Hi, I am relatively new to 3d printing, but I have worked out that I have a Z Resonance issue.

Here is a picture of the issue
http://i.imgur.com/ssVE0eG.jpg

I have seen a few people say that removing the bearing on the top of the z axis threaded rod fixes the issue. This is great, however I am not sure how to remove it without damaging the printer beyond my fixing.
I would like to try to fix this myself before contacting flashforge directly.

Any help that this forum may provide would be greatly appreciated!