{"nhtsa_id":622258,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-10-16","date":"2001-08-17","document_id":"SB137011","mfr_campaign":null,"replaces":"SB137011","component":"STRUCTURE:FRAME AND MEMBERS","mfr_system":null,"summary":"IN CERTAIN SEVERE APPLICATION SUCH AS COAL FIELDS, SOME REFUSE AND OTHER TYPES OF HEAVYLOAD, ON / OFF ROAD OPERATIONS, THE STANDARD 44,000 LB TRUNNION BRACKETS MAY DEVELOP CRACKS IN THE BOTTOM PLATE ACROSS THE BRACKET ON ALL EXCEPT CH AND CL MODELS. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/622258","components":[{"id":"structure-body","name":"Body and frame","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"MACK","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":[]}