Latest MACK U Recallshttp://www.arfc.org/rss/feeds/autos/mack/uThe latest automotive recalls from the National Highway Transportation Safety AdministrationSun, 22 Dec 2024 08:36:53 GMTen-us1440Copyright 2024, Eladrel Technologies, LLCAutomotive1992 MACK U RECALLED FOR VEHICLE SPEED CONTROLFUEL INJECTION SYSTEM RECONFIGURATION TO COMPLY WITH ENGINE EMISSION STANDARDS CAUSE HIGHER ENGINE VIBRATION LEVELS WHICH LEAD TO EARLY WEAR AND COMPLETE FAILURE OF THE SECONDARY THROTTLE RETURN MECHANISM.http://www.arfc.org/commercial/mack/u/recalls/000006998000015573000000294/recall.aspxTue, 15 Feb 1994 00:00:00 GMT1991 MACK U RECALLED FOR VEHICLE SPEED CONTROLFUEL INJECTION SYSTEM RECONFIGURATION TO COMPLY WITH ENGINE EMISSION STANDARDS CAUSE HIGHER ENGINE VIBRATION LEVELS WHICH LEAD TO EARLY WEAR AND COMPLETE FAILURE OF THE SECONDARY THROTTLE RETURN MECHANISM.http://www.arfc.org/commercial/mack/u/recalls/000006998000015563000000294/recall.aspxTue, 15 Feb 1994 00:00:00 GMT1990 MACK U RECALLED FOR VEHICLE SPEED CONTROLFUEL INJECTION SYSTEM RECONFIGURATION TO COMPLY WITH ENGINE EMISSION STANDARDS CAUSE HIGHER ENGINE VIBRATION LEVELS WHICH LEAD TO EARLY WEAR AND COMPLETE FAILURE OF THE SECONDARY THROTTLE RETURN MECHANISM.http://www.arfc.org/commercial/mack/u/recalls/000006998000015572000000294/recall.aspxTue, 15 Feb 1994 00:00:00 GMT1989 MACK U RECALLED FOR VEHICLE SPEED CONTROLFUEL INJECTION SYSTEM RECONFIGURATION TO COMPLY WITH ENGINE EMISSION STANDARDS CAUSE HIGHER ENGINE VIBRATION LEVELS WHICH LEAD TO EARLY WEAR AND COMPLETE FAILURE OF THE SECONDARY THROTTLE RETURN MECHANISM.http://www.arfc.org/commercial/mack/u/recalls/000006998000015571000000294/recall.aspxTue, 15 Feb 1994 00:00:00 GMT1988 MACK U RECALLED FOR VEHICLE SPEED CONTROLFUEL INJECTION SYSTEM RECONFIGURATION TO COMPLY WITH ENGINE EMISSION STANDARDS CAUSE HIGHER ENGINE VIBRATION LEVELS WHICH LEAD TO EARLY WEAR AND COMPLETE FAILURE OF THE SECONDARY THROTTLE RETURN MECHANISM.http://www.arfc.org/commercial/mack/u/recalls/000006998000015560000000294/recall.aspxTue, 15 Feb 1994 00:00:00 GMT1987 MACK U RECALLED FOR VEHICLE SPEED CONTROLFUEL INJECTION SYSTEM RECONFIGURATION TO COMPLY WITH ENGINE EMISSION STANDARDS CAUSE HIGHER ENGINE VIBRATION LEVELS WHICH LEAD TO EARLY WEAR AND COMPLETE FAILURE OF THE SECONDARY THROTTLE RETURN MECHANISM.http://www.arfc.org/commercial/mack/u/recalls/000006998000015569000000294/recall.aspxTue, 15 Feb 1994 00:00:00 GMT1989 MACK U RECALLED FOR VISIBILITY, WINDSHIELD WIPER/WASHER, LINKAGESA TOLERANCE MISMATCH IN THE CRANK ASSEMBLY OF THE BOSCH WINDSHIELD WIPER MOTOR COULD CAUSE INSTANTANEOUS SEPARATION OF THE CRANK FROM THE LINKAGE ASSEMBLY IN THE LEFT HAND CONTROL ARM ASSEMBLY; THIS WOULD MAKE THE SYSTEM INOPERABLE.http://www.arfc.org/commercial/mack/u/recalls/000005857000015571000000246/recall.aspxFri, 