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Cracked Mainspring

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Flintleather

Gray Whiskers
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Was cleaning my Leman with a L&R Late English and noticed this. I read somewhere that L&R has a upgraded sear and tumbler for the early locks. Has anyone replaced a mainspring on one of these locks without the other parts? Thanks, Flintleather
C11D2894-0AF1-4946-A0A9-91751D98B158.jpeg
 
Was cleaning my Leman with a L&R Late English and noticed this. I read somewhere that L&R has a upgraded sear and tumbler for the early locks. Has anyone replaced a mainspring on one of these locks without the other parts? Thanks, FlintleatherView attachment 131663
They are good folks at L&R. A free replacement mainspring is my guess. I'm told the newer sear is better than the original. Personally, I would send them the lock and let them install the new mainspring and sear. If they send you a spring, you will have to perform a small amount of filing to get the spring into the lock plate.
 
I have dealt with L&R in the recent past and they were great with furnishing a new part no problem or charge. I did send the whole lock to them though. They gave me great customer service. Send the whole lock back in my opinion and let them fix it.
 
Was cleaning my Leman with a L&R Late English and noticed this. I read somewhere that L&R has a upgraded sear and tumbler for the early locks. Has anyone replaced a mainspring on one of these locks without the other parts? Thanks, FlintleatherView attachment 131663
is it a crack or a liner mark from casting? looks like the e latter.
 
I had an L&R Manton lock I bought two years ago as NOS in which the mainspring broke … L&R was great - replaced it for free w an upgraded spring.
 
Was cleaning my Leman with a L&R Late English and noticed this. I read somewhere that L&R has a upgraded sear and tumbler for the early locks. Has anyone replaced a mainspring on one of these locks without the other parts? Thanks, FlintleatherView attachment 131663
Probably been that way to some extent since it was quench hardened from a casting or extrusion seem in it. You will find forged actions with striation layers (seems) in them when cleaning them up for case coloring or bluing job. Square mortise's or cuts are always a weak point for cracks when the part hits the quench water/oil and contracts.
I don't believe I have ever encountered a liner crack in a spring like that. It usually occurs in the turn back area, cross ways.
It makes me wonder if it would continue and ever fail at all ?
 
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Just talked to Tim, gonna send the whole lock because i also have a problem with half **** clearance between flint and frizzen. I either use a 3/4 square bevel down or the 3/4 by 7/8 flint bevel up and they both contact and hold open the frizzen at half ****. Flintleather
 

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