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-   -   Parker Repro Loose Screw (https://parkerguns.org/forums/showthread.php?t=21117)

Gary Laudermilch 03-22-2017 09:01 AM

Parker Repro Loose Screw
 
The repro I use to shoot clays frequently has a screw that is continually getting loose. It is the smaller screw immediately in front of the trigger guard bow. I tighten it as much as I feel I dare and it still comes loose. It is a double trigger gun if that makes any difference. Why? Suggestions?

Dean Romig 03-22-2017 10:32 AM

a little dab of thread locker should cure it. But don't use the permanent type.





.

edgarspencer 03-22-2017 06:44 PM

Quote:

Originally Posted by Dean Romig (Post 214890)
a little dab of thread locker should cure it. But don't use the permanent type..

That would also have been my suggestion. Loctite makes a "Red" and "Blue", and I can't remember which is the one with less strength. Any good autoparts store will have both, and know which is which.
As I recall, Carquest has their own, and they are also red, and blue, but Something reminds me they are the opposite from Loctite brand.

charlie cleveland 03-22-2017 07:10 PM

a small dab of your wifes finger nail polish will work good for loose screws also...it is fairly easy then to break screw loose if it is needed...charlie

Kirk Potter 03-22-2017 07:16 PM

Quote:

Originally Posted by edgarspencer (Post 214904)
That would also have been my suggestion. Loctite makes a "Red" and "Blue", and I can't remember which is the one with less strength. Any good autoparts store will have both, and know which is which.
As I recall, Carquest has their own, and they are also red, and blue, but Something reminds me they are the opposite from Loctite brand.

Pretty sure its blue that would allow you to be able to remove it again.. Had to use some on my Garands rear site.

Bill Jolliff 03-22-2017 09:10 PM

Kirk is correct.

Locktite BLUE is temporary. Locktite RED is permanent.

Gary Laudermilch 03-23-2017 06:49 AM

Thanks for the loctite solution. However, I was as much interested in the "why" it keeps loosening. Is there something out of sorts internally that is working that screw? If so, maybe it can be corrected.

WmRike 03-23-2017 08:34 AM

Is the slot properly timed when you tighten it down?

Gary Laudermilch 03-23-2017 09:29 AM

Yes, the screw is perfectly timed when tight.

Brian Dudley 03-23-2017 10:39 AM

It is likely a matter of harmonics on recoil.

Paul Ehlers 03-23-2017 12:44 PM

I have the same problem with the same screw on my repro 16/20 set. I tightened it a couple of times & finally used some low strength Loctite to solve the issue.

Be sure if you use a thread locker to clean the screw & hole so it is grease/oil free. Then use very little Loctite, just a small drop off the head of a tooth pick is all that's needed on a screw like this. The biggest mistake people make with Loctite is they use too much of it & create a bigger problem than they are trying to solve.

edgarspencer 03-24-2017 08:01 AM

Quote:

Originally Posted by Paul Ehlers (Post 214938)
The biggest mistake people make with Loctite is they use too much of it & create a bigger problem than they are trying to solve.

That's the truth. A while back, I bought a gun and wanted to remove the stock to send up to Chris Dawe. The top tang screw would only turn so far till it stopped. Turned out, a previous owner had used loctite to keep the screw timed, instead of fitting a new screw, or shimming beneath the tang to keep it tight. They obviously used way too much loctite, and when they put the screw back in, managed to cement the screw to the threaded sleeve in the stock. Turning the screw was also turning the sleeve until it came up hard on the underside of the tang. All is well now, but it took a wrench on the screwdriver shank and some serious effort to break the cement bond. New screw, properly timed, now fitted.

Charles Shelton 03-24-2017 06:27 PM

That same screw on my 20 repro disappeared while shooting doves. I had never noticed it being loose.
Guess I need to replace it.

Gary Laudermilch 03-24-2017 08:38 PM

Ok, so my problem is more than an isolated occurrence. What exactly does that screw retain? What function does it serve? Yes, I looked at the schematic available via the homepage technical tab and that is about as clear as mud. Is there an exploded view somewhere that I cannot seem to find?

edgarspencer 03-24-2017 11:31 PM

Gary, The floorplate (trigger plate) is held to the receiver with those three screws, forward of the triggers, and tang screws behind the triggers. With that one screw loose or missing, I doubt the trigger plate will move downward. When you cock the gun, The cocking slide moves forward and the pressure of the hammer springs could want to move pushing against the trigger plate, but the whole assembly is quite rigid, with two tang screws and the two forward trigger plate screws.


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