16 Mar 1990 00:00:00 GMT1979 MACK U RECALLED FOR ENGINE AND ENGINE COOLING, ENGINEIN THE EVENT OF TURBOCHARGER COMPRESSOR WHEEL FAILURE, ONE OR MORE OF THE FOUR CAPSCREWS THAT HOLD THE TURBOCHARGER TOGETHER MAY BE STRUCK BY PARTS OF THE COMPRESSOR WHEEL, RESULTING IN THE CAPSCREWS BEING DAMAGED. IF THESE CAPSCREWS ARE DAMAGED TO THE POINT THAT THEY ALLOW THE COMPRESSOR BACK PLATE TO DISLOCATE FROM THE TURBOCHARGER BEARING HOUSING, ENGINE LUBRICATING OIL MAY BE ALLOWED TO ESCAPE UNDER PRESSURE, CONTACTING THE ENGINE EXHAUST MANIFOLD SECTIONS OR TURBOCHARGER TURBINE HOUSING.http://www.arfc.org/commercial/mack/u/recalls/000003221000053110000000128/recall.aspxThu, 31 May 1979 00:00:00 GMT1978 MACK U RECALLED FOR ENGINE AND ENGINE COOLING, ENGINEIN THE EVENT OF TURBOCHARGER COMPRESSOR WHEEL FAILURE, ONE OR MORE OF THE FOUR CAPSCREWS THAT HOLD THE TURBOCHARGER TOGETHER MAY BE STRUCK BY PARTS OF THE COMPRESSOR WHEEL, RESULTING IN THE CAPSCREWS BEING DAMAGED. IF THESE CAPSCREWS ARE DAMAGED TO THE POINT THAT THEY ALLOW THE COMPRESSOR BACK PLATE TO DISLOCATE FROM THE TURBOCHARGER BEARING HOUSING, ENGINE LUBRICATING OIL MAY BE ALLOWED TO ESCAPE UNDER PRESSURE, CONTACTING THE ENGINE EXHAUST MANIFOLD SECTIONS OR TURBOCHARGER TURBINE HOUSING.http://www.arfc.org/commercial/mack/u/recalls/000003221000052279000000128/recall.aspxThu, 31 May 1979 00:00:00 GMT1977 MACK U RECALLED FOR ENGINE AND ENGINE COOLING, ENGINEIN THE EVENT OF TURBOCHARGER COMPRESSOR WHEEL FAILURE, ONE OR MORE OF THE FOUR CAPSCREWS THAT HOLD THE TURBOCHARGER TOGETHER MAY BE STRUCK BY PARTS OF THE COMPRESSOR WHEEL, RESULTING IN THE CAPSCREWS BEING DAMAGED. IF THESE CAPSCREWS ARE DAMAGED TO THE POINT THAT THEY ALLOW THE COMPRESSOR BACK PLATE TO DISLOCATE FROM THE TURBOCHARGER BEARING HOUSING, ENGINE LUBRICATING OIL MAY BE ALLOWED TO ESCAPE UNDER PRESSURE, CONTACTING THE ENGINE EXHAUST MANIFOLD SECTIONS OR TURBOCHARGER TURBINE HOUSING.http://www.arfc.org/commercial/mack/u/recalls/000003221000051823000000128/recall.aspxThu, 31 May 1979 00:00:00 GMT1978 MACK U RECALLED FOR STEERING, STEERING WHEEL/HANDLE BARAN IMPROPER PINCH BOLT AND NUT MAY HAVE BEEN USED IN THE CLAMPING OF THE STEERING SHAFT TO THE STEERING GEAR INPUT SHAFT. DUE TO CLAMPING FORCE LOADS APPLIED AT THE BOLT, THE NUT COULD YIELD, RESULTING IN LOOSENESS OF THE INPUT SHAFT YOKE. SHOULD THIS CONDITION GO UNNOTICED, SPLINE WEAR COULD CAUSE SHAFT SEPARATION.http://www.arfc.org/commercial/mack/u/recalls/000003170000052279000000002/recall.aspxTue, 03 Apr 1979 00:00:00 GMT1977 MACK U RECALLED FOR STEERING, STEERING WHEEL/HANDLE BARAN IMPROPER PINCH BOLT AND NUT MAY HAVE BEEN USED IN THE CLAMPING OF THE STEERING SHAFT TO THE STEERING GEAR INPUT SHAFT. DUE TO CLAMPING FORCE LOADS APPLIED AT THE BOLT, THE NUT COULD YIELD, RESULTING