The washer won't drain after a wash cycle, but it agitates fine. I checked all three hoses and there were no clogs. I replaced the pump but it still won't drain. While I was installing the new pump a brass pin fell from somewhere inside the washer. It doesn't look like it came from the washer: photo[2] | Flickr - Photo Sharing!. It's ~2" long and too thick to fit through the holes inside the washer. No one in the family had ever seen it before so I assume it came from somewhere in the underside of the washer. Is this part of my washer and could the lack of it cause the washer not to drain? If not what other things can I check or replace to diagnose or fix the problem?

Edit:
I'm pretty sure the motor drive shaft was seated properly into the pump. It's flat on one side and won't go into the hole any other way. If it's not seated the clips won't reach.