So after several years of hard use the rear hub of the Kona has developed some quite severe lateral play. Along with this the bearings felt rougher than a Badgers bottom.
Unfortunately it's a modern hub with no obvious means of working on it and no markings on it meant I couldn't find no technical documents. The only thing I knew from the original bike specs is that it is a Novatech hub, but no clue which model.
So this evening I sat down and had a play, removed the disc and cassette first, so I could see more clearly, then realised you could unscrew the disc side end cap off by hand. With that, it all came apart and I was left with this pile of parts.
Immediately I could see the sealing O-Ring around the end cap was shot, which in turn meant the end cap was not sitting properly, potentially the source of the float?
I then checked the bearings out, there appear to be three sealed bearings, one in the freehub assembly and two in the actual hub assembly. The freehub one felt absolutely fine, the two hub ones though are another matter. Removing the front seal reveals the rubber seal behind is completely rotten so I'll need to replace them. I checked online for replacements and struggled to find a direct replacement until I looked on the Enduro Bearings website and spent a fascinating half an hour educating myself on bearing designations! Turns out the numbers 6902 refer to the size and type of bearing and I could find these with no issue, however, the RS designation was where I was struggling, until a I read it meant "rubber seal" and is quite frankly a bit rubbish. There are much better ways to seal these bearings and soon I realised that the Enduro 6902 llb was not only available for 6 Euros each, but a good upgrade from what I have.
So there we go, I should be able to clean everything up and order these new bearings, just the small matter of working out how the hell I'm going to get the old ones out and also finding a suitable replacement O-Ring for the end cap.