{"nhtsa_id":10163079,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-07-22","date":"2019-03-01","document_id":"L1231 Rev C","mfr_campaign":null,"replaces":null,"component":"SUSPENSION","mfr_system":null,"summary":"Operation Name: Hendrickson Trailer Commercial Vehicle Systems Document Name: Specifications - ULTRAA-K Slider Suspension Systems; UTKNT 40K Summary: This document provides specifications for Hendrickson ULTRAA-K UTKNT 40K slider suspension systems.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10163079-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2019/MC-10163079-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10163079","components":[{"id":"suspension","name":"Suspension","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HENDRICKSON","model":"HENDRICKSON","year_from":null,"year_to":null,"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":[]}