TWO MECHANICS WERE ATTEMPTING TO MOVE A HAUL TRUCK, WHICH HAD A FLAT TIRE, TO A LOCATION WHERE THE TIRE COULD BE CHANGED. THE MECHANICS ATTEMPTED TO PULL THE TRUCK AWAY FROM THE RIB WITH A 4 Y D LOADER ALONG WITH THE ASSISTANCE OF ONE MECHANIC AT THE CONTROLS OF THE TRUCK. DURING THE PROCESS OF MOVING THE TRUCK THE LOADER PULLED AWAY CAUSING THE TRUCK TO JAR.