Son 28 dynamo hub not producing electricity after crash

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HobbesOnTour
Posts: 410
Joined: 20 Feb 2017, 5:12pm

Son 28 dynamo hub not producing electricity after crash

Postby HobbesOnTour » 26 Mar 2020, 3:02pm

Hi folks,

After an encounter with a drain my 4 year old Son 28 hub seems to be not producing any power.

After having the front wheel straightened there was no power to either the front light nor my USB charger.

I connected another light using a new connector & wires with a similar result.

Hub seems to be rolling as normal, just no power.

Anyone have any suggestions on anything to try before sending it back for repairs?

Many thanks

Brucey
Posts: 37282
Joined: 4 Jan 2012, 6:25pm

Re: Son 28 dynamo hub not producing electricity after crash

Postby Brucey » 26 Mar 2020, 4:03pm

test the windings for continuity, using a multimeter.

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

HobbesOnTour
Posts: 410
Joined: 20 Feb 2017, 5:12pm

Re: Son 28 dynamo hub not producing electricity after crash

Postby HobbesOnTour » 26 Mar 2020, 4:36pm

Brucey wrote:test the windings for continuity, using a multimeter.

cheers

Thanks, but I have no idea what the windings are.
Access to a multimeter is unlikely at the current time. :)

tim-b
Posts: 1191
Joined: 10 Oct 2009, 8:20am

Re: Son 28 dynamo hub not producing electricity after crash

Postby tim-b » 26 Mar 2020, 4:37pm

Hi
It might be worth following up on the five-year warranty. I realise that it may not be a warranty claim but there may be some goodwill going, and it's conceivable that the drain and the failure aren't linked https://nabendynamo.de/en/service/repairs/
Those things are well-built and unless the hub has obviously suffered damage you might be lucky
Regards
tim-b
~~~~¯\(ツ)/¯~~~~

backnotes
Posts: 109
Joined: 16 Jan 2011, 8:36am

Re: Son 28 dynamo hub not producing electricity after crash

Postby backnotes » 26 Mar 2020, 7:08pm

Do you know for sure that the replacement light and wires you were trying work (e.g. works on another hub)? If it is a Schmidt Edelux light, are you sure it's on the “always on” setting rather than the “on when it’s dark” setting if you are trying it in daylight? I have been caught out by that in the past - forgot there were two settings because I generally have it on all the time.

If you can’t get a multimeter or test the light, I have a spare "old skool" Schmidt E6 I know works on a spare Schmidt hub with spade terminals (just tried it). I’d be happy to post this light to you as a test rig known to work - as long as I get it back! I haven't used it for about 12 years, so I can probably live without it for a few days.

HobbesOnTour
Posts: 410
Joined: 20 Feb 2017, 5:12pm

Re: Son 28 dynamo hub not producing electricity after crash

Postby HobbesOnTour » 26 Mar 2020, 9:20pm

backnotes wrote:Do you know for sure that the replacement light and wires you were trying work (e.g. works on another hub)? If it is a Schmidt Edelux light, are you sure it's on the “always on” setting rather than the “on when it’s dark” setting if you are trying it in daylight? I have been caught out by that in the past - forgot there were two settings because I generally have it on all the time.

If you can’t get a multimeter or test the light, I have a spare "old skool" Schmidt E6 I know works on a spare Schmidt hub with spade terminals (just tried it). I’d be happy to post this light to you as a test rig known to work - as long as I get it back! I haven't used it for about 12 years, so I can probably live without it for a few days.


I'm pretty sure that the light worked as it was in a small bike repair shop where I got the wheel straightened. We also used a multimeter there and there was nothing. My own light was definitely on.

It's very kind of you to offer your old light, but I'm currently on a bit of a tour and I think it's a bit far to send :)

In fact, that's the main problem - do I send the hub back to Germany via the only agent where I am for a possible repair, not knowing how long that will take in the current climate or do I look for a replacement either locally or have another sent over. Probably an idea to replace the rim at the same time.

I'm currently in a lockdown situation so I do have the luxury of time.

Many thanks for your help!

HobbesOnTour
Posts: 410
Joined: 20 Feb 2017, 5:12pm

Re: Son 28 dynamo hub not producing electricity after crash

