtsa_id":10173210,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-04-03","date":"2020-03-24","document_id":"20PBB","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES, AIR:SUPPLY:QUICK RELEASE VALVE","mfr_system":null,"summary":"Safety Recall: Peterbilt has decided that certain Model 320 and 520 trucks built between 2/20/2015 and 7/16/2019 may have been built without a quick release 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. Resolutoin is to inspect for a quick release valve installed, and if there is not one, to install a quick release valve.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10173210-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10173210-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10173210","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PETERBILT","model":"320","year_from":2016,"year_to":2020,"match":"exact","vehicle_ids":["2016_peterbilt_320","2017_peterbilt_320","2018_peterbilt_320","2019_peterbilt_320","2020_peterbilt_320"]},{"make":"PETERBILT","model":"520","year_from":2016,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"PETERBILT","model":"520","year_from":2017,"year_to":2020,"match":"exact","vehicle_ids":["2017_peterbilt_520","2018_peterbilt_520","2019_peterbilt_520","2020_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":[]}