When I brake with my Shimano Inter-3 hub coaster brake it makes a loud screaming sound. There is an indication on the hub where you should lubricate it but I do not get it, there is no hole/opening to the hub. Can anybody point me at the right direction? Do I really have to open the entire hub?
I tried to lubricate it with normal chain oil from the outside (I know it's not the right one) but had no success.