IN LOOSENESS OF THE INPUT SHAFT YOKE. SHOULD THIS CONDITION GO UNNOTICED, SPLINE WEAR COULD CAUSE SHAFT SEPARATION.http://www.arfc.org/commercial/mack/u/recalls/000003170000051823000000002/recall.aspxTue, 03 Apr 1979 00:00:00 GMT1978 MACK U RECALLED FOR SUSPENSION, MULTIPLE AXLEA CASTING DEFICIENCY EXISTS IN THE LOWER SECTION OF THE CAPS RESULTING IN A REDUCTION IN THE THICKNESS OF THE MATERIAL. FAILURE OF A CAP CAN ALLOW THE END OF THE REAR SPRING TO DETACH FROM THE AXLE HOUSING.http://www.arfc.org/commercial/mack/u/recalls/000003105000052279000000059/recall.aspxFri, 12 Jan 1979 00:00:00 GMT1977 MACK U RECALLED FOR SUSPENSION, MULTIPLE AXLEA CASTING DEFICIENCY EXISTS IN THE LOWER SECTION OF THE CAPS RESULTING IN A REDUCTION IN THE THICKNESS OF THE MATERIAL. FAILURE OF A CAP CAN ALLOW THE END OF THE REAR SPRING TO DETACH FROM THE AXLE HOUSING.http://www.arfc.org/commercial/mack/u/recalls/000003105000051823000000059/recall.aspxFri, 12 Jan 1979 00:00:00 GMT1978 MACK U RECALLED FOR SERVICE BRAKES, AIR, ANTILOCK, INTERCONNECTING ASSEMBLY(WIRING)DELAYS OF UP TO ABOUT 2 SECONDS MAY EXIST IN THE BRAKE APPLICATION TIMES TO THE BRAKES ON THE BOGIE AXLES IN THE PRESENCE OF CERTAIN TYPES OF WHEEL SPEED SENSOR SIGNAL DISCONTINUITIES OR DISTORTIONS THAT MAY OCCUR AS A RESULT OF SENSOR WIRE FAILURE. THIS CONSTITUTES A NON-COMPLIANCE TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS".http://www.arfc.org/commercial/mack/u/recalls/000002955000052279000000112/recall.aspxTue, 03 Oct 1978 00:00:00 GMT1977 MACK U RECALLED FOR SERVICE BRAKES, AIR, ANTILOCK, INTERCONNECTING ASSEMBLY(WIRING)DELAYS OF UP TO ABOUT 2 SECONDS MAY EXIST IN THE BRAKE APPLICATION TIMES TO THE BRAKES ON THE BOGIE AXLES IN THE PRESENCE OF CERTAIN TYPES OF WHEEL SPEED SENSOR SIGNAL DISCONTINUITIES OR DISTORTIONS THAT MAY OCCUR AS A RESULT OF SENSOR WIRE FAILURE. THIS CONSTITUTES A NON-COMPLIANCE TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, "AIR BRAKE SYSTEMS".http://www.arfc.org/commercial/mack/u/recalls/000002955000051823000000112/recall.aspxTue, 03 Oct 1978 00:00:00 GMT1974 MACK U RECALLED FOR STEERING, LINKAGES, KNUCKLE, SPINDLE, ARMDEFICIENCIES, IN THE FORM OF FORGING LAPS, CRACKS AND EXCESSIVE DECARBURIZATION DURING HEAT TREATMENT, EXIST IN THE STEERING KNUCKLES. STRESSES IMPOSED WITH INTEGRAL HYDRAULIC POWER STEERING MAY LEAD TO A FAILURE IN THE AREA OF THE STEERING ARM ATTACHING BOSS. THIS TYPE OF FAILURE WOULD CAUSE LOSS OF STEERING CONTROL.http://www.arfc.org/commercial/mack/u/recalls/000002916000050083000000021/recall.aspxTue, 08 Aug 1978 00:00:00 GMT1973 MACK U RECALLED FOR STEERING, LINKAGES, KNUCKLE, SPINDLE, ARMDEFICIENCIES, IN THE FORM OF FORGING LAPS, CRACKS AND EXCESSIVE DECARBURIZATION DURING HEAT TREATMENT, EXIST IN THE STEERING KNUCKLES. STRESSES IMPOSED WITH