asked by: a guest Are bearings and cones user serviceable?
anwered by: canteau They technically are and use a standard cone/bearing set up like most Shimano hubs. However, Shimano does not provide a service manual and care must be done not to damage the Dynamo wire and mechanism as they are not available aftermarket.
There are a few 3rd party websites that do offer step by step instructions.
not logged-in log-in to get credit for your answer