By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale Jan 24th

C.A.V Dynamo Question?

All Topics | Latest Posts

Search for:  in Thread Title in  
Rik Parkinson11/09/2019 16:19:14
1 forum posts
5 photos

Hi Everyone

Sorry I am a complete novice at this.

Unfortunately my father passed away, and we’ve been clearing out the garage.

We found this, which I believe is a Dynamo but it seems to be a special one used as a teaching aid?

Anyone any ideas where I could try and sell this and anyone any links to any online so I can start to price it up and get the correct specifications for the listing?


Thanks in advance. Rik


Edited By JasonB on 11/09/2019 17:53:51

Diogenes11/09/2019 18:33:13
37 forum posts
6 photos

Hi Rik, welcome to the forum. I'm surprised no-one else seems to have got here first, maybe they're not home from work yet..

It's a CAV alternator, I imagine supplying 24v and judging from the connector on the back using a screened cable so probably of military origin - perhaps for fitment to a communications vehicle, but I wouldn't rule out an aircraft.

I've no real idea of the age - CAV were part of Lucas for decades, and I think are now part of Prestolite, an American auto-electrical concern.

I wouldn't be surprised to find that someone here knows exactly what it is from.

The Part No. CAV AC5B246M doesn't yield much from Bing except for some bearings in Gdansk, but did throw up a company in Preston called DFJ Auto who handle replacements for CAV alternators - they may be able to help you with further information regarding the intended fitment.

I imagine in terms of value, it's really more of a curiosity/item of historical interest than anything, although the sectioning has been carried out very nicely - a military vehicle auction might be a good bet to find the right kind of customer, or simply go the online route and see what it makes..

Wait and see whether anyone else responds with better information - good luck with the sale

Phil Whitley11/09/2019 18:52:14
1149 forum posts
145 photos

Hi Rik and welcome,There are collectors of cutaway engineering items out there, could be a good ebay item.


martin perman11/09/2019 20:02:36
1812 forum posts
78 photos

I will make an educated guess and suggest it was made in the 70's as I served my apprenticeship with Lucas CAV and the Diesel fuel injectors where I worked were made and fitted with similarly designed spec plates.

Martin P

not done it yet11/09/2019 20:04:51
4505 forum posts
16 photos

It is only a teaching aid or for demonstration, not operational, so only of interest to a very limited market. I doubt it would make much on epay - unless two individuals particularly wanted it.

Good luck in finding a buyer.

Howard Lewis13/09/2019 23:27:31
3149 forum posts
2 photos

It looks to be a sectioned AC5 alternator. The 24 probably signifies 24 volt. With the outlet being for shielded cable, perhaps the M signifies Miliitary.

The Despatch Number would allow traceability to the exact specification.

Sorry not to be able to offer more, but like Martin, my activities were Fuel Injection related rather than electrics, Warple Way factory produced electrical items, although the Diesel Lab, Electrical Lab, Materials Lab and Test Beds were in the same building in the next road, with the two locations connected by an underground tunnel.

Probably of little commercial value, and only of interest to someone who either collects sectioned models, or f Electrical equipment. Is there a CAV Heritage group who may be interested?


Nick Clarke 314/09/2019 14:45:30
686 forum posts
21 photos
Posted by martin perman on 11/09/2019 20:02:36:

I will make an educated guess and suggest it was made in the 70's as I served my apprenticeship with Lucas CAV and the Diesel fuel injectors where I worked were made and fitted with similarly designed spec plates.

Martin P

Would that be in Sudbury?

martin perman14/09/2019 15:05:09
1812 forum posts
78 photos


Yes it was, 4 year engineering apprenticeship, 5 year day release, eleven years as a machine tool fitter/maintenance Foreman.

Worked on everything in the factory.

Martin P

Nick Clarke 314/09/2019 19:11:59
686 forum posts
21 photos

Martin personal message waiting for you

martin perman14/09/2019 19:31:03
1812 forum posts
78 photos


All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
Allendale Electronics
Eccentric July 5 2018
Eccentric Engineering
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest