{"vehicle":{"id":"1983_mack_mh","year":1983,"make":"Mack","model":"MH"},"may_apply":true,"as_of":{"us":"2026-10-19","ca":"2026-10-19"},"recalls":[{"source":"tc","country":"ca","campaign":"1988131","date":"1988-09-20","manufacturer":null,"component":"Seats And Restraints","summary":"THE SEAT TETHER BELTS ON MODELS EQUIPPED WITH AIR RIDE SEATS MAY NOT HAVE BEEN ADJUSTED DURING ASSEMBLY. DURING AN IMPACT CONDITION, THE DRIVER AND/ OR RIDER COULD MOVE FORWARD AND POSSIBLY STRIKE THE WINDSHIELD, EVEN WHEN WEARING A SEAT BELT. THERE WOULD BE NO PRIOR WARNING.\nCORRECTION: VEHICLES WILL BE INSPECTED AND TETHER BELT WILL BE ADJUSTED IF NECESSARY.","mfr_campaign":"SC199","units":1342,"do_not_drive":null,"park_outside":null,"notification":"Safety Mfr","match":"exact","models":["MH"],"built_from":null,"built_to":null,"url":"https://open.wenmarpro.com/recalls/tc/1988131"},{"source":"nhtsa","country":"us","campaign":"88V147000","date":"1988-09-06","manufacturer":"MACK TRUCKS, INCORPORATED","component":"SEAT BELTS","summary":"SEAT TETHER BELTS MAY NOT HAVE BEEN ADJUSTED DURING ASSEMBLY.","mfr_campaign":null,"units":11000,"do_not_drive":false,"park_outside":false,"notification":null,"match":"exact","models":["MH"],"built_from":"1982-01-01","built_to":"1988-07-01","url":"https://open.wenmarpro.com/recalls/nhtsa/88V147000"},{"source":"tc","country":"ca","campaign":"1987015","date":"1987-02-09","manufacturer":null,"component":"Suspension","summary":"NOTE: 1971 TO 1987 TRUCKS WITH NEWAY AIR RIDE DRIVE AXLE SUSPENSION. THE CHANNEL TYPE CROSSMEMBER INSTALLED WITH THE SUSPENSION CAN BE OVERSTRESSED AND CAN FAIL. THE BROKEN CROSSMEMBER CAN PROTRUDE ABOVE THE TOP OF THE FRAME AND INTERFERE WITH THE TRAILER CHASSIS COMPONENTS. THIS COULD ADVERSELY AFFECT HANDLING WHEN TURNING. ALSO, A COMPLETELY SEPARATED CROSSMEMBER WITH ATTACHED HEIGHT CONTROL VALVES COULD AFFECT THE HEIGHT OF THE SUSPENSION AIR SPRINGS. THE RESULTING LEAN COULD CAUSE LOSS OF CONTROL.","mfr_campaign":"SC183","units":1134,"do_not_drive":null,"park_outside":null,"notification":"Safety Mfr","match":"exact","models":["MH"],"built_from":null,"built_to":null,"url":"https://open.wenmarpro.com/recalls/tc/1987015"},{"source":"tc","country":"ca","campaign":"1986010","date":"1986-01-22","manufacturer":null,"component":"Structure","summary":"THE CAB STEPS COULD DEVELOP CRACKS IN THE WELDED AREA WHICH COULD EXTEND INTO THE TUBULAR STEP AND CAUSE THE TUBULAR STEP TO COLLAPSE AND EVENTUALLY BREAK WITHOUT WARNING TO THE USER, WITH POSSIBLE INJURIES BEING RECEIVED.  TRUCKS EQUIPPED WITH SLEEPER CABS.","mfr_campaign":"SC174","units":377,"do_not_drive":null,"park_outside":null,"notification":"Safety Mfr","match":"exact","models":["MH"],"built_from":null,"built_to":null,"url":"https://open.wenmarpro.com/recalls/tc/1986010"},{"source":"nhtsa","country":"us","campaign":"86V008000","date":"1986-01-17","manufacturer":"MACK TRUCKS, INCORPORATED","component":"STRUCTURE","summary":"LEFT OR RIGHT CAB STEP MAY CRACK IN ITS WELDED AREA DUE   TO FLEXING OF THE STEP DURING ENTERING AND EXITING.                                                                                                               