Now that school's out and I've got some time to pick up on the
1951 Raleigh Clubman project I started back in September, I'm puzzled by the GH6 Dynohub. Two questions for the learned:
1. Now, in that thread, Cudak and Sciencemonster both said that the magnet should cause "surprisingly little drag." Well, that doesn't seem to be the case -- the drag is quite strong. It takes quite a bit of strength to turn, and the wheel will immediately stop spinning if I stop turning it by hand. I thought it might be the bearings, but I've taken the thing apart according to the
SA manual, and the bearings, cones, and cups look great. The major friction is between the magnet and the armature. What could be causing this? Could it be missing a spacer or something? I haven't separated the magnet from the armature, so I don't know whether the Magnet Spacing Ring or the Patent Number Disc are intact. Is there a way to lubricate the magnet/armature?
2. The manual I've been able to find shows a diagram for the 1952+ dynohub, but gives directions for the slightly different pre-1952 dynohub. Does anyone know where I could find a diagram for the earlier model? Going by the written directions, it appears that a "shim washer" might be missing -- but I have no idea what that shim washer might look like, or how wide it would be,etc. This might be related to problem #1. Any ideas?
Thanks a lot,
Brian