{"nhtsa_id":54490,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1998-04-20","date":"1997-10-31","document_id":"97103198K297","mfr_campaign":null,"replaces":null,"component":"STEERING","mfr_system":null,"summary":"VARIOUS INFORMATION ON HYDRAULIC/AIR CONTROL CIRCUITS FOR THE MS DUAL-STEER CHASSIS. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/54490","components":[{"id":"steering","name":"Steering","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"MID-LINER","year_from":1990,"year_to":1990,"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":[]}