KENWORTH IS RECALLING CERTAIN MODEL YEAR 2009 THROUGH 2010 T660 TRACTOR TRAILORS MANUFACTURED FROM JULY 1, 2008 THROUGH JULY 31, 2009. THE RETAINING PINS SECURING THE HOOD STRUT LOCK TUBE TO THE HOOD STRUT ASSEMBLY MAY BECOME LOOSE AND FALL OUT ALLOWING THE LOCK TUBE TO ROTATE ON THE STRUT ASSEMBLY. IN ITS NORMAL OPERATION THE SAFETY LATCH FEATURE IS AUTOMATICALLY SET AND IT PREVENTS THE HOOD FROM CLOSING. WITH THE HOOD CLOSED AND THE RETAINING PINS MISSING, THE LOCK TUBE MAY ROTATE RELATIVE TO THE GOOD STRUT RESULTING IN A NON-OPERATIONAL SAFETY LATCH FEATURE WHEN THE HOOD IS OPENED.