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  1. Fulcrum have all the service guides online if you search for them. On their website its under support then catalogues

  2. Those two hex bolts are just holding the hub together. You need to get two wrenches, probably 15-19mm it looks like, and just loosen them and the hub assembly should come apart. There should be a preload sleeve that you can turn to loosen or tighten the preload.

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