Shimano doesn't make any service manual for their dynamo hubs that the OP can use, period. This is because Shimano thinks that that part of the hub isn't user servicable. The only userguide for overhauling Shimano dynamo hubs I know of was made by Trinity bicycles, but their site has been down for quite some time, and the "Wayback" machine doesn't have the crucial pictures to the guide.

To my knowledge no amount of google kung fu can give anything more than general guidelines for servicing the rotor part in a Shimano dynamo hub, so the OP isn't lazy at all.

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Regards