a-5 lifter screws

[1mathom1]

I acquired an A-5 magnum 12 that belonged to my wife's uncle's father in-law. He was a hunter and guns were simply tools and didn't get much special care. Barrel was clean but not much else. Metal is only fair and the screws only show a little ham-handedness. Wood's in decent shape. It has a 30" full choke barrel and he had mounted a red-dot sight on it and the mount was both screwed and epoxied to the receiver. I got it off but there is some staining from the epoxy and the screw hole plugs are unsightly but fitting solid plugs and matching the machining in a Belgian from 1959 would take a special kind of person.
I am in the process of a deep clean. I got the special screw bits from Brownell's and was having pretty good luck till I got to the lifter/elevator screws. The locking screws came right out but the big lifter screws will. Not. Budge.
So tight or stuck that I've bent the bits (but not added any marring to the screws). I've treated them with Kroil and tried but nothing. They're soaking now.
Any suggestions?

 

[swampratt]

Go to a granger or johnstone supply or Lock supply and pick up some Rust Buster.
Or try brake fluid.
Kroil and PB do not penetrate as well and PB blaster just dries too soon to do anything that needs creeping fluid.

Acetone and transmission fluid mixed together is another excellent rust creeping liquid.
Brake fluid is what I use most often because I always have some.

It works 10X better than Kroil or PB

 

[Shadowrider]

Give the kroil time to work. It may take a day. After that it's time for some heat around the female threads.

 

[Sted-E Ed-E]

Pretty strange screws. Hopefully letting some oil penetrate down in the threads will work. Maybe try a hair dryer to heat it up a bit.

 

[Sted-E Ed-E]

Oh yea and can we see???

 

[1mathom1]

Go to a granger or johnstone supply or Lock supply and pick up some Rust Buster.
Or try brake fluid.
Kroil and PB do not penetrate as well and PB blaster just dries too soon to do anything that needs creeping fluid.

Acetone and transmission fluid mixed together is another excellent rust creeping liquid.
Brake fluid is what I use most often because I always have some.

It works 10X better than Kroil or PB

I have both of those on hand so may give that a try. Thanks.

 

[1mathom1]

Oh yea and can we see???

Not much to see right now. It's in pieces on the bench. Here's a shot of the mess that was made with the red dot mount and a pic of the stubborn screw. Promise I did not add that deformation on that screw.

 

[SPDguns]

Bring it over and I'll help ya out.......

 

[1mathom1]

Bring it over and I'll help ya out.......

If I don't get it tomorrow, I'll be giving you a call.

 

[swampratt]

Did Ya tap tap tap on the handle of the screwdriver while trying to turn it.
Or tap then try to turn.