{"source":"nhtsa","country":"us","campaign":"89V178000","date":"1989-10-23","owner_notified":"1989-11-10","manufacturer":"MACK TRUCKS, INCORPORATED","component":"SERVICE BRAKES, AIR:CONTROLS:FOOT CONTROL/VALVE","summary":"INTERNAL COMPONENTS OF THE E-12 DUAL CIRCUIT AIR BRAKE VALVES MAY BE MISASSEMBLED SO THAT ONE OF THE TAPERED SNAP RINGS IS UPSIDE DOWN.","consequence":"THE SNAP RING CAN COME OUT CAUSING THE VALVE TOMALFUNCTION AND APPLY THE TRUCK'S BRAKE SYSTEM WITHOUT WARNING; THIS COULDRESULT IN LOSS OF CONTROL AND A CRASH.","remedy":"REPLACE MISASSEMBLED VALVES.","notes":"SYSTEM: AIR BRAKE VALVES.VEHICLE DESCRIPTION: TRUCKS","mfr_campaign":null,"part_number":null,"units":3652,"completion":null,"do_not_drive":false,"park_outside":false,"notification":null,"french":null,"vehicles":[{"year":1989,"make":"MACK","model":"CH","vehicle_id":"1989_mack_ch","match":"exact","built_from":"1988-11-01","built_to":"1989-10-01"}],"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/89V178000"}