https://plaincars.com/make/mack-cxu612 New NHTSA complaints and recalls filed for the Mack Cxu612. en-us Sun, 18 Oct 2026 10:33:20 GMT https://plaincars.com/make/mack-cxu612 https://plaincars.com/make/mack-cxu612#complaint-889117 Sun, 06 Nov 2011 00:00:00 GMT I AM A MAINTENANCE MECHANIC FOR A LARGE TRUCKING FIRM. ON 4 OCT 2011, I CHECKED THE TORQUE ON THE 5TH WHEEL BOLTS OF UNIT 11054 BECAUSE I COULD SEE THAT THE 5TH WHEEL WAS SLIDING ON THE FRAME. THE BOLTS WERE DEFECTIVE - YIELDING PRIOR TO REACHING THE RECOMMENDED TORQUE OF 236 FT.LB. I ADJUSTED THE TORQUE WRENCH TO 200 FT.LB., ITS LOWEST SETTING, AND COULD NOT GET ANY OF THE BOLTS TO HOLD. I REPLAC https://plaincars.com/make/mack-cxu612 https://plaincars.com/make/mack-cxu612#complaint-889118 Sun, 06 Nov 2011 00:00:00 GMT I AM A MAINTENANCE MECHANIC FOR A LARGE TRUCKING FIRM. ON 4 OCT 2011, I CHECKED THE TORQUE ON THE 5TH WHEEL BOLTS OF UNIT 11054 BECAUSE I COULD SEE THAT THE 5TH WHEEL WAS SLIDING ON THE FRAME. THE BOLTS WERE DEFECTIVE - YIELDING PRIOR TO REACHING THE RECOMMENDED TORQUE OF 236 FT.LB. I ADJUSTED THE TORQUE WRENCH TO 200 FT.LB., ITS LOWEST SETTING, AND COULD NOT GET ANY OF THE BOLTS TO HOLD. I REPLAC https://plaincars.com/make/mack-cxu612 https://plaincars.com/make/mack-cxu612#complaint-848229 Tue, 22 Mar 2011 00:00:00 GMT THE 5TH WHEEL MOUNT BOLTS ON MY COMPANY'S 2010 AND 2009 MACK TRUCKS ARE STRETCHING AND BECOMING LOOSE. I SAW UNIT 10101 ON SUNDAY, 20 MARCH 2011 ON OUR YARD READY TO HOOK UP. I HAD FINISHED MY SHIFT AND WAS WALKING PAST THE UNIT WHEN I REACHED OUT AND TURNED THE BOLT BY HAND. *TR https://plaincars.com/make/mack-cxu612 https://plaincars.com/make/mack-cxu612#complaint-847175 Tue, 15 Mar 2011 00:00:00 GMT I AM A MECHANIC FOR A LARGE TRUCKING FIRM. I HAVE BEEN COMPLAINING ABOUT THE 5TH WHEEL BOLTS ON OUR 2008, 2009, AND 2010 MACK TRUCKS FOR TWO YEARS NOW. THE COMPANY HAS YET TO IMPLEMENT A PROGRAM TO CORRECT THIS MATTER, INSTEAD CHOOSING TO THREATEN ME WITH DISCIPLINARY ACTION FOR POINTING OUT LOOSE BOLTS ON OUR ROAD TRACTORS. TODAY (03/15/2011) I PASSED A 2010 TRACTOR ON THE READY LINE. IT WAS UNIT https://plaincars.com/make/mack-cxu612 https://plaincars.com/make/mack-cxu612#complaint-818175 Sun, 03 Oct 2010 00:00:00 GMT MACK HAS BEEN SELLING OVER THE ROAD TRUCKS WITH SUBSTANDARD BOLTS HOLDING THE 5TH WHEEL TO THE FRAME. AS A MECHANIC WITH ABF, I AM SEEING TRUCKS EVERY DAY WITH 5TH WHEELS THAT ARE LOOSE. ON 22 SEPTEMBER 2010, I WORKED ON UNIT #10222 AT THE LITTLE ROCK SHOP. THIS TRUCK HAD ONLY 4376 MILES ON IT AND I COULD TURN THE 5TH WHEEL BOLTS WITH ONE HAND USING A 10 INCH COMBINATION WRENCH. I TRIED TO TORQUE https://plaincars.com/make/mack-cxu612 https://plaincars.com/make/mack-cxu612#complaint-818176 Sun, 03 Oct 2010 00:00:00 GMT MACK HAS BEEN SELLING OVER THE ROAD TRUCKS WITH SUBSTANDARD BOLTS HOLDING THE 5TH WHEEL TO THE FRAME. AS A MECHANIC WITH ABF, I AM SEEING TRUCKS EVERY DAY WITH 5TH WHEELS THAT ARE LOOSE. ON 22 SEPTEMBER 2010, I WORKED ON UNIT #10222 AT THE LITTLE ROCK SHOP. THIS TRUCK HAD ONLY 4376 MILES ON IT AND I COULD TURN THE 5TH WHEEL BOLTS WITH ONE HAND USING A 10 INCH COMBINATION WRENCH. I TRIED