here’s one I prepared earlier
I was up on the roof bright and early to see what I could see of the lunar eclipse.
Zilch. There was a faint glow behind the clouds where the full moon was. The robins were singing fit to burst. It was seriously sub-zero. So I went and gave the bicycle a Serious Looking At.
Last year, the gears froze up in the cold weather, and so I set fire to them. Not a good move, really.
The gears were frozen again yesterday, so I cycled around Bristol in first gear in a snowstorm, which meant that I was going a lot faster than the cars that were queued up on every damn road, but still not very fast. I was looking for the Waxwings that have arrived in Bristol. I was also engaged in Operation Gonk. Which is still Top Secret.
Anyway, it was time to sort out the frozen gear problem. I Googled ‘frozen Shimano Nexus’ and found a few theories, including one that the problem was internal.
This didn’t seem likely, as the problem developed on Saturday morning while I was actually out cycling; and if the freezing were inside the hub, I should have expected it to have got warmer as I pedalled.
So I stripped down the gear change actuating mechanism. There was a fair bit of moisture in there, as you can see from the picture.
So I flushed it all out with WD40, and slathered grease on it, and reassembled it.
Well, here’s hoping.
Edit: that didn’t fix the problem, so I removed the cable, thawed it out, and forced oil through the cable shrouding, using a hydraulic oiler that I just happened to have. Second time lucky! A little dribble of water came out of the cable sleeve when I operated the oiler; then the oil started coming through. I took the bike out last night, and it worked fine.