Originally Posted by
Velocivixen
@
wahoonc- Hi Aaron - Thank you for the additional information. The bike is not yet rideable due to brake pads being hard as rocks, sticky brake cables, gummed up headset, you get the idea. Finished bb, headset (has a "self leveling" upper cup!)? Learned about Raleigh style hub bearings and will re-do/adjust front wheel hubs....
Today I will remove the rear wheel, and per the forum's wisdom, will not take apart the dyno-three hub....yet. I'll clean the externals & reassemble. I understand about the armature & magnet not being separated & have original tech document explaining how to remove to clean with diagram, but at this point, am still not sure about how to get Dino portion away from hub portion without separating the magnet/armature. Until I understand better I won't touch it.
On the dyno-3-three hub, also known as the AG hub.
I understand that you have read
the instructions, so I just want to add the things it does not say, all of which will be obvious to you if you "just do it."
The dynamo unit consists of a circular magnet (held in place in the hub shell by the four long skinny bolts) that surrounds the armature (held in place on the axle by the cone and locknut). When in use, the magnet spins around the armature without touching it; there are no bearings between the two, and
no mechanical friction.
It is easy and safe to remove the dynamo unit from the hub. You do not need to worry about separating the armature from the magnet
unless something goes very wrong (and I'll get to that later). The magnetism of the magnet is the only thing holding the armature in the magnet, but it is quite enough. You do not need to worry about separating them by accident; it takes a bit of force to separate them.
You must remove the dynamo unit from the hub shell in order to overhaul the bearings on the left side, or to open up the geared part of the hub, which is on the right side.
As described in the instructions, after you take the four nuts off the little long skinny bolts, the dynamo unit
should freely fall into your hand when you lift the wheel off. If it doesn't, and if a blow from a mallet doesn't free it up, this is what I'd call
something going wrong. If this happens, don't pull on the dynamo; the parts you can pull on are connected to the armature. By pulling on them you risk separating the armature from the magnet, and this is what you don't want to do. But by emphasizing that you don't want to do this, I don't want to suggest this is likely to happen. It is not likely.