Hi all..i have the Englander pellet stove pdvc 25--have had issues with the motors and auger and have replaced numerous times. so like usual I had replaced the auger motor (top) in October and it has stopped turning again. have adjusted the screw that attaches motor to auger and when I took it out the gear is all grinded down so the screw will not turn (motor still running) and clearly the gear is grinded down and metal filings are present. why does it keep doing this? I have replaced the screw and the entire top auger in October also ..