UltraTac K18 Brass doesn't work. Replacement doesn't work!

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ykb
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UltraTac K18 Brass doesn't work. Replacement doesn't work!

Hi folks,

I bought a brass UltraTac K18 from a HK-based seller of flashlight Equipment. When it arrived, it didn’t work. I used alkalines, rechargeables, and 10440 cells. I tried single click, double clicks, and long clicks. None made a difference.

I emailed the seller who sent a replacement. This one doesn’t work 95% of the time, ie. no light when the button is pressed. The other 5% of the time when it does work, the light is flickering especially on med & high modes. If I switch it off, there is a high chance the flashlight won’t work the next time I try to switch it on.

I’ve emailed the seller for a refund if I return both flashlights.

I’m beginning to think I’ve overlooked something. Have I? Maybe you can help, please.

Thanks for reading Smile

deleted-200707
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stretch the spring in the tail???

ykb
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CRX wrote:
Retaining ring in the head tight?
I tried it tighten it then tried to loosen it (in case it was on too tight) but it wouldn’t budge either way. Thanks for the suggestion though Thumbs Up

chinooker wrote:
stretch the spring in the tail???
When I removed the spring, I noticed the battery tube was dirty inside especially at the very bottom. I gave it a clean with contact cleaner then reassembled everything. When I switched it on, the flashlight worked! Also, no flickering! Without your advice, I wouldn’t have looked down there. Many thanks Thumbs Up Thumbs Up

This solved the problem with the replacement flashlight. The first one is still as dead as a dodo. For now at least, one is working as it should be, and I’m happy with that Smile

deleted-200707
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very happy it led to a partial solution for you
the flickering indicated to me a possible connection issue which I’ve had before on a copper A01

I have/had 4/6 of these lil K18 powerhouse midgets
I had one SS arrive DOA and had it replaced promptly
the rest are brass, which all butt one I removed the lacquer from to promote the patina
I like antique (suits my persona)

One I killed entirely by leaving it in acetone overnight(lazy)
DON’T EVER DO THAT!
it dissolved the switch cover and who knows what all plastic parts inside

Dobtruckers
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Maybe you can help me too. I have the opposite problem.

I got an Ultratec K18 and it was great for a week. Now it won’t shut off. I unscrew it and of course it goes off, but as soon as I go to put it back together it lights up as soon as the head and body make contact. Once assembled, no pattern of switch clicks will get it to shut off:(

Repeated “contact us” attempts to get a an answer have been answered with dead silence!

Customer service?? NOT

Dennis

deleted-200707
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I have not run into that problem, yet.
If the contact area in the head is clean, then I’d guess a faulty switch.

Did you contact the seller? Luckily, the one DOA I had was purchased in the USA and they, (Going Gear), made good on it.
Someone on here tore one of these apart and modded the shit out of it. IIRC, the switch was a bitch to get out and was replaced.

Dobtruckers
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I did the eraser trick on the inside of the head and the bottom of the battery to no avail.

Unfortunately, my light came from Hong Kong and I’m waiting for a reply from the vendor,

chinooker wrote:
I have not run into that problem, yet.
If the contact area in the head is clean, then I’d guess a faulty switch.

Did you contact the seller? Luckily, the one DOA I had was purchased in the USA and they, (Going Gear), made good on it.
Someone on here tore one of these apart and modded the shit out of it. IIRC, the switch was a bitch to get out and was replaced.

ohaya
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Dobtruckers wrote:
I did the eraser trick on the inside of the head and the bottom of the battery to no avail.

Unfortunately, my light came from Hong Kong and I’m waiting for a reply from the vendor,

chinooker wrote:
I have not run into that problem, yet.
If the contact area in the head is clean, then I’d guess a faulty switch.

Did you contact the seller? Luckily, the one DOA I had was purchased in the USA and they, (Going Gear), made good on it.
Someone on here tore one of these apart and modded the shit out of it. IIRC, the switch was a bitch to get out and was replaced.

According to this:

http://budgetlightforum.com/comment/848883#comment-848883

it should be relatively easy to remove the pill (use a pair of tweezers in the slots on each side and unscrew). If you can get that out, then you can maybe look for shorts or something?

Dobtruckers
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I’ll wait to hear from the place I bought it from before I dive in looking for a short. Thanks for the link.

Dennis

ohaya wrote:
Dobtruckers wrote:
I did the eraser trick on the inside of the head and the bottom of the battery to no avail.

Unfortunately, my light came from Hong Kong and I’m waiting for a reply from the vendor,

chinooker wrote:
I have not run into that problem, yet.
If the contact area in the head is clean, then I’d guess a faulty switch.

Did you contact the seller? Luckily, the one DOA I had was purchased in the USA and they, (Going Gear), made good on it.
Someone on here tore one of these apart and modded the shit out of it. IIRC, the switch was a bitch to get out and was replaced.

According to this:

http://budgetlightforum.com/comment/848883#comment-848883

it should be relatively easy to remove the pill (use a pair of tweezers in the slots on each side and unscrew). If you can get that out, then you can maybe look for shorts or something?

deleted-200707
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here is the thread where the guy dismantles a brass K18
http://budgetlightforum.com/node/47493

Dobtruckers
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Thanks chinooker.

I’ve been notified by the seller in Hong Kong that they are sending me a replacement. Hopefully they do, it works and it lasts more than a week.

Thanks for your help guys,

Dennis O’Brien