Just bought 2003 Volvo ec210b lc think the swing berring is bad

I am new to owning excavators but I have rented them for years. I just bought a 2003 Volvo ec210b lc and I think the swing berring is bad. It runs great and works fine but I can feel and see the machine wobble slightly. I grease it before each work day. How can I tell if and how bad it is and can I continue to use it carefully and slowly with a lot of grease. There is no grinding noises just a slight vibration when I push stuff with the side of the bucket.
(V11360)

Thank you in advance

Just bought 2003 Volvo ec210b lc think the swing berring is bad