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T/C tumbler swap?

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I have a late 70's T/C Hawken with a broken tumbler and therefore no longer half cocks.
The only tumblers I see on eBay say they are for Cherokee,Seneca and Patriots. Ads say NOS and 70's made.

Will these fit my Hawken?

thanks.......John
 
John an option is l&R rpl lock but it is alot of work to retrofit as I understand. I have also heard that a lyman tumbler may work but I could be wrong. Maybe someone who knows can weigh in.
\
SM
 
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I believe there is significant differences in the internals of large and small TC locks.

I have put a Lyman tumbler in a TC lock. It went right in but did require a bit of filing to the square shank before the hammer would go on.
 
So back to my original question.

Will a tumbler from a Cherokee, Seneca or Patriot fit my percussion Hawken?
None of the eBay ads for T/C tumblers list the Hawken, just the other three.

Thanks.............John
 
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TC was very much into standardizing their manufacturing.
There might be somebody nearby you that could bring their piece over for visual examination to settle your question.
 
I can end this discussion and guess work. No, they are not compatible and will not interchange. Both locks to include internal’s are two different animals.

I have both and the tumblers are indeed different.

Respectfully, Cowboy

Then it looks like I need to find a tumbler for a Hawken, Renegade or New Englander size lock?
And pass up on tumblers for Cherokee, Seneca or Patriot locks?
Correct?

John
 
Saw one for the full-size TC locks on evil-bay for 38 bucks.

There was also a complete lock listed for about 2 dollars more.
 
I took the tumbler out of my Hawken and discovered a very, very small setscrew in it.
When I removed it, I can see no reason for it to be there.
What is it for?
The only screw that I’m aware of existing on a tumbler was for sear nose adjustment. Could adjust how much of the sear nose you wanted to rest within the full cock notch of the tumbler. Gave the shooter the option of a lighter trigger pull if so desired? To much of an adjustment could create an unsafe situation by merely bumping the muzzleloader when the lock was at full cock. Hammer could fall unintentionally?

Only seen this spring loaded screw on a lot of CVA models. Also seen a couple of Russ Hamm lock’s with this feature as well.

I’ve personally never seen a TC model with this screw in the tumbler before?

Respectfully, Cowboy
 
I might only add, If you do have a TC lock, and it does have a screw on the tumbler? It’s been modified to replicate CVA’s or older Russ Hamm lock tumbler’s.

Also, never seen an allen head screw used before either?

Lastly, If you screw in, you push the sear nose out of the full cock notch towards the notches edge, thus reducing area space that the nose of the sear rests on when the lock is fully cocked. This creates a lighter pull needed using your firing trigger to trip the sear nose free of the tumbler notch, thus firing your rifle.

To adjust this screw, I visually observe how much of the sear nose is resting in the full cock notch of the tumbler. If your firing trigger pull is to heavy you turn a quarter of a turn to half turn inbound. Again check the sear nose/tumbler contact. Definitely don’t want the edge of the nose resting on the edge of the tumbler notch!

After you adjusted and are happy with your lightened trigger pull, go ahead and push on the back of the hammer with your thumb forcefully with the lock fully cocked? If the hammer falls, you need to back off that screw! Repeat process until you can’t drop the hammer using thumb pressure. Take some finger nail polish and dab on the screw to prevent it from working loose.

Respectfully, Cowboy
 
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