Bearing change on ownboard hubs

Cheers guys,

i was wandering how to safely change beraings on an ownboard hub.
Until today i only removed the screws of the outer panel to clean/change the sleeves but recently got a strange clicking noise when one of the hubs is under pressure.
Figured it would be a faulty bearing but am not sure if i’m able to buy new ones or if it would be possible to maintain the ones in use.
The screws holding together the mechanics seem to be very tight and i don’t want to destroy stuff that i’d not be able to fix afterwards.
So if you got some source or information on what awaits in the stator-compartment i’d be thankful.

Thanks in advance
Timo