If you read this post on the red power forum, I am trying to let others learn from my mistakes. Yesterday I clogged the rotor on my 1440 combine, didn't turn off the engine as the manual says to and I had a 4 ft. pipe on the wrench to unclog it and for some reason the separator engaged and I had an over night hospital stay and am now recovering from 3 skull fractures, a concussion, a black eye, and several bruises and skinned places. The Dr. told me I am lucky to still be here and I may have a 4 to 6 week recovery. Folks learn from my mistake. A chocked combine ain't worth gettin' killed over. Turn off the engine. I have had combines for almost 40 years and have never had a separator engage its self.