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 Post subject: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Fri Jul 07, 2017 7:20 am 
Tournament Grade

Joined: Sun Jul 24, 2016 1:20 pm
Posts: 119
Location: Kingwood TX
Have had gun 9 months or so and clean the gun regularly including the piston.
I do leave it "dry" after cleaning. Typically use Hoppes.
Noticed that there are 2/3 small holes
Lus large one that I clean with a small brass pick, cannot bring myself to use a drill bit I have seen on other videos.
Was thinking an ultrasonic cleaner
Are there better ways?



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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Fri Jul 07, 2017 9:33 am 
Crown Grade
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Joined: Fri Apr 22, 2011 10:46 am
Posts: 5476
Location: Colorado Springs, Co
fal777 wrote:
Have had gun 9 months or so and clean the gun regularly including the piston.
I do leave it "dry" after cleaning. Typically use Hoppes.
Noticed that there are 2/3 small holes
Lus large one that I clean with a small brass pick, cannot bring myself to use a drill bit I have seen on other videos.
Was thinking an ultrasonic cleaner
Are there better ways?


I put the piston in a container of shooters choice and let it soak for an hour or so.
I also lube the piston as it makes it much easier to clean.
Despite what the manual says, I've never had a FTF in my A-400s in 12 ga with an oiled piston.


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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Fri Jul 07, 2017 3:15 pm 
Diamond Grade

Joined: Sun Sep 18, 2016 9:10 am
Posts: 1125
Hmm lube the piston, interesting. I've always left it dry as well. I think MC7 is a superior solvent and yes a professional US would probably do wonders.
Dr. Duck, do you clean it after every use, or who many rounds do you put through it prior to cleaning? Using a synthetic lube?


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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Fri Jul 07, 2017 3:25 pm 
Crown Grade
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Joined: Fri Apr 22, 2011 10:46 am
Posts: 5476
Location: Colorado Springs, Co
Texas Yankee wrote:
Hmm lube the piston, interesting. I've always left it dry as well. I think MC7 is a superior solvent and yes a professional US would probably do wonders.
Dr. Duck, do you clean it after every use, or who many rounds do you put through it prior to cleaning? Using a synthetic lube?


I clean it when the gun gets sluggish.
I use BreakFree for lube. Hasn't let me down yet!!
I have over a dozen Beretta SAs. 390s, 391s and A-400s.
Having been doing it this way since my first 303.
LIGHTLY lube parts, not dripping wet.


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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Fri Jul 07, 2017 5:51 pm 
Tournament Grade

Joined: Sun Jul 24, 2016 1:20 pm
Posts: 119
Location: Kingwood TX
Dr Duk wrote:
Texas Yankee wrote:
Hmm lube the piston, interesting. I've always left it dry as well. I think MC7 is a superior solvent and yes a professional US would probably do wonders.
Dr. Duck, do you clean it after every use, or who many rounds do you put through it prior to cleaning? Using a synthetic lube?


I clean it when the gun gets sluggish.
I use BreakFree for lube. Hasn't let me down yet!!
I have over a dozen Beretta SAs. 390s, 391s and A-400s.
Having been doing it this way since my first 303.
LIGHTLY lube parts, not dripping wet.


Do,you leave Gas Piston dry or litely lubed?

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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Fri Jul 07, 2017 6:01 pm 
Crown Grade
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Joined: Fri Apr 22, 2011 10:46 am
Posts: 5476
Location: Colorado Springs, Co
fal777 wrote:
Dr Duk wrote:
Texas Yankee wrote:
Hmm lube the piston, interesting. I've always left it dry as well. I think MC7 is a superior solvent and yes a professional US would probably do wonders.
Dr. Duck, do you clean it after every use, or who many rounds do you put through it prior to cleaning? Using a synthetic lube?


I clean it when the gun gets sluggish.
I use BreakFree for lube. Hasn't let me down yet!!
I have over a dozen Beretta SAs. 390s, 391s and A-400s.
Having been doing it this way since my first 303.
LIGHTLY lube parts, not dripping wet.


Do,you leave Gas Piston dry or litely lubed?


Lube it!


