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Re: Dynamo identification

That's right...it should then motor in the same direction it is driven in by the magneto...Ian

email (option): ian@wright52.plus.com

Re: Dynamo identification

Thanks Ian

Last daft question i promise !! I have replaced the field coil and i fashioned a couple of G clamps and a hardwood timber pack inside the dynamo body to compress the coil into the body. I then tightened up the coil screw but no matter what i do i still get a 1/2mm gap between the coil metal core and the body. On assembly the armature spins freely but im sure it cant be right ? Any advise ? Do i need a special tool ?

Thanks again

Ant

Re: Dynamo identification

There is a special tool for compressing the pole shoe (the core) against the body....I'll speak to the chap that used to rebuild my dynamos and get some information on it...I'll post tomorrow.....Ian

email (option): ian@wright52.plus.com

Re: Dynamo identification

The pole shoe compressor tool is like a small scissor jack which is wound up to push the pole shoe against the body...The chap who did my dynamos for years said he'd seen an illustration of one but had never actually seen one...I've also seen the illustration...He made up a small jacking tool to exert the pressure...He also said that even with a tool the screws should be tightened with an impact driver to do them up really tight...
Care should be taken with the short dynamo, that only has a single retaining screw, to ensure the assembly remains square to the axis of dynamo body and doesn't contact the armature....Ian

email (option): ian@wright52.plus.com

Re: Dynamo identification

Many thanks Ian

I woke up at 3.00am this morning wondering if the field coil screw was too long (its a new one) and sure enough its almost a mm longer than the female thread. No wonder i couldnt tighten it up :smiley:

Cheers

Ant

Re: Dynamo identification

:smiley: :smiley: Ron
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email (option): ronpier@talk21.com

Re: Dynamo identification

Spot on, Ron!!
My epiphanies usually occur in my morning shower.

email (option): btcoop77069@aol.com

Re: Dynamo identification

I've had a few like that lately...I've got a problem with my B33 not running correctly after fitting a new engine and after a few days at it I haven't been able to identify the problem yet...So, the brain's working overtime in the early hours...:laughing: ...Ian

email (option): ian@wright52.plus.com

Re: Dynamo identification

Did you forget the pushrods again Ian?:thinking_face: Ron

email (option): ronpier@talk21.com

Re: Dynamo identification

Ha Ha...That was about 40 years ago and it was a B50....If only it were that simple:grimacing: ...Ian

email (option): ian@wright52.plus.com

Re: Dynamo identification

Here is the special screwdriver for the field coil screws. Ron
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email (option): ronpier@talk21.com

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