{"nhtsa_id":45766,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1996-04-25","date":"1995-09-01","document_id":"BC4379950906","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES, AIR:SUPPLY:HOSES, LINES/PIPING, AND FITTINGS","mfr_system":null,"summary":"THE AIR BRAKE SYSTEM PRESSURE GAUGE P/N E7HZ-2557-A MAY LEAK AIR. THIS WAS CAUSED BY HIGH TORQUE BEING APPLIED TO THE AIR LINE NUTS DURING ASSEMBLY. IN FEBRUARY, 1995 THE INSTALLATION PROCESS WAS CHANGED TO RESOLVE THIS SITUATION. *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/45766","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"brake-hose-line","name":"Brake hoses and lines","parent":"brakes"}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"L SERIES","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":[]}