Now this model has to pump a wash pump and a drain pump .
Which did you remove ,the smallone about the size of a soda can?
ok on the main wash pump you have a capacitor .
it has two yellow wires on it ,are they plugged on to the capacitor?
ok if the cap is wired properly .
motor turns freely , and it hums ,it would have to be internal in the motor.
Here is a link to the part , it even has a replacement video ,but it sounds like you may not need the video.