{"source":"nhtsa","country":"us","campaign":"84V035000","date":"1984-03-23","owner_notified":null,"manufacturer":"MACK TRUCKS, INCORPORATED","component":"SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE","summary":"A MANUFACTURING ERROR RESULTED IN THE INSTALLATION OF CARBON STEEL SPRINGS IN SOME DUAL-COMPARTMENT AIR RESERVOIR CHECK VALVES. CARBON STEEL SPRINGS ARE INADEQUATE FOR THIS APPLICATION BECAUSE THEY ARE SUBJECT TO SEVERE CORROSION AND SUBSEQUENT FAILURE OF THE CHECK VALVE.","consequence":null,"remedy":"THE CARBON STEEL SPRING WILL BE REPLACED WITH A STAINLESS STEEL ONE.","notes":"VEHICLE DESCRIPTION: HEAVY TRUCKS.SYSTEM: SERVICE BRAKES; DUAL COMPARTMENT AIR RESERVOIR CHECK VALVE.CONSEQUENCES OF DEFECT: IF THIS CHECK VALVE FAILURE WERE COMBINED WITH ASEVERED LINE IN THE PRIMARY AIR SYSTEM, COMPLETE LOSS OF BRAKES AND POSSIBLEVEHICLE CRASH COULD OCCUR.","mfr_campaign":null,"part_number":null,"units":850,"completion":null,"do_not_drive":false,"park_outside":false,"notification":null,"french":null,"vehicles":[{"year":1982,"make":"MACK","model":"MH","vehicle_id":"1982_mack_mh","match":"exact","built_from":"1982-04-01","built_to":"1983-11-01"},{"year":1983,"make":"MACK","model":"MH","vehicle_id":"1983_mack_mh","match":"exact","built_from":"1982-04-01","built_to":"1983-11-01"}],"may_apply":true,"as_of":"2026-10-19","lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null},"attribution":[],"url":"https://open.wenmarpro.com/recalls/nhtsa/84V035000"}