{"nhtsa_id":629391,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-04-02","date":"2002-02-26","document_id":"637019","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT:APPLIANCE:AIR CONDITIONER","mfr_system":null,"summary":"SUBJECT REGARDING AIR CONDITIONER EXPANSION VALVE INTERFERENCE WITH CYLINDER HEAD, 612 MODELS.*JB","document":null,"url":"https://open.wenmarpro.com/bulletins/629391","components":[{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"CH","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"MACK","model":"CX","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":[]}