SON28 Bearing Overhaul – Part 2

The story so far

At the beginning of this year, when I noticed that my venerable old SON28 dynamo hub had developed a bit of play in the bearings, I decided to prioritise a project that I’d been working on to figure out how to open the thing up to service it. After searching online for any information that I could get, I finally arrived at a tool that worked to unscrew the internals from the hub shell.

Success. Internal assembly removed from the hub.

I was certainly very pleased to see that the internals were completely free of any sign of corrosion, even after about 13 years of use. However, with the internals out of the hub I was able to feel that both of the bearings had some degree of play in them; the one on the terminal side of the hub being considerably worse.

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