TO TORQUE https://plaincars.com/make/mack-cxu612 https://plaincars.com/make/mack-cxu612#complaint-816009 Wed, 22 Sep 2010 00:00:00 GMT AS A MECHANIC CONTRACTED TO MAINTAIN ABF ROAD TRACTORS, I WORKED ON UNIT 10064 ON 9/22/2010. I DISCOVERED THAT THE 5TH WHEEL MOUNT BOLTS WERE ALL LOOSE. THIS TRUCK HAD ONLY 51,285 MILES OF SERVICE PULLING PUP TRAILERS! I REMOVED THE BOLTS TO MAKE SURE THERE WAS NO THREAD DAMAGE, LIGHTLY OILED THEM, AND ATTEMPTED TO TORQUE THEM TO MACK SPECS OF 235 FT.LBS. TORQUE. NONE OF THE BOLTS WOULD TIGHTEN PR https://plaincars.com/make/mack-cxu612 https://plaincars.com/make/mack-cxu612#complaint-816010 Wed, 22 Sep 2010 00:00:00 GMT AS A MECHANIC CONTRACTED TO MAINTAIN ABF ROAD TRACTORS, I WORKED ON UNIT 10064 ON 9/22/2010. I DISCOVERED THAT THE 5TH WHEEL MOUNT BOLTS WERE ALL LOOSE. THIS TRUCK HAD ONLY 51,285 MILES OF SERVICE PULLING PUP TRAILERS! I REMOVED THE BOLTS TO MAKE SURE THERE WAS NO THREAD DAMAGE, LIGHTLY OILED THEM, AND ATTEMPTED TO TORQUE THEM TO MACK SPECS OF 235 FT.LBS. TORQUE. NONE OF THE BOLTS WOULD TIGHTEN PR https://plaincars.com/make/mack-cxu612 https://plaincars.com/make/mack-cxu612#complaint-815698 Tue, 21 Sep 2010 00:00:00 GMT I AM A MECHANIC FOR ABF FREIGHT SYSTEM. I HAVE OBSERVED THAT MANY OF THE MACK TRUCKS WE USE IN OUR ROAD FLEET HAVE PREMATURE FAILURE OF THE FASTENERS HOLDING THE 5TH WHEEL COUPLER TO THE TRUCK FRAME. I WORKED ON UNIT 10016 ON 9/21/2010 AND CHECKED THE 5TH WHEEL BOLT TIGHTNESS AS A FOLLOW UP TO COMPLAINT #10356665. THE BOLTS WERE LOOSE AFTER ONLY 63,450 MILES OF SERVICE. I TRIED TO TIGHTEN THEM AS https://plaincars.com/make/mack-cxu612 https://plaincars.com/make/mack-cxu612#complaint-815699 Tue, 21 Sep 2010 00:00:00 GMT I AM A MECHANIC FOR ABF FREIGHT SYSTEM. I HAVE OBSERVED THAT MANY OF THE MACK TRUCKS WE USE IN OUR ROAD FLEET HAVE PREMATURE FAILURE OF THE FASTENERS HOLDING THE 5TH WHEEL COUPLER TO THE TRUCK FRAME. I WORKED ON UNIT 10016 ON 9/21/2010 AND CHECKED THE 5TH WHEEL BOLT TIGHTNESS AS A FOLLOW UP TO COMPLAINT #10356665. THE BOLTS WERE LOOSE AFTER ONLY 63,450 MILES OF SERVICE. I TRIED TO TIGHTEN THEM AS https://plaincars.com/make/mack-cxu612 https://plaincars.com/make/mack-cxu612#complaint-815442 Mon, 20 Sep 2010 00:00:00 GMT I AM A MECHANIC FOR ABF. FOR THE LAST THREE YEARS, MACK HAS SOLD TO ABF ROAD TRACTORS WITH DEFECTIVE 5TH WHEEL MOUNTING BOLTS. THE BOLTS STRETCH AND BECOME LOOSE WITH USE (USUALLY WITHIN THE FIRST 30,000 MILES). FOR UNKNOWN REASONS ABF HAS NEVER HELD MACK ACCOUNTABLE FOR THIS PROBLEM, PREFERRING TO TIGHTEN THE BOLTS WHEN A DRIVER COMPLAINS AND REPLACING BOLTS WHEN THEY PULL IN TWO. I HAVE REPEA https://plaincars.com/make/mack-cxu612 https://plaincars.com/make/mack-cxu612#complaint-815443 Mon, 20 Sep 2010 00:00:00 GMT I AM A MECHANIC FOR ABF. FOR THE LAST THREE YEARS, MACK HAS SOLD TO ABF ROAD TRACTORS WITH DEFECTIVE 5TH WHEEL MOUNTING BOLTS. THE BOLTS STRETCH AND BECOME LOOSE WITH USE (USUALLY WITHIN THE FIRST 30,000 MILES). FOR UNKNOWN REASONS ABF HAS NEVER HELD MACK ACCOUNTABLE FOR THIS PROBLEM, PREFERRING TO TIGHTEN THE BOLTS WHEN A DRIVER COMPLAINS AND REPLACING BOLTS WHEN THEY PULL IN TWO. I HAVE REPEA