THE CONVEYER WAS BEING LIFTED WITH THE LOADER TO BE PLACED ON TO CONVEYER STANDS. THE CONVEYER STANDS WERE NOT IN THE PROPER PLACE, AS THE CONVEYER WAS LOWERED IT SHIFTED CAUSING HIS ARM TO B E PINCHED BETWEEN THE PLANT AND THE CONVEYER. HEPLACED HIS ARM ON THE CONVEYER AS IT WAS BEING LOWERED.