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Did you know straight away after? I forded a river over the weekend that didn't actually submerge my hub but alot of water got thrown up.
Anyone know how to regrease an SP dynamo hub?
plxarc-
Nope, the first 'incident' was the end of August, rode it on until he second big dunk mid-October, gave it a rinse in the shower then it sat doing nothing until December, only when it was in the truing stand at the LBS was it noticed.
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On servicing...
Are SP hub dynamos user serviceable?
Alas, SP hub dynamos are not user serviceable and indeed we are aware of no hub dynamos that are based on manufacturer’s recommendations. Any attempt to service a SP hub dynamo will void its two-year warranty. We have received quite a number of requests from consumers on how they might service their hubs even accepting that attempting to do so would void their two-year warranty. They accept this risk thinking that this would save the need to disassemble and rebuild the wheel. Unfortunately, the design of SP hub dynamos like that of many other brands requires disassembly of the wheel for bearing replacement. Furthermore, the delicate generator mechanism housed within the hub body must be re-calibrated to tolerances of less than a millimetre each time bearings are replaced. Failure to carry out this operation properly (which is likely without expert knowledge, experience and tools), will generally result in catastrophic failure of the generator mechanism after a period of use. SP engineers have considered making their hubs user serviceable (with much prodding from IDC at the behest of our technically savvy testers). But the expertise and equipment required to carry out recalibration of the generator mechanism each time the bearings are replaced presents a technical hurdle that SP engineers, and indeed all other hub dynamo manufacturers we are aware of, have so far declined to attempt.
atk
Stripped it out and LBS returned it to Ison who exchanged for a reconditioned hub (and I assume sent mine back to Germany to be reconditioned and then used as a replacement for someone else...). I was getting the wheel rebuilt anyway so no big hassle really, there was a bit of a delay as it was sent back just before Christmas and both ISON and LBS were shut for a bit and were waiting for reconditioned hubs to arrive back from Germany with the right drilling etc. all explained up front, probably would have been sorted within a week had it been any other time of the year.
Doing a bit more thinking, I'd forgotten (deliberately?) about a particularly grim stretch of bridleway in Wales where I must have submerged the hub (remember draining shit of of the BB) and another river crossing at 4am which was thigh deep - both times must have seen the hub underwater. The hub was on my 29er and it looks like I recorded 2000km on it (mainly in the Peaks, nice and gritty...) + ???km of regular evening rides at the two local trails for ~18 months, hard to say in total...
I have another SP hub on the road/cross bike - that's done 4000km of "rides" and around 2 years of commuting/errands and is still super smooth.