CONSEQUENCE OF DEFECT: AS THE CRACKS EXTEND, THE TUBULAR STEP COULD PARTIALLY    COLLAPSE AND BREAK WITHOUT WARNING TO THE USER, AND COULD RESULT IN PERSONAL     INJURIES.","mfr_campaign":null,"units":7000,"do_not_drive":false,"park_outside":false,"notification":null,"match":"exact","models":["MH"],"built_from":"1982-04-01","built_to":"1986-03-01","url":"https://open.wenmarpro.com/recalls/nhtsa/86V008000"},{"source":"nhtsa","country":"us","campaign":"85V113000","date":"1985-09-17","manufacturer":"MACK TRUCKS, INCORPORATED","component":"SERVICE BRAKES, AIR","summary":"THE DUAL DOUBLE CHECK VALVE MAY NOT RELEASE THE PROPER    AIR VOLUME TO THE BRAKE SYSTEM, CAUSING A SLIGHT TIMING DELAY BETWEEN THE        TRACTOR AND THE TRAILER BRAKE SYSTEM.                                                                                                                             CONSEQUENCES OF DEFECT: IF THE BRAKES ARE SUDDENLY APPLIED, THE TRAILER COULD    JACKKNIFE WITHOUT WARNING TO THE OPERATOR, WHICH COULD RESULT IN A VEHICLE       CRASH.","mfr_campaign":null,"units":5020,"do_not_drive":false,"park_outside":false,"notification":null,"match":"exact","models":["MH"],"built_from":"1982-01-01","built_to":"1984-12-01","url":"https://open.wenmarpro.com/recalls/nhtsa/85V113000"},{"source":"tc","country":"ca","campaign":"1985102","date":"1985-09-13","manufacturer":null,"component":null,"summary":"WHEN THE TRACTOR BRAKES ARE APPLIED, THE TRAILER BRAKES MAY NOT REACT SIMULTANEOUSLY WITH THE TRACTOR.  THIS CONDITION IS DUE TO TO A VALVE NOT RELEASING PROPER AIR VOLUME TO THE BRAKE.","mfr_campaign":"SCI69","units":186,"do_not_drive":null,"park_outside":null,"notification":"Safety Mfr","match":"exact","models":["MH"],"built_from":null,"built_to":null,"url":"https://open.wenmarpro.com/recalls/tc/1985102"},{"source":"tc","country":"ca","campaign":"1985052","date":"1985-05-01","manufacturer":null,"component":null,"summary":"IT IS POSSIBLE THAT THE FLIP-OUT STEP ON THE BUMPER MAY FAIL SUDDENLY UNDER THE WEIGHT OF A PERSON STANDING ON THE STEP WHILE SEVICING THE FRONT AREA OF THE VEHICLE.  THIS BREAK WILL CAUSE THE PERSON STANDING ON THE STEP TO FALL WITHOUT WARNING POSSIBLY RESULTING IN PERSONAL INJURY.","mfr_campaign":"SC165","units":256,"do_not_drive":null,"park_outside":null,"notification":"Safety Mfr","match":"exact","models":["MH"],"built_from":null,"built_to":null,"url":"https://open.wenmarpro.com/recalls/tc/1985052"},{"source":"nhtsa","country":"us","campaign":"85V051000","date":"1985-05-01","manufacturer":"MACK TRUCKS, INCORPORATED","component":"STRUCTURE:BODY:BUMPERS","summary":"THE FLIP OUT STEP CLEVIS ON THE BUMPER MAY FAIL AND       BREAK UNDER THE WEIGHT OF THE PERSON STANDING ON THE STEP TO SERVICE THE FRONT   AREA OF THE VEHICLE.                                                                                                                                              