2010 MACK CXU612 Structureframe And Members Problems

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 THE BOLTS TO SPECS, BUT THEY ONLY STRETCHED. I REPLACED THE BOLTS WITH AFTERMARKET BOLTS WHICH TIGHTENED NORMALLY. *TR

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 PROPERLY, ALL OF THEM STRETCHED. I REPLACED ALL OF THE BOLTS AND TAGGED THE DEFECTIVE BOLTS FOR MACK WARRANTY. AS A CITIZEN WHO EXPECTS THE HIGHWAYS OF THE UNITED STATES TO BE SAFE FOR TRAVEL, I AM ASKING THE ODI TO FIND OUT WHY ALL OF THE MACKS DELIVERED TO ABF HAVE DEFECTIVE 5TH WHEEL MOUNT BOLTS AND TO FIND OUT IF THE MACKS DELIVERED TO MORE DEMANDING CUSTOMERS ( SUCH AS LOGGERS, GRAVEL TRUCKS, CONCRETE TRUCKS, AND TANDEM...

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 I HAD PREVIOUSLY BEEN ORDERED TO DO BUT THE BOLTS ONLY STRETCHED. I REPLACED THE 5TH WHEEL BOLTS. THE OLD BOLTS THAT HAD BEEN TIGHTENED WERE VISIBLY STRETCHED. *TR