a lovely rideout, but not charging

What year is the bike?

Obviously a single but what model?

Mike

Yes he does do dynamos. I sell dynamo regulators.  aoservices.co.uk

Really knows his stuff and is a nice chap to boot. I ordered a pair of brushes from him yesterday.

He has sorted out a couple of dynamos for me in the past. No internet but ring him on 0121 559 2405

Have you tested the dynamo, or are you assuming total failure simply because it is not charging? 

When I finally got my Dominator going, the dynamo failed to charge, and it turned out to be a dirty commutator.  Give yours a clean, and don't forget to clean the brushes, and make sure they are making good contact with the commutator.  While you are at it, have a look for displaced solder from the commutator.  If OK so far, but no charge, test for continuity between adjacent segments in the commutator.

Also look for loose wires in the charging circuit, or breaks in any wires.

I have copies of period dynamo servicing instructions and can send them if you need.  Let me know. 

When I was trying to sort my charging problems out, several people just told me to replace the Lucas CVC unit with an electronic regulator.  There were in fact four faults, and only one of them related to the voltage control unit - t was delivering too much voltage to the battery.  The commuator was dirty, there was an intermittent short caused by a damaged wire, and a rather unfortunate piece of metal contacting the ammeter terminal.  You have to probe around and find the actual fault, not simply blame a component without checking.

Paul

Looking at the original posts its obvious that the armature has dissintegrated structurally. Its necessary to read through the posts carefully if you are not going to make yourself look silly. I should know,as I am guilty of this too!.Paul does make a valid point ,Faults are rarely as simple as first thought.

My Rudge is running without a dynamo drive as it can cause horrible damage to the alloy primary case if it seizes up and snaps or throws a chain. A charged battery powers the stop light and I am not interested in riding at night.

you can run without the dynamo. You'll even gain a little bit of power!

Nice Beeza, Devon registration too............