{"nhtsa_id":10186129,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-02-01","date":"2020-12-17","document_id":"FDM-TSIB-018","mfr_campaign":null,"replaces":null,"component":"STEERING","mfr_system":null,"summary":"This bulletin provides instruction to update the hydraulic steering system by adding an external pressure relief valve. Field reports of failed steering pump seals led to testing that determined internal recirculation of hot oil was the cause of the seal failures.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10186129-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10186129-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10186129","components":[{"id":"steering","name":"Steering","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"OSHKOSH","model":"S-SERIES","year_from":2020,"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":[]}