CONSEQUENCE OF DEFECT: THIS SUDDEN BREAK WILL CAUSE THE PERSON STANDING ON THE   STEP TO FALL, WITHOUT WARNING, AND COULD RESULT IN INJURIES.","mfr_campaign":null,"units":7500,"do_not_drive":false,"park_outside":false,"notification":null,"match":"exact","models":["MH"],"built_from":"1982-04-01","built_to":"1985-04-01","url":"https://open.wenmarpro.com/recalls/nhtsa/85V051000"},{"source":"tc","country":"ca","campaign":"1984146","date":"1984-11-20","manufacturer":null,"component":null,"summary":"THE SPRING CENTER BOLT HEAD DOES NOT PENETRATE THROUGH THE CASTER WEDGE AND INTO THE RECESSED HOLE IN THE AXLE PAD, THEREFORE, NOT LOCATING AND ALIGNING THE SPRING TO THE FRONT AXLE.  IF THE FRONT AXLE CLIPS LOOSEN, THE LACK OF CENTER BOLT PENETRATION THROUGH THE CASTER PLATE MAY RESULT IN AXLE MISALIGNMENT, AXLE SHIFTING AND LOSS OF STEERING CONTROL.","mfr_campaign":"SC162","units":97,"do_not_drive":null,"park_outside":null,"notification":null,"match":"exact","models":["MH"],"built_from":null,"built_to":null,"url":"https://open.wenmarpro.com/recalls/tc/1984146"},{"source":"nhtsa","country":"us","campaign":"84V140000","date":"1984-11-07","manufacturer":"MACK TRUCKS, INCORPORATED","component":"TRAILER HITCHES:FIFTH WHEEL ASSEMBLY","summary":"DUE TO IMPROPER AND INADEQUATE WELDING PRACTICES, THE FIFTH WHEEL ON THE INVOLVED VEHICLES IS DEFECTIVE. FRAME MOUNTED SUPPORTS MAY HAVE INCOMPLETE OR POOR QUALITY WELDS. THE WELDS COULD SUBSEQUENTLY FAIL ALLOWING SEPARATION OF THE TRACTOR FROM THE TRAILER.","mfr_campaign":null,"units":64,"do_not_drive":false,"park_outside":false,"notification":null,"match":"exact","models":["MH"],"built_from":"1984-05-01","built_to":"1985-03-01","url":"https://open.wenmarpro.com/recalls/nhtsa/84V140000"},{"source":"tc","country":"ca","campaign":"1984052","date":"1984-04-05","manufacturer":null,"component":null,"summary":"A CARBON STEEL CHECK VALVE SPRING WAS MISTAKENLY INSTALLED IN THE DUAL COMPARTMENT AIR RESERVOIR.  USAGE OF CARBON STELL SPRINGS IN THIS APPLICATION CAN RESULT IN SEVERE CORROSION AND SUBSEQUENT FAILURE.  IF A LEAK DEVELOPS IN THE PRIMARY AIR SYSTEM, AIR WOULD NOT BE CHECKED OR ISOLATED FROM THE FAILED SYSTEM AND AIR WOULD FLOW FROM THE SECONDARY SYSTEM AND EXHAUST AT THE POINT OF LEAKAGE RESULTING IN LOSS OF SERVICE BRAKES AND APPLICATION OF THE EMERGENCY SPRING BRAKES.  IF THE DRIVER IGNORES THE LOW AIR PRESSURE WARNING LIGHT AND BUZZER AND FAILS TO PULL OFF THE ROAD, THE POSSIBILITY EXI","mfr_campaign":"SC155","units":38,"do_not_drive":null,"park_outside":null,"notification":null,"match":"exact","models":["MH"],"built_from":null,"built_to":null,"url":"https://open.wenmarpro.com/recalls/tc/1984052"},{"source":"tc","country":"ca","campaign":"1984046","date":"1984-03-27","manufacturer":null,"component":null,"summary":"IT IS POSSIBLE THAT IMPROPER STEERING SHAFT CLAMP BOLTS WERE INSTALLED AND TORQUED TO THE WRONG SPECIFICATIONS.  