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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Fri Jul 07, 2017 6:11 pm 
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Joined: Tue Jan 08, 2008 6:20 pm
Posts: 17339
I leave the piston dry after cleaning; I soak it in a small jar of solvent and then wipe with a patch with Cleanzoil or Safari Charlie's

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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Fri Jul 07, 2017 6:35 pm 
Crown Grade

Joined: Fri Oct 15, 2010 2:24 pm
Posts: 7878
Location: Upstate SC
I keep a small plastic tub with a lid in my garage. (Like the ones you get from Bojangles with a big batch of slaw in them...)

Put the piston in it; put in some mineral spirits; close down the lid and swirl the piston around a bit.

Then hit it a few times with an old toothbrush and swirl again.

Hit it with some compressed air and lube lightly with CLP or RemOil.

It's pretty simple.


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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Fri Jul 07, 2017 8:56 pm 
Diamond Grade

Joined: Sun Sep 18, 2016 9:10 am
Posts: 1125
I'm on it or lets say the wife is on it. I have all those products, no money spent. Talking about a jar of fluid, my wife gets these glass jars with spices that have a fancy lid with a metal latch that compressed a nylon top under the glass, they work great for solvents.


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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Sat Jul 08, 2017 9:36 am 
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Joined: Fri Apr 22, 2011 10:46 am
Posts: 5476
Location: Colorado Springs, Co
VTHokiesDuckHunter wrote:
I keep a small plastic tub with a lid in my garage. (Like the ones you get from Bojangles with a big batch of slaw in them...)

Put the piston in it; put in some mineral spirits; close down the lid and swirl the piston around a bit.

Then hit it a few times with an old toothbrush and swirl again.

Hit it with some compressed air and lube lightly with CLP or RemOil.

It's pretty simple.


Exactly!


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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Sat Jul 08, 2017 5:55 pm 
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Location: Foothills of the Great Smoky Mts.
I would soak mine in Slip 2000 Carbon Killer for 15 minutes...run a .38 cal. bore brush through it...wipe dry... brush the exterior with a soft bronze brush...reinstall it dry.

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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Thu Jul 13, 2017 12:40 pm 
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Posts: 12923
Location: Michigan
RobinTN wrote:
I would soak mine in Slip 2000 Carbon Killer for 15 minutes...run a .38 cal. bore brush through it...wipe dry... brush the exterior with a soft bronze brush...reinstall it dry.

Right here. The Slip melts carbon off like nothing else I've ever used. Plus it smells decent too.

I leave pistons dry on every brand/model.
On the Xplor/Xcel models do lightly lube the outside of the magazine tube but not on the skinny threaded shaft at the end. On the Xtreme models all they way up until where the piston rides on it.


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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Thu Jul 13, 2017 7:54 pm 
Field Grade

Joined: Sun Jul 02, 2017 5:33 am
Posts: 43
I use G96 on the gas piston on my 390-391. When I do clean my Beretta it is much easier to clean after I oil it down each time.

David McMillen


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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Fri Jul 14, 2017 1:12 pm 
Crown Grade

Joined: Thu Jul 31, 2008 11:12 am
Posts: 3491
I keep any area that gets hot gas dry and clean on a Beretta. The only areas I lube are the bolt,breech block, recoil spring/tube, trigger, operating arm and grooves on the inside of the receiver. Hot gas and oil can crud up in a hurry. https://www.youtube.com/watch?v=_6U4FAs51tM


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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Mon Jul 17, 2017 7:46 am 
Diamond Grade

Joined: Sun Mar 12, 2006 5:49 pm
Posts: 1634
Location: St. Louis, MO
It is important to put the cleaned gas cylinder into the gas chamber under the barrel, BEFORE assembling. Failure to do so can damage the outer rings.

I think almost any decent solvent works for cleaning the gas cylinder. I sometimes use paint thinner or gasoline -- both work fine.


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 Post subject: Re: Cleaning Gas Piston Beretta A400- Any Tips?
PostPosted: Tue Jul 18, 2017 1:09 pm 
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Location: Foothills of the Great Smoky Mts.
gold40 wrote:
I think almost any decent solvent works for cleaning the gas cylinder. I sometimes use paint thinner or gasoline -- both work fine.
I use a rotary end brush with an extension to clean the carbon off the gas cylinder's back wall (exhaust valve face). Works the best! Leaves nothing behind. YMMV



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