Surefire KL3 Head Modification

Bub8731

Newly Enlightened
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Jul 9, 2024
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Texas
I have a KL3 that I want to modify with a modern LED and driver. I have been able to get past the red loctite on the bezel but the glass won't move and the back side is inaccessible to my snap ring pliers. I am considering breaking the glass and buying a replacement from lumensfactory. Any advice on how to proceed?
 

F89

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Mar 15, 2014
Messages
1,656
If you can upload a few decent photos to show where exactly you're up to, I can probably give you some advice.
 

Bub8731

Newly Enlightened
Joined
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Messages
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Location
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If you can upload a few decent photos to show where exactly you're up to, I can probably give you some advice.
The front shows the bezel removed and the back shows the 4 holes which I assume are for some kind to tool to latch onto and thread it out which I am unable to reach.
 

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F89

Flashlight Enthusiast
Joined
Mar 15, 2014
Messages
1,656
You need to remove the pill from the back of the head. I'd stay away from the lens end unless you've already damaged it.
I know you said that you can't reach it but you'll need to heat the head to soften the thread locker and use some sort of pliers to remove the pill (from the back of the head.

Below is a picture from a Japanese website which may be helpful.


IMG_6783.jpeg


I've seen a couple of different mods on this head. Some involved the machining of custom heat sinks (triple) and modification for the use of P60.
Personally I think I could use the existing pill and do either a single LED with a reflector or TIR, or even a triple using a copper MCPCB and H17Fx driver.
The P60 route would be pretty simple if all else failed.

I will say that while I've modified a variety of Surefire lights, I haven't done this one.
 

Bub8731

Newly Enlightened
Joined
Jul 9, 2024
Messages
4
Location
Texas
You need to remove the pill from the back of the head. I'd stay away from the lens end unless you've already damaged it.
I know you said that you can't reach it but you'll need to heat the head to soften the thread locker and use some sort of pliers to remove the pill (from the back of the head.

Below is a picture from a Japanese website which may be helpful.


View attachment 64630

I've seen a couple of different mods on this head. Some involved the machining of custom heat sinks (triple) and modification for the use of P60.
Personally I think I could use the existing pill and do either a single LED with a reflector or TIR, or even a triple using a copper MCPCB and H17Fx driver.
The P60 route would be pretty simple if all else failed.

I will say that while I've modified a variety of Surefire lights, I haven't done this one.
Thank you so much for the info! That picture is exactly what I was looking for. I will probably try to stick an H17fx driver in there.
 
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