Old 11-09-20, 06:56 PM
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dddd
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Bikes: Cheltenham-Pederson racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.

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Sansin hubs from around this time did tend to break flanges more often than other brands.

It appears that this freehub body is not secured with a hollow bolt but with an interference fit(?).

Shimano's early 600 and lesser freehubs did a similar thing but with the hub body "snout" peened to pernantly retain the assembled body.

You can twist the smallest threaded cog off to release the remaining cogs, I believe that the other six are splined.

Hopefully the rear hub and cassette are in good order so you can easily retain the Suntour-spaced cogs that match your indexing system.
The freehub body should be supported by the axle and bearings even if the interference fit is no longer tight. If there is much play there I would use LocTite.
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