Dynamo-hubs are wheel hubs that contain an electricity-generating mechanism (dynamo) that converts wheel motion into electricity to power lights or other accessories on a bicycle. They form an integral part of the wheel in contrast to bottle dynamos that are affixed separately to the bike.
I have a Sturmey Archer X-FDD dynohub and drum brake for about 2 years. I've riden about 6000 miles and I'm sure it's due for maintenace but I just don't know what kind of maintenance is required. I ...