EMPLOYEE WAS HELPING DISMANTLE AND MOVE 36"" FIELD TRUSS/CONVEYOR TO ANOTHER PART OF PIT. A HYDRAULIC CRANE WAS LIFTING 60' SECTIONS OF CONVEYOR. TAG LINES WERE ATTACHED. AS THE CONVEYOR WAS LI FTED THE CONVEYOR SWUNG AROUND TOWARD EMPLOYEE. EMPLOYEE MOVED OUT OF THE WAY QUICKLY SPRAINING RIGHT KNEE.