We would like to ask you not to return any non-disc-wheels with oil leaking problems during the summer season.
Please inform the customer that leaking oil does not damage the hub, in fact we guarantee that hubs run perfectly well and without causing any damage for more than 1 year or more than 5000 km. We recommend an oil change after that period but mainly to fill up on oil, not because the old oil would cause any damage.
In fact, oil leaks tend to 'mend' themselves after some time. We ask for your understanding that during the Summer seasons, we only have time to service really serious faults on the hubs to keep our turnaround times short.
Please check on your hub whether all housing screws (8) and axles screws (5 or 6 depending on type) are present and tight, and whether the oil changing set screw is tight. Please let us know if the hub leaks on the cog side. In that case we'll send you a screw with a solid sealing-gel around that should seal the leak.
In case of DB hubs… (do you have one for a tandem? probably not, so I skip that bit).
For non-disk hubs that may still be leaking by autumn/winter, we will of course offer our services, as always quick and mostly free of charge :)
Hope that helps a bit
Sven