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 M-Type Dynamo Alignment Tool / Mandrel		  Forum Locked  Topic Locked
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mharnden

United Kingdom
18 Posts
Posted - 29/12/2021 :  16:24:14  Show Profile
Hi,

I hope some kind owner out there will be able to help me out.....

I need to realign the vertical dynamo drive on my M-Type and I am searching for the alignment tool / spigot / mandrel that is necessary for completing this work.

Does anyone have one that I can borrow / buy...or even just a drawing of one so that I can have one made.

Thank in advance for any offers of assistance.

Matt
Edited by - mharnden on 29/12/2021 16:49:05

Roger Cadogan

United Kingdom
490 Posts
Posted - 30/12/2021 :  11:43:11  Show Profile
Hi Matt, There is another way of doing it that may be considered more accurate. Simply screw an appropriate adaptor on the top of the dynamo and attach a dial indicator to it to get the alignment spot on. I have used the method many times with total success and no problems or failures over many years. With patience you can achieve concentricity to very fine limits.





Roger
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mharnden

United Kingdom
18 Posts
Posted - 30/12/2021 :  12:50:57  Show Profile
Excellent Roger. Thank you for the hint!
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Blue M

United Kingdom
1461 Posts
Posted - 30/12/2021 :  21:37:12  Show Profile
Why would this centering be necessary? I've heard of it obviously but never had to do it.
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bernard.scott

United Kingdom
193 Posts
Posted - 31/12/2021 :  11:45:52  Show Profile
Matt

This Octagon Heaven link is good background.

https://www.triple-mregister.org/OctagonHeaven/Articles/211.pdf

The alignment bar is 1.375 inch or 1 and 3/8 inch diameter available from suppliers such as metals4u. 35mm diameter is close. It does work well but not as precisely as using instruments.

Bernie
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Onno

Netherlands
1031 Posts
Posted - 31/12/2021 :  12:18:18  Show Profile
Ian
The block, front housing and head do not always line up perfectly.
Especially when mixing and matching castings originally not belonging to one engine the misalignment can wreak havoc on the vertical drive.
Realignment and fitting new locating dowels can be needed

Onno "J,D,M" Könemann
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Blue M

United Kingdom
1461 Posts
Posted - 04/01/2022 :  07:54:12  Show Profile

So it's mainly if new parts are used.
Thanks Onno.
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