Looking for some advice on what tool I need/the process to remove the pivot bearings from the Shimano Ultegra direct mount rim brakes. It looks like I'll need a hook wrench(?) to get at the rear silver nuts, but the black notched ring on the front I'm unsure of .
Note this is not a question of how to remove the caliper from the frame - I want to remove the sleeve that the silver bolt sits inside.
Reason for asking is one side feels gritty and a little tight.
EDIT: I suspect this answers my question: https://si.shimano.com/pdfs/ev/EV-BR-R8010-RS-4254.pdf
The parts I'm referring to are not explicitly listed so I doubt are meant to be serviced.