BECAUSE OF THE OVERLOADED CLAMPING FORCE APPLIED TO THE BOLT, THE BOLT COULD FAIL ALLOWING THE STEERING YOKE TO BECOME LOOSE.  THIS COULD RESULT IN COMPLETE LOSS OF STEERING WITHOUT PRIOR WARNING AND A POSSIBLE VEHICLE CRASH.","mfr_campaign":"SC157","units":210,"do_not_drive":null,"park_outside":null,"notification":null,"match":"exact","models":["MH"],"built_from":null,"built_to":null,"url":"https://open.wenmarpro.com/recalls/tc/1984046"},{"source":"nhtsa","country":"us","campaign":"84V035000","date":"1984-03-23","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.","mfr_campaign":null,"units":850,"do_not_drive":false,"park_outside":false,"notification":null,"match":"exact","models":["MH"],"built_from":"1982-04-01","built_to":"1983-11-01","url":"https://open.wenmarpro.com/recalls/nhtsa/84V035000"},{"source":"nhtsa","country":"us","campaign":"84V033000","date":"1984-03-22","manufacturer":"MACK TRUCKS, INCORPORATED","component":"STEERING: STEERING WHEEL/HANDLE BAR","summary":"IMPROPER STEERING CLAMP BOLTS AND TORQUE APPLIED DURING INSTALLATION. THE BOLT COULD FAIL, ALLOWING THE STEERING YOKE TO BECOME LOOSE.","mfr_campaign":null,"units":4393,"do_not_drive":false,"park_outside":false,"notification":null,"match":"exact","models":["MH"],"built_from":"1983-11-01","built_to":"1984-02-01","url":"https://open.wenmarpro.com/recalls/nhtsa/84V033000"},{"source":"nhtsa","country":"us","campaign":"83V100000","date":"1983-09-27","manufacturer":"MACK TRUCKS, INCORPORATED","component":"STEERING: STEERING WHEEL/HANDLE BAR","summary":"UNDER SEVERE STRAIN, A DEFECTIVE WELD JOINING THE STEERING WHEEL HUB TO THE HUB PERIMETER COULD FAIL, CAUSING THE STEERING WHEEL TO SEPARATE FROM THE VEHICLE.","mfr_campaign":null,"units":507,"do_not_drive":false,"park_outside":false,"notification":null,"match":"exact","models":["MH"],"built_from":"1982-04-01","built_to":"1983-09-01","url":"https://open.wenmarpro.com/recalls/nhtsa/83V100000"},{"source":"tc","country":"ca","campaign":"1983081","date":"1982-09-29","manufacturer":null,"component":null,"summary":"AN INEFFECTIVE WELD AT THE SPLINED CENTRE OF THE STEERING WHEEL HUB TO THE HUB PERIMETER COULD UNDER SEVERE STRAIN AND DEFLECTION, FAIL AND RESULT IN STEERING WHEEL SEPARATION.  STEERING WHEEL DISENGAGEMENT MAY LEAD TO LOSS OF STEERING CONTROL WITHOUT PRIOR WARNING WITH A POTENTIAL FOR VEHICLE CRASH.","mfr_campaign":"SC152","units":25,"do_not_drive":null,"park_outside":null,"notification":null,"match":"exact","models":["MH"],"built_from":null,"built_to":null,"url":"https://open.wenmarpro.com/recalls/tc/1983081"}],"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":["Contains information licensed under the Open Government Licence – Canada."]}