Hammers on Lifter gun not set right

[Taylor Heiner]

Update: I just removed the tumbler and this is what it looks like. The shaft itself is not twisted so that crosses that off. I still can’t tell if that shaft and tumbler are made as one piece or if the shaft is fit inside. I know on some guns that shaft is threaded but I don’t want to mess around and break anything. Does that shaft look to be lined up correctly?

[B. Dudley]

The tumbler is all one piece.

[Aaron Beck]

Maybe the square shaft or even hole was built up with weldment and when fit back the angles were just a bit off.

[Taylor Heiner]

Quite possible. This is the tumblers side by side. The picture doesn’t do a great job but you can see the square shafts are off. All the rest of the geometry is correct

[Dean Romig]

Do they both have the same three-digit number stamped on them?






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[ArtS]

The last picture shows the problem. Now as to the fix.....

[Taylor Heiner]

There are no numbers on either of the tumblers, the closest numbers are on the bridles, locks, and hammers and they all match

[Steiner]

Just a thought but I'd check the firing pin for proper length and shorten it a little if it would still function properly. It may not be the original firing pin.

[Taylor Heiner]

Update: I definitely found the problem. Upon closer inspection, There appears to have been a stress crack at the base of the square shaft and that weakened it and allowed it to shear/twist at the base of the square end. Only the end is affected, and I can definitely see a small twist at the very base. I can probably repair this but does anybody happen to have a left tumbler laying around they would be willing to part with? That sure would be easier.

[B. Dudley]

Good to see you found the issue.

I have many tumblers on hand.