James When I replace mine I but a little bit of thread (like sewing thread) around where the ring goes. I put the thread through the impeller then push the impeller on. When its on I pull the shaft out a little (just a little) with the thread and then remove the tread. I then put the ring on. No problems done 1-2-3. Have to make sure that all the tread is removed. I also tie the impeller fins down with a plastic tie and put vasiline on the whole impeller. As the impeller is slid onto the shaft, the plastic tie slides off, and the fins are facing in the right direction inside the the impeller shaft. Andy Slow"MO"tion #6038 Nyack, NY
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