I have a couple of questions about this hub but first, a bit of background info...
I have recently acquired a beautiful (to me) 1949 Rotrax Vel d'Hiv track frame. It's still in the UK, waiting for me to pick it up on my next visit home but my mind is already on the build
26 Alpine & 25inch Rotrax 022 by Dawes-man, on Flickr[/IMG]
The fork crown is drilled for a brake but not the seat stay bridge. That would normally be fine as I bought it intending to use it as a fixed gear, as it was made to be used. However, due to a series of fatal accidents involving the fashionable riding brake-less track bikes on the streets the police have started to come down hard on anyone caught without brakes front and back and have started issuing on-the-spot $650 fines for anyone they catch. It's a very public campaign with prominent coverage on TV and in the press.
In the UK a fixed gear is regarded as a brake (as indeed it is - 1 : a device for arresting or preventing the motion of a mechanism usually by means of friction 2: something used to slow down or stop movement or activity) but in Japan the police are arguing that a brake is a device affixed to a bicycle, although it hasn't been argued in court yet.
As I'm not about to drill a hole in the lovely seat stay bridge on this frame, and I don't want to hide it with alloy plates to mount a brake, I've decided to go with a hub brake. There is a Sturmey Archer 2-speed fixed hub from the 30s with a brake that would be my first choice but are very, very rare. Then this came up on eBay, an NOS 1938 Sachs Torpedo:
IMG_7620 by Dawes-man, on Flickr[/IMG]
How it lasted 73 years in this pristine condition is anyone's guess but it seems to have done so in Hungary, where I bought it from. I can't help looking at that eagle and imagining a swastika in the orb. It's really weird. I don't think I could bring myself to use it if there was but it doesn't seem the Nazis ever appropriated this particular view of an eagle.
It is a beautiful thing with very obviously thick, lustrous chrome, even on the dust cover, in much cheaper mild steel in later hubs. The dust cover even has a felt ring inside, which would have been oiled or greased in order to better keep dust out. Some pics:
IMG_7621 by Dawes-man, on Flickr[/IMG]
I have another 3 later Torpedo hubs, from the 60s and 70s, so I already have the smaller of these 2 c-spanners in this shot:
IMG_7622 by Dawes-man, on Flickr[/IMG]
After taking the axle-nut off, the small c-spanner removes the knurled nut. Then the only thing you can undo from there is what looks to be a smaller version of the ball-ring on a Sturmey Archer. In this shot you can see the felt-lined dust cover:
IMG_7623 by Dawes-man, on Flickr[/IMG]
IMG_7624 by Dawes-man, on Flickr[/IMG]
Now the questions:
1. Do I actually need to take the hub apart to clean it and regrease everything? Or would it be enough to just flush the hub with oil until it stopped coming out dirty? I think I do, not least in order to regrease the bearings.
3. If I do take the hub apart, the only way to secure the hub would be by securing the brake lever but I'm worried that doing this would over-apply the brake and damage it somehow. I know that the way of securing a Sturmey Archer is by putting its flange in a vice but I don't want to risk damaging the chrome. Perhaps I should lace the hub into a wheel and then undo the 'ball-ring' against the spokes, which is the way I've found easiest with SA hubs.
4. The locking ring in the above photo is threaded anti-clockwise as it serves as a lock-ring of the fixed gear type. However, the inner, non-chromed side looks like a bearing race. Any thoughts on that? Is it perhaps meant to 'wedge' the cog in place? The hub takes a standard Sachs/SA/Shimano 3-dent cog.