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Remington Fieldmaster 572 pump 22;won't activate trigger

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Copper BB
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Joined: Thu Jul 19, 2018 9:54 pm
PostPosted: Thu Jul 19, 2018 10:10 pm
I have older 1955 remington 572 pump 22; not shot much in last 15 years;now when I pump a cartirige into the chamber sometimes it won't go in completely and the trigger is not armed. This will also happen when the gun is empty and I activate the pump it will not set the trigger. Any ideas to what part I should replace ?
It is intermittent problem. Today I went to gun range to sight in my scope and it worked good with LR Hollow points for about 20 shots and then it started to not activate the trigger. Sometimes it worked and then it was so bad that I quick firing and came home. Any ideas ??
Usually I will eject the round and try to pump in new round and really jam the forearm hard so it will set the round and activate the trigger. Sometime I need to eject and load 3 or 4 times before it will load the round and activate the trigger.
Sometimes the ejected 22 round is bent because I used so much force to close the chamber!
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PostPosted: Fri Jul 20, 2018 11:26 am
My first question is when was the last time the rifle was cleaned, and not "just" the bore but the internals? Take it apart (use the owners manual which is available online) and give the gun a good clean and light lube. Then see if the issue repeats. You could have fouling from some dirty 22 ammo like CCI Blazer. The floating chamber on these (used to accommodate Shorts, Longs and Long Rifle) needs to be kept clean and lubed.
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20g
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PostPosted: Fri Jul 20, 2018 5:11 pm
This is the reason I prefer bolt actions. Less bullsh**. By the way good info Scorpion8.

Copper BB
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Joined: Thu Jul 19, 2018 9:54 pm
PostPosted: Sat Jul 21, 2018 12:13 am
Thank you Scoprion 8==I didn't know what the floating chamber did ,but I noticed it was sticky. I will clean it and lube it and see if that helps.
The pump action looks like it worked, but it does not go in completely.
If the floating chamber is worn or broken will it work better if I try short loads and not the LR hollow point ?
Can I buy a new 'floating chamber" ?
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PostPosted: Sat Jul 21, 2018 5:35 pm
I had a floating chamber in one of Practical Solutions 22lr Mac 10 machinegun conversion uppers.

It worked pretty well, but wasn't as reliable as I had hoped.

Numrich gun parts often have a lot of different parts for many different makes and models.
When people ignorant of guns make gun laws, you end up with ignorant gun laws.
-Me

Now I know they're not so ignorant and it's ATRRITION
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PostPosted: Mon Jul 23, 2018 1:38 pm
I own a few of the Remington S-L-LR capable models and they all shoot well and function reliably as long as they are kept clean and lightly used. It is not much of a difference maker anymore, but as a kid in the early 70's when a box of Shorts was $0.10 and a box of LRs was $0.25, you had a lot more fun shooting Shorts. And more skill was needed to be accurate with them. But too many of these gun models were "shot-alot" and put away years ago as we grew, had other priorities, got families, and so forth. Clean that Fieldmaster up, clean it well, and give it a light lube of RemOil or BreakFree CLP.

I'm sure Numrich has the parts, but I'll bet you just have sticky old oil in there and a lot of grime from dirty 22LR rounds like Thunderbolt or CCI Blazer. Man, I recall when you got a brick of Blazer for $9.99, or $6.99 on sale. Used to shoot a LOT of that stuff. And, of course, used to clean guns a LOT.....
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.410
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PostPosted: Sat Jun 15, 2019 1:40 pm
One the old wives tales about the 552 that is false is it has a floating cartridge chamber, I had forum members tell me it needed cleaning, I spent the better part of a couple hours spinning my wheels looking for the non-existant part.
Thats like telling a kid to go down to the lumberyard and bring back a board strecher in wood shop class.
The 552 and 572 do not nor ever had a floating chamber.

If you check the parts diagram for them on Numrich you will not see it illustrated nor listed.

The carbine williams designed Remington model 550 does have a floating chamber. See Item 50 in the model 550 parts breakdown.

The model 550 uses a floating chamber to fire shorts, longs and long rifles.
Later on Remington engineers came out with another semi-auto that can fire shorts, longs and long rifles by using a light weight bolt and recoil spring to cycle the shorts, the heavy rubber buffer is to soak up the excessive recoil that results from firing the higher velocity ammunition.
They chose to use a design that was economicly feaseable, easier to make a light weight bolt and light springs to fire shorts, the easily mass produced rubber buffer was cheaper to make than the machine time to make the floating cartridge chamber.
Cleaning a 572/552 was supposed to be easier than cleaning the 550 series like 550-1, 550-1a


The 572 and 552 Disconnector position.
Quite a few posts on different forums about nicked up bolt guides , boogered firing pin's with burrs even on the on the hammer, some posts about wobbly hammer causing side binding, still others on dirty and worn sear notch fit, and then there was this odd post that seemed to jump out at me reguarding a misassembly that can cause all sorts of mayham.

Gun Hub forum post by nctorberson Feb 02, 2014*· reply #4

Quote: 'disconnector is above the small lever that allows hammer tocock before the trigger resets. It must be below it'

http://gunhub.com/rimfire/58339-remingt ... ssues.html

That got my attention and now Im all fired up to tear that thing back open to check it again, according to gun hub there was a posted photo but that is only viewable to Gun Hub members.
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PostPosted: Mon Jun 17, 2019 2:26 pm
Rex in OTZ wrote:[b]One the old wives tales about the 552 that is false is it has a floating cartridge chamber, ....


Well, seems ya learn something everyday. I read that somewhere many years ago on how Remington rimfires were able to accommodate, loaded in any order, Shorts, Longs and Long Rifles. If I'm wrong, then I stand (or am sitting right now) corrected.
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PostPosted: Mon Jun 17, 2019 7:52 pm
Rex in OTZ is 100% correct.
What could have happened... did.

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