Thanks for the question.
Tell me if theres a long screen on the floor towards the back of the tub please.
This piston and nut is screwed in to the sump this gets worn out or gets clogged with food particles.
Replace this part it should fix the problem.
I just got the opertunity to look at the part you were referring to. You were right in that the part is defective, but I do not know as of yet if it fixed the problem until I get the new part in next week. I am going to accept your answer, if i find that I still have problems I will contact you next week.
Thats not a problem I'm sure it will work for you , but if you need me Ill be here.
Thanks and God Bless.