INTEGRAL HYDRAULIC POWER STEERING MAY LEAD TO A FAILURE IN THE AREA OF THE STEERING ARM ATTACHING BOSS. THIS TYPE OF FAILURE WOULD CAUSE LOSS OF STEERING CONTROL.http://www.arfc.org/commercial/mack/u/recalls/000002916000049465000000021/recall.aspxTue, 08 Aug 1978 00:00:00 GMT1972 MACK U RECALLED FOR STEERING, LINKAGES, KNUCKLE, SPINDLE, ARMDEFICIENCIES, IN THE FORM OF FORGING LAPS, CRACKS AND EXCESSIVE DECARBURIZATION DURING HEAT TREATMENT, EXIST IN THE STEERING KNUCKLES. STRESSES IMPOSED WITH INTEGRAL HYDRAULIC POWER STEERING MAY LEAD TO A FAILURE IN THE AREA OF THE STEERING ARM ATTACHING BOSS. THIS TYPE OF FAILURE WOULD CAUSE LOSS OF STEERING CONTROL.http://www.arfc.org/commercial/mack/u/recalls/000002916000049594000000021/recall.aspxTue, 08 Aug 1978 00:00:00 GMT1971 MACK U RECALLED FOR STEERING, LINKAGES, KNUCKLE, SPINDLE, ARMDEFICIENCIES, IN THE FORM OF FORGING LAPS, CRACKS AND EXCESSIVE DECARBURIZATION DURING HEAT TREATMENT, EXIST IN THE STEERING KNUCKLES. STRESSES IMPOSED WITH INTEGRAL HYDRAULIC POWER STEERING MAY LEAD TO A FAILURE IN THE AREA OF THE STEERING ARM ATTACHING BOSS. THIS TYPE OF FAILURE WOULD CAUSE LOSS OF STEERING CONTROL.http://www.arfc.org/commercial/mack/u/recalls/000002916000048103000000021/recall.aspxTue, 08 Aug 1978 00:00:00 GMT1976 MACK U RECALLED FOR SERVICE BRAKES, AIR, ANTILOCK, CONTROL UNIT/MODULEAN AXLE "NO BRAKE" CONDITION COULD RESULT FROM AN EATON CONTROLLER INTERNAL ELECTRICAL MALFUNCTION. THIS CONDITION MAY CAUSE THE ANTI-WHEEL LOCK VALVE SOLENOID TO BE CONTINUOUSLY ENERGIZED AND PREVENT THE BRAKES FROM BEING APPLIED ON ONE OF THE AXLES. AS A RESULT, THE ANTI-WHEEL LOCK WARNING LAMP IS NOT ACTIVATED.http://www.arfc.org/commercial/mack/u/recalls/000002813000051821000000111/recall.aspxTue, 04 Apr 1978 00:00:00 GMT1975 MACK U RECALLED FOR SERVICE BRAKES, AIR, ANTILOCK, CONTROL UNIT/MODULEAN AXLE "NO BRAKE" CONDITION COULD RESULT FROM AN EATON CONTROLLER INTERNAL ELECTRICAL MALFUNCTION. THIS CONDITION MAY CAUSE THE ANTI-WHEEL LOCK VALVE SOLENOID TO BE CONTINUOUSLY ENERGIZED AND PREVENT THE BRAKES FROM BEING APPLIED ON ONE OF THE AXLES. AS A RESULT, THE ANTI-WHEEL LOCK WARNING LAMP IS NOT ACTIVATED.http://www.arfc.org/commercial/mack/u/recalls/000002813000050647000000111/recall.aspxTue, 04 Apr 1978 00:00:00 GMT1974 MACK U RECALLED FOR SERVICE BRAKES, AIR, ANTILOCK, CONTROL UNIT/MODULEAN AXLE "NO BRAKE" CONDITION COULD RESULT FROM AN EATON CONTROLLER INTERNAL ELECTRICAL MALFUNCTION. THIS CONDITION MAY CAUSE THE ANTI-WHEEL LOCK VALVE SOLENOID TO BE CONTINUOUSLY ENERGIZED AND PREVENT THE BRAKES FROM BEING APPLIED ON ONE OF THE AXLES. AS A RESULT, THE ANTI-WHEEL LOCK WARNING LAMP IS NOT ACTIVATED.http://www.arfc.org/commercial/mack/u/recalls/000002813000050083000000111/recall.aspxTue, 04 Apr 1978 00:00:00 GMT1978 MACK U RECALLED