Hello. I have a Toro Snowblower model# 38050 S/N 9002321. I have a question about the impeller. Is the impeller supposed to be loose or should it be somewhat tight? When the auger level is engaged is tightens up the impeller but when it is not engaged I can grab the pole to the auger and move it up and down and the impeller moves freely. Is there a bolt or anything I need to tighten, is there something missing or is it suppose to be that way to compensate for bigger chunks of snow or ice that could potentially damage the snowblower?