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Austinsevenfriends
1927 Chummy #6 Dynamo removal - Printable Version

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RE: 1927 Chummy #6 Dynamo removal - Nick Salmon - 24-10-2019

Here is the locating bolt B - and a suitably small oiler. If I drill right down through the bolt with a small bit and then drill a larger diameter part way in order to press fit the oiler, will this do the job satisfactorily?


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RE: 1927 Chummy #6 Dynamo removal - Parazine - 24-10-2019

Should be fine. Tricky bit will be finding the right diameter drill to get a good press fit on the oiler, I'd try it out on a non-important bolt first.

I'll try and find and attach a picture I have of an original "Bolt B" when I get home.

RE: 1927 Chummy #6 Dynamo removal - David Witton - 24-10-2019

Nick  Heating the aluminium housing with a hot air gun once relevant fixings have been removed will help if the dynamo is stubborn

RE: 1927 Chummy #6 Dynamo removal - Nick Salmon - 24-10-2019

Thanks Dave - it came out without difficulty. Now I am trying to understand why someone would go to the expense and trouble of having the engine rebuilt and then put the dyno in with leads connected to the brush carriers - but two brushes non-existent! No wonder there is no charge...
Thanks Parazine, that would be very helpful.

RE: 1927 Chummy #6 Dynamo removal - Parazine - 24-10-2019

Here you go. 


The hexagon is 1/4 Whitworth and the thread is 7/16 BSF. Total length 3/4", plain part 1/4", thread 1/4", hexagon 3/16", oiler sticks out 1/16".

Plain part is 1/4" dia., hole is 1/8" dia.


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RE: 1927 Chummy #6 Dynamo removal - David Cochrane - 26-10-2019

Wouldn't it be easier just to buy one off the shelf? See BG8/9 here: www.a7c.co.uk/spares.php#electrical

RE: 1927 Chummy #6 Dynamo removal - Nick Salmon - 28-10-2019

Sheer genius David  Big Grin 

Many thanks. I shall be in touch...