10 Gauge Under Lifter Hammer Gun Internals

[Dean Romig]

The lock plates come off relatively easily.
After you remove the hammers (and they may require a bit of gentle persuasion) back the lock plates screws out about two or three turns, rap the screw head to push the opposite lock plates free and keep doing that until you can get a thin blade in the space that becomes obvious and work the plate free. Repeat the process as necessary for the other side.
When reassembling be vert careful of the position of the trigger blades or you will bend the thin blades… ask me how I know.

The nose of the lock plates is chamfered to a shelf edge which fits into and under the matching recess in the frame. It will move easily to the rear to allow lifting the plate away.



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[Dean Romig]

Yup, that’s basically it Leon.





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[ArtS]

One other thing to check is the fit oof the hammer on the asle. I have seen quite a few of these guns where the hammer wobbles but the axle fits tightly in the lockplate. The hammer has a square hole and may not match the shaft. Sometimes a washer under the hammer will fix it because the screw is slightly too long and is bottoming out. If this is the case, try swapping the hammer screws side to side. If that doesn't help, use the washer. If these don't work the hammer (or square shaft) can be welded to build up a little metal and then refitted. I would prefer doing the shaft to avoid welding on the hammer.