FOR SUSPENSION, MULTIPLE AXLETHE TEE BRACKET, WHICH IS MOUNTED ON THE FRONT AXLE OF THE BOGIE, MAY FAIL DUE TO VIBRATION BROUGHT ON BY ROAD SURFACE IRREGULARITIES. BRACKET FAILURE WOULD LEAVE THE TEE BRACKET UNSUPPORTED AND CAUSE BROKEN HOSE CONNECTOR FITTINGS. THIS WOULD RESULT IN AUTOMATIC APPLICATION OF THE SPRING EMERGENCY BRAKES.http://www.arfc.org/commercial/mack/u/recalls/000002776000052279000000059/recall.aspxThu, 09 Feb 1978 00:00:00 GMT1977 MACK U RECALLED FOR SUSPENSION, MULTIPLE AXLETHE TEE BRACKET, WHICH IS MOUNTED ON THE FRONT AXLE OF THE BOGIE, MAY FAIL DUE TO VIBRATION BROUGHT ON BY ROAD SURFACE IRREGULARITIES. BRACKET FAILURE WOULD LEAVE THE TEE BRACKET UNSUPPORTED AND CAUSE BROKEN HOSE CONNECTOR FITTINGS. THIS WOULD RESULT IN AUTOMATIC APPLICATION OF THE SPRING EMERGENCY BRAKES.http://www.arfc.org/commercial/mack/u/recalls/000002776000051823000000059/recall.aspxThu, 09 Feb 1978 00:00:00 GMT1976 MACK U RECALLED FOR SUSPENSION, MULTIPLE AXLETHE TEE BRACKET, WHICH IS MOUNTED ON THE FRONT AXLE OF THE BOGIE, MAY FAIL DUE TO VIBRATION BROUGHT ON BY ROAD SURFACE IRREGULARITIES. BRACKET FAILURE WOULD LEAVE THE TEE BRACKET UNSUPPORTED AND CAUSE BROKEN HOSE CONNECTOR FITTINGS. THIS WOULD RESULT IN AUTOMATIC APPLICATION OF THE SPRING EMERGENCY BRAKES.http://www.arfc.org/commercial/mack/u/recalls/000002776000051821000000059/recall.aspxThu, 09 Feb 1978 00:00:00 GMT1975 MACK U RECALLED FOR SUSPENSION, MULTIPLE AXLETHE TEE BRACKET, WHICH IS MOUNTED ON THE FRONT AXLE OF THE BOGIE, MAY FAIL DUE TO VIBRATION BROUGHT ON BY ROAD SURFACE IRREGULARITIES. BRACKET FAILURE WOULD LEAVE THE TEE BRACKET UNSUPPORTED AND CAUSE BROKEN HOSE CONNECTOR FITTINGS. THIS WOULD RESULT IN AUTOMATIC APPLICATION OF THE SPRING EMERGENCY BRAKES.http://www.arfc.org/commercial/mack/u/recalls/000002776000050647000000059/recall.aspxThu, 09 Feb 1978 00:00:00 GMT1977 MACK U RECALLED FOR SUSPENSION, REAR, SPRINGS, LEAF SPRING ASSEMBLY, HANGER/BRACKETA DEFICIENCY EXISTS IN THE WELDS SECURING THE REAR SPRING INSULATOR BRACKET TO THE AXLE HOUSING. THIS IS DUE TO IMPROPER POSITIONING OF THE WELD, IN RELATIONSHIP TO THE BRACKET AND AXLE HOUSING. FAILURE OF THE WELDS WOULD CAUSE SEPARATION OF THE SPRING INSULATOR BRACKET AND THE AXLE HOUSING, RESULTING IN IMPROPER ALIGNMENT OF THE AFFECTED AXLE.http://www.arfc.org/commercial/mack/u/recalls/000002642000051823000000053/recall.aspxMon, 21 Nov 1977 00:00:00 GMT1977 MACK U RECALLED FOR ENGINE AND ENGINE COOLING, COOLING SYSTEM, FANTHE FLEX BLADE FANS ON THE INVOLVED VEHICLES MAY DEVELOP CRACKS IN THE LAMINATED STIFFENER AS A RESULT OF FATIGUE DURING OPERATION. IF SUCH A CONDITION EXISTS AND THE CRACKS GO UNDETECTED, CONTINUED OPERATION COULD CAUSE PIECES OF THE STIFFENER TO BREAK OFF.http://www.arfc.org/commercial/mack/u/recalls/000002610000051823000000136/recall.aspxWed, 