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  #1  
Old 05-20-2014, 04:58 PM
sabel
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152K Rehab



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Thanks to knowledge here in RFC land I've finely been able to get my first rifle running smoothly. Took a new sear, disconnector, sear/disc spring and hammer.
The hammer had a good sharp sear engagement corner, but the sear was slightly rounded and allowed the hammer to follow the bolt home. Only option was to dress the engagement edge with a diamond file, now functions fine. I know that I've probably gone through the case hardening, my question is can Kasenite be used to re-harden the sear, using a "MAPP" torch, without warping the sear?
I also refinished the stock. The original finished had yellowed and started to check.

Thanks to all
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  #2  
Old 05-20-2014, 05:12 PM
scooter22 is online now
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Don't know about the Krytonite but the gun looks great.
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Old 05-20-2014, 05:32 PM
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So....

It looks great! How does it shoot? I love mine.

How much did that cost? I am trying to "make nice" with a 152K that I bought. I'm new to this and I am full of questions.

What did you pay for the rifle and then the cost of improvements. I filed a retro-mag, ( and I should not have) and I think it is the best gun I own.

Mine came with a scope; just today , I hit a 3" spinner at 60 yards , 60 times in a row. ( For me that is the best I've done. I was resting on the hood of my car)

Asking of the sear: did you find one that was new or did you buy used?

I ask again....how does it shoot?

Good job and good shooting.....BOLTME
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  #4  
Old 05-20-2014, 05:54 PM
damdane
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Outstanding question! Unfortunately I don't have an answer but I have wondered the same myself. Hopefully you have started something here.
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Old 05-20-2014, 06:59 PM
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Don't know about the Krytonite but the gun looks great.

__________________
I'm an old blued steel and wood pusher.
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Old 05-20-2014, 08:00 PM
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Quote:
Originally Posted by sabel View Post
Thanks to knowledge here in RFC land I've finely been able to get my first rifle running smoothly. Took a new sear, disconnector, sear/disc spring and hammer.
The hammer had a good sharp sear engagement corner, but the sear was slightly rounded and allowed the hammer to follow the bolt home. Only option was to dress the engagement edge with a diamond file, now functions fine. I know that I've probably gone through the case hardening, my question is can Kasenite be used to re-harden the sear, using a "MAPP" torch, without warping the sear?
I also refinished the stock. The original finished had yellowed and started to check.

Thanks to all
In a word yes you can... BUT it will most likely leave the sear brittle hard and very prone to snapping in two at the sear pin hole. I don't think you need to ask me how I know this.
Before you try the kasenite route take a fine file and GENTLY see if it will cut the area that you used the diamond file on. If the file won't cut the sear surface, then you did not cut all the way through the case hardening and I wouldn't do anything to the sear, but keep an eye on it.
If the file cuts the sear surface it is time to break out the kasenite or buy a new sear. I'm not sure what metal Mossberg used to make their sears but I believe that it is a high carbon steel, and if it is a high carbon steel you won't need the kasenite to harden it. Just get it cherry red then quickly dunk it into some cold water, and it will be so hard a file won't touch it... BUT it will be brittle hard and will tend to snap like a glass rod. Polish the sides of the sear around the sear pin hole so that you can see the color change and very carefully heat it until it turns blue, but no more than that. At that point the brittleness should be eliminated. Heat the sear ONLY in the area of the sear pin hole and do not let the blue color get the business end of the sear or you will have wasted all your efforts. However a new sear would not be a bad idea!!! Keep us posted on this!!!
God Bless, Frank.

Last edited by tfrank; 05-20-2014 at 08:03 PM.
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Old 05-20-2014, 08:30 PM
scooter22 is online now
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Very informative Frank. I gotta send you a thumb drive. I forgot to.
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Old 05-20-2014, 08:33 PM
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Smile Well...

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Very informative Frank. I gotta send you a thumb drive. I forgot to.
Well the offer still stands!!!
God Bless, Frank.
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Old 05-20-2014, 08:45 PM
scooter22 is online now
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I think I have your addy somewhere in my PMs. Or you could send it again to a lazy guy.
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Old 05-20-2014, 08:57 PM
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PM sent!!!

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I think I have your addy somewhere in my PMs. Or you could send it again to a lazy guy.
PM sent!!! You have mail!!!
God Bless, Frank.
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Old 05-20-2014, 09:26 PM
scooter22 is online now
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Old 05-20-2014, 10:08 PM
foxfirejem
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Quote:
Originally Posted by scooter22 View Post
Very informative Frank. I gotta send you a thumb drive. I forgot to.
I sent tfrank a thumb drive and he loaded it up with some very good info. Might need to send it to him again for an update.

James
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  #13  
Old 05-21-2014, 01:11 PM
sabel
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Thanks for the response.
The rifle was for my 11th birthday in 1957. It functions quiet well, I haven't been able to get it sighted in yet, I need to get an old El Paso vintage Weaver K6 that I have mounted. That ought to be a good combination. I also went through the bolt tune that was posted in the stickies. Unfortunately the sear face can be touched with a fine file. I purchased the sear and disconnector from Havlines. I am aware of the process of drawing the temper from a hardened piece of steel. At least I now have a spare sear to practice on.

Thanks for the help and comments.
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