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 Post subject: A400 cleaning
PostPosted: Mon Nov 30, 2015 7:58 pm 
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Joined: Fri Jan 29, 2010 6:53 pm
Posts: 184
Location: IN
Does anyone clean the exhaust valve assembly on the A400

How often, what is a good tool to use for dis assembly

I've never had a problem but one of the guys at the club has after 4-5,000 rounds

thanks

logguy




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 Post subject: Re: A400 cleaning
PostPosted: Mon Nov 30, 2015 8:21 pm 
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Joined: Wed Mar 03, 2004 12:53 pm
Posts: 13112
Location: Michigan
I'd do it at least once a year or right after the gun gets really wet. A good hook wrench would work well. There are also tools that you can buy from gun part stores made for removing this nut.


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 Post subject: Re: A400 cleaning
PostPosted: Tue Jan 05, 2016 5:45 pm 
Field Grade

Joined: Fri Aug 03, 2012 6:49 pm
Posts: 92
Location: Austin, Texas
33logguy

Contact Jim Bellegarde of Cole Gun. His email is address is Jim Bellegarde <[email protected]>.

He can tell you all about maintaining the exhaust gas valve. Cole Gun makes a spring kit for the A391 which also works for the A400 - the kit comprises two gas valve springs (one lighter than the factory spring and one heavier). This allows you to adjust the amount of gas pushing on the piston, thereby obtaining proper "bolt speed". They also make a "wrench" (actually a socket) which fits the gas valve nut to allow for easy removal of the nut. The socket is a bit pricey.
If you're just a shooter, you probably don't need any of this. If you like to tinker with your gun, this may be a worthwhile investment for you.

Talk to Jim, he's the expert.

Good shooting. George


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 Post subject: Re: A400 cleaning
PostPosted: Sun Jan 10, 2016 8:06 am 
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Joined: Mon Jan 05, 2015 11:08 am
Posts: 781
Location: Foothills of the Great Smoky Mts.
Here's a tool kit for that purpose:
http://www.standardamericanproducts.com ... unkit6.htm

I haven't bought one and would probably devise my own...if and when the time comes.

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 Post subject: Re: A400 cleaning
PostPosted: Sun Jan 10, 2016 9:12 am 
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Joined: Tue Jan 08, 2008 6:20 pm
Posts: 22940
If you ever run into Mike Sherman from PMS, I believe he carries that same kit.

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 Post subject: Re: A400 cleaning
PostPosted: Sun Jan 10, 2016 12:22 pm 
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Joined: Sat May 07, 2005 9:20 am
Posts: 140
Location: Castle Rock, CO
You can make one out of a 15mm 12 point socket if my memory is correct.


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 Post subject: Re: A400 cleaning
PostPosted: Mon Jan 11, 2016 8:38 am 
Presentation Grade

Joined: Thu Jul 15, 2010 10:14 am
Posts: 612
The manual says NEVER DISMANTEL THE EXHAUST VALVE ASSEM. R U SAYING IT IS OK TO TAKE APART AND CLEAN LIKE THE 391? Ron


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 Post subject: Re: A400 cleaning
PostPosted: Mon Jan 11, 2016 4:41 pm 
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Joined: Fri Aug 03, 2012 6:49 pm
Posts: 92
Location: Austin, Texas
The folks at Cole Gun say that Beretta just doesn't want anyone but themselves or their service centers to mess with the gas valve for liability concerns. I remove the gas valve myself, and if you know what you are doing you'll cause no problems. But, I guarantee you that there are people in this world who shouldn't operate a wheelbarrow, much less mess with the A400's gas valve.


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 Post subject: Re: A400 cleaning
PostPosted: Mon Jan 11, 2016 5:03 pm 
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Joined: Fri Apr 22, 2011 10:46 am
Posts: 8423
Location: Colorado Springs, Co
vonrichthofen wrote:
The folks at Cole Gun say that Beretta just doesn't want anyone but themselves or their service centers to mess with the gas valve for liability concerns. I remove the gas valve myself, and if you know what you are doing you'll cause no problems. But, I guarantee you that there are people in this world who shouldn't operate a wheelbarrow, much less mess with the A400's gas valve.


"You can't fix stupid."


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 Post subject: Re: A400 cleaning
PostPosted: Sat Dec 26, 2020 3:24 pm 
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Joined: Mon Apr 02, 2007 7:53 pm
Posts: 237
Location: Sonoma, CA
Yes the manual says not to disassemble the gas spring pressure relief valve. BUT, it does easily come apart and is very similar to a Beretta 391, but with fewer parts. Once you do ir or see it done you'll wonder why in the world they ever asked you not to. The first time I removed the nut it might have been pretty tight, but now it comes apart exactly as you would expect it to. It's definitely faster and easier to disassemble and reassemble than a 391, especially if you have the "Valve Wrench" (actually more of a socket) attached to a cordless screwdriver-like tool.

One source for the wrench (socket) is https://www.shop.colegun.com/products/3 ... lve-wrench

That link includes the text:

Cole's Custom Gas Valve Wrench
To be used with 391, A300 Outlander and 12g A400 (not compatible with A400 Lite) model Berettas.
NOTE: Cannot be used in 3 1/2" chambered models




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