12 Oct 1977 00:00:00 GMT1977 MACK U RECALLED FOR SEAT BELTS, FRONT, ANCHORAGETHE INVOLVED VEHICLES DO NOT CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 209, "SEATBELT ASSEMBLIES". ALTHOUGH THE SEATBELTS IN QUESTION PERFORMED MARGINALLY WITH RESPECT TO THE 5000 LB. LOAD REQUIREMENT, ADDITIONAL TESTING CONFIRMED THAT THE ANCHOR COULD FAIL, ALLOWING EITHER THE ANCHOR TO SLIP OVER THE HOLD-DOWN NUT OR THE ANCHOR TO SEPARATE INTO TWO PIECES.http://www.arfc.org/commercial/mack/u/recalls/000002611000051823000000265/recall.aspxWed, 12 Oct 1977 00:00:00 GMT1976 MACK U RECALLED FOR ENGINE AND ENGINE COOLING, COOLING SYSTEM, FANTHE FLEX BLADE FANS ON THE INVOLVED VEHICLES MAY DEVELOP CRACKS IN THE LAMINATED STIFFENER AS A RESULT OF FATIGUE DURING OPERATION. IF SUCH A CONDITION EXISTS AND THE CRACKS GO UNDETECTED, CONTINUED OPERATION COULD CAUSE PIECES OF THE STIFFENER TO BREAK OFF.http://www.arfc.org/commercial/mack/u/recalls/000002610000051821000000136/recall.aspxWed, 12 Oct 1977 00:00:00 GMT1975 MACK U RECALLED FOR ENGINE AND ENGINE COOLING, COOLING SYSTEM, FANTHE FLEX BLADE FANS ON THE INVOLVED VEHICLES MAY DEVELOP CRACKS IN THE LAMINATED STIFFENER AS A RESULT OF FATIGUE DURING OPERATION. IF SUCH A CONDITION EXISTS AND THE CRACKS GO UNDETECTED, CONTINUED OPERATION COULD CAUSE PIECES OF THE STIFFENER TO BREAK OFF.http://www.arfc.org/commercial/mack/u/recalls/000002610000050647000000136/recall.aspxWed, 12 Oct 1977 00:00:00 GMT1974 MACK U RECALLED FOR ENGINE AND ENGINE COOLING, COOLING SYSTEM, FANTHE FLEX BLADE FANS ON THE INVOLVED VEHICLES MAY DEVELOP CRACKS IN THE LAMINATED STIFFENER AS A RESULT OF FATIGUE DURING OPERATION. IF SUCH A CONDITION EXISTS AND THE CRACKS GO UNDETECTED, CONTINUED OPERATION COULD CAUSE PIECES OF THE STIFFENER TO BREAK OFF.http://www.arfc.org/commercial/mack/u/recalls/000002610000050083000000136/recall.aspxWed, 12 Oct 1977 00:00:00 GMT1973 MACK U RECALLED FOR ENGINE AND ENGINE COOLING, COOLING SYSTEM, FANTHE FLEX BLADE FANS ON THE INVOLVED VEHICLES MAY DEVELOP CRACKS IN THE LAMINATED STIFFENER AS A RESULT OF FATIGUE DURING OPERATION. IF SUCH A CONDITION EXISTS AND THE CRACKS GO UNDETECTED, CONTINUED OPERATION COULD CAUSE PIECES OF THE STIFFENER TO BREAK OFF.http://www.arfc.org/commercial/mack/u/recalls/000002610000049465000000136/recall.aspxWed, 12 Oct 1977 00:00:00 GMT1972 MACK U RECALLED FOR ENGINE AND ENGINE COOLING, COOLING SYSTEM, FANTHE FLEX BLADE FANS ON THE INVOLVED VEHICLES MAY DEVELOP CRACKS IN THE LAMINATED STIFFENER AS A RESULT OF FATIGUE DURING OPERATION. IF SUCH A CONDITION EXISTS AND THE CRACKS GO UNDETECTED, CONTINUED OPERATION COULD CAUSE PIECES OF THE STIFFENER TO BREAK OFF.http://www.arfc.org/commercial/mack/u/recalls/000002610000049594000000136/recall.aspxWed, 12 Oct 1977 00:00:00 GMT