Postby HobbesOnTour » 26 Mar 2020, 9:23pm

tim-b wrote:Hi
It might be worth following up on the five-year warranty. I realise that it may not be a warranty claim but there may be some goodwill going, and it's conceivable that the drain and the failure aren't linked https://nabendynamo.de/en/service/repairs/
Those things are well-built and unless the hub has obviously suffered damage you might be lucky
Regards
tim-b

Unfortunately I know for certain that it was the drain! The dynamo was working right up until I fell in! :)
I understand about their repairs but at the moment it's a long way away and I'd like to see if there's anything simple to be done before I send it away.
Many thanks

backnotes
Posts: 109
Joined: 16 Jan 2011, 8:36am

Re: Son 28 dynamo hub not producing electricity after crash

Postby backnotes » 27 Mar 2020, 10:34am

Sorry - didn't realise you were on tour, and had since checked the windings continuity, making both my suggestions less than relevant!

I had a SON that was ruined by a puddle that turned into a lake. In normal times the turnaround if you send a hub back to Schmidt for repair / refurb is really impressive - mine came back like new via the UK agent (SJS) in less than a week. I was lucky on timing, as they sent things off in batches once a week.

Good luck with your interrupted tour!

HobbesOnTour
Posts: 410
Joined: 20 Feb 2017, 5:12pm

Re: Son 28 dynamo hub not producing electricity after crash

Postby HobbesOnTour » 27 Mar 2020, 3:52pm

backnotes wrote:Sorry - didn't realise you were on tour, and had since checked the windings continuity, making both my suggestions less than relevant!

I had a SON that was ruined by a puddle that turned into a lake. In normal times the turnaround if you send a hub back to Schmidt for repair / refurb is really impressive - mine came back like new via the UK agent (SJS) in less than a week. I was lucky on timing, as they sent things off in batches once a week.

Good luck with your interrupted tour!


I'm grateful for your input, thank you.

If I was at home I'd have no qualms about sending it back to Germany, but on a (stalled) trip it opens a huge number of variables, mainly to do with timing - what do I do if I'm ready to move on (or have to move on) and my hub is somewhere in transit?

In the big scheme of things a non generating hub is a small problem.

I was holding out for "Something similar happened to me and after a few weeks the dynamo kicked back in!" type answer! :D

Thanks again

User avatar
ConRAD
Posts: 667
Joined: 20 May 2010, 10:55am

Re: Son 28 dynamo hub not producing electricity after crash

Postby ConRAD » 28 Mar 2020, 7:02am

Well, in a lockdown situation with no multimeter but plenty of trime, you stiil can check you dynamo in the following way:

Image

HobbesOnTour
Posts: 410
Joined: 20 Feb 2017, 5:12pm

Re: Son 28 dynamo hub not producing electricity after crash

Postby HobbesOnTour » 28 Mar 2020, 3:19pm

ConRAD wrote:Well, in a lockdown situation with no multimeter but plenty of trime, you stiil can check you dynamo in the following way:


I remember doing similar with batteries in my youth! :D
Thanks!

Carlton green
Posts: 521
Joined: 22 Jun 2019, 12:27pm

Re: Son 28 dynamo hub not producing electricity after crash

Postby Carlton green » 28 Mar 2020, 6:17pm

HobbesOnTour wrote:Hi folks,

After an encounter with a drain my 4 year old Son 28 hub seems to be not producing any power.

After having the front wheel straightened there was no power to either the front light nor my USB charger.

I connected another light using a new connector & wires with a similar result.

Hub seems to be rolling as normal, just no power.

Anyone have any suggestions on anything to try before sending it back for repairs?

Many thanks


It looks like you’re stuck with a Hub who’s repair isn’t locally available to you. Personally I’d expect a good unit to not be damaged in your accident (should withstand such things). Anyway your only way forward is replacement or repair by the manufacturer so best send it off when you can. In the meantime, as a temporary measure, bottle Dynamo’s are both cheap and readily available, and if all you need is some occasional night time light then they work well enough to get one by. That’s not as nice a solution as a working hub Dynamo but it’s a lot simpler than buying a cheap replacement hub Dynamo, maybe a set of spokes too, and rebuilding your wheel ... or some similar variation.