Dishwasher pump not working

Question

I have a kenmore model 665 that would not pump I took it apart cleaned it out now I am having trouble putting it back together . At the pump there is a spring what looks like a metalwasher and what I would call the impellor. when i took it apart it came apart and I did not see how it was put together. any tips on my problem and how to fix it would be great. the whole model # 665-17791790