PINBOXES WELDED TO THE HITCH OF THE 5TH WHEEL UNIT MAY BEND UNDER CERTAIN CONDITIONS WHERE MAXIMUM STRESS IS APPROACHED OR EXCEEDED, CAUSING THE KINGPIN TO BREAK. CONSEQUENCE OF DEFECT: IF THE KINGPIN BREAKS FREE OF THE PINBOX, THE TRAILER COULD SLIDE OFF THE HITCH AND DAMAGE THE TOWING TRUCK OR MAY SEPARATE COMPLETELY FROM THE TOWING VEHICLE AND RESULT IN AN ACCIDENT.
FixREPAIR AND REINFORCE PINBOX AS NECESSARY.