Several days of fettling last week:
Firstly I had a go at the Kingpin. Shortly after getting it I discovered that the front hub had probably never been serviced. What little grease was in there was like glue and pretty much the whole bearing track on the cones was pitted. At the time I just regreased to keep them going but recently I took a punt on the cones from a hollow axle conversion kit being a decent enough match to work. The cones
are ideal but unfortunately I hadn't banked on the original axles being a smaller diameter than the 9mm standard. I had a suitable axle and the fork dropouts needed some filing to make it fit. After an adjustment to the rear hub as well the bike felt smoother to ride on a short test and I look forward to trying something a bit longer in the near future.
Next up was
@gavgav's Genesis which I had in for a service. As suspected, the chain was worn and a new cassette was also wanted as it had been marginal last service. Front brake pads were replaced last time and still have plenty of life left but the rears were nearly worn out so some new ones went in. The front hub looked almost as though it had only been serviced last week so I just rebuilt it with fresh grease. The rear hub though wasn't as good with the drive side being the colour of congealed blood.
The winter has not been kind to it and there is damage from water ingress. Rebuilt with new balls and grease I'm confident it'll go to the next service at least, but in the slightly longer term I think it'll be needing a new hub not simply the cones.
I put in new gear cables and after adjustment everything worked beautifully on the stand, however on a road test there was an odd creaking noise that I traced back to the beginnings of chain-suck on the small chainring so it'll need a new one of those as well (on order).
With Gav's on hold I turned my attention to my brother's bike. This had a very small pit on the rear non-drive cone at the last service and I've been meaning to fit a replacement. I actually ordered an axle assembly which made for a very easy swap and it runs as smoothly as a brand new hub again.
Hopefully I can get Doug out to do some test miles on it fairly soon.
For what it's worth; I couldn't find a complete axle or the drive-side cone in stock for this Shimano Deore T610 hub. After much research, the axle parts from the Deore M590 are a match even though they don't all appear on Shimano's interchangeability listing.