Lotus Elan

Lucas horn revitalization

PostPost by: gjz30075 » Sat Dec 13, 2014 12:02 pm

At the risk of offending the modders here, I'll ask the crowd who has revitalized an oem Lucas horn? The one shown (stripped of paint) simply goes 'clunk' when power is applied. I've taken the little bolt on top up and down with no change. I've removed the big bolt on top, sprayed WD40 down the hole, sprayed WD40 into the snout but it still simply goes 'clunk'.

I see two options: Soaking the whole thing in some sort of fluid to loosen up the innards or grind down the rivets holding the halves together to be able to split it apart to fix it.

Any other ideas?

Thanks,

Greg Z
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PostPost by: Type28 » Sat Dec 13, 2014 12:15 pm

Hi Greg,

Check the battery you are using is fully charged. I have car with the same horn and it only works when the engine is running, and revving above 1500 rpm. With the engine switched of it clunks.
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PostPost by: gjz30075 » Sat Dec 13, 2014 12:58 pm

Good point: I forgot to mention that when I applied power to the horn, it was a direct connection to a fully charged battery.
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PostPost by: john.p.clegg » Sat Dec 13, 2014 2:53 pm

Greg

Grasp the nettle...drill out the rivets..

John :wink:
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PostPost by: DJ908 » Sat Dec 13, 2014 7:16 pm

I would suggest you do as John has suggested, drill the rivets and then follow the instructions as per this link
http://www.sabutler.com/tr6hornrepair.asp

I have restored several sets of horns. They look and work just fine.

Robert
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PostPost by: Bill » Sat Dec 13, 2014 7:56 pm

Hi all

After 50 years of putting up with the useless and inadequate horseless carraige hooter I replaced them with a compact air horn assembly, the small (5 in. cube) that incorperates the compressor, horn and relay in a nice unobtrusive package. The first advantage is there is no lag in operation that I found occurred with spooling up of the normal piped together systems - AND - they are loud! - Cheap as well.

Remember what Mr. Lucas always said - don't go out after dark!!

To my mind an acceptable upgrade for 26/0538

Bill
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PostPost by: RichC » Sat Dec 13, 2014 8:39 pm

connect it up . tap it with a hammer , if that doesn't work whack it with hammer .
let us know how u get on...
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PostPost by: el-saturn » Sat Dec 13, 2014 10:56 pm

Mr. Lucas ---------------------------- don?t go out at night: he didn?t even consider our pop-ups -- he lives in klosters switzerland where i have met him skiing, going uphill (t-bar) and tlaking about loti and other LESS IMPORTANT british brands - a real nice chap: about 85, but goin strong sandy, hardly any lucas parts!
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PostPost by: billwill » Sun Dec 14, 2014 1:07 pm

If it just goues CLUNK, the assumption is that the contacts are not openning inside.

Check this by connecting it through the 10 Amps range of a multimeter

I wrote a description of fixing it here but the URL quoted above:
http://www.sabutler.com/tr6hornrepair.asp
is much better, so I removed mine.

~~~~~~~

You would only want to actuall try to fix this if you are mad keen on originallity, because more or less the same types of horn are readily available nowadays.
Bill Williams

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PostPost by: gjz30075 » Sun Dec 14, 2014 2:00 pm

I read the writeup posted for the TR6 horn and this is the route I'm going. A bit too much going on now with the holiday season so I'll tackle this early next year. Do you realize 'next year' is only a few weeks away?

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PostPost by: pharriso » Mon Dec 15, 2014 9:50 pm

Timely posting Greg... One of mine is dead as well... She's just gone into storage so one of those over winter jobs..,
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PostPost by: CBUEB1771 » Tue Dec 16, 2014 6:20 pm

There is always the good preproduction part route:
http://www.holden.co.uk/displayProducts ... =Horns+12v
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PostPost by: pharriso » Tue Dec 16, 2014 6:45 pm

CBUEB1771 wrote:There is always the good preproduction part route:
http://www.holden.co.uk/displayProducts ... =Horns+12v


Russ, I wonder if Holden's part is metal (like the original part) or a cheap plastic re-production?
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PostPost by: gjz30075 » Tue Dec 16, 2014 8:44 pm

It certainly looks the part.

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