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 Post subject: SKB O/U trigger group removal
PostPosted: Mon Sep 28, 2020 9:24 pm 
Diamond Grade

Joined: Thu Jul 15, 2004 1:56 pm
Posts: 1119
SKB model 700 over/under.
Trying to remove the entire trigger group.

A large screw holds this onto the receiver.
This is a large screw that screws into the
front of the tang and secures the trigger group
into the receiver. It is part number 709301
on this schematic: https://www.skbshotguns.com/schematics/Schem_J-OU.jpg
It has a small lock screw that holds it in place, part 709302, like the screws
on floor plates of German 98 mauser rifles. The small locking screw comes
out easily.

I can't get the large one out. It is frozen.
I broke my screwdriver blade off trying to remove it.

Any suggestions on getting it out?




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 Post subject: Re: SKB O/U trigger group removal
PostPosted: Tue Sep 29, 2020 5:29 am 
Crown Grade

Joined: Mon Jan 23, 2017 9:08 am
Posts: 2292
Location: Central NH
I don't think that the trigger group will come out, even if you do get the screw out.

The safety will still be attached to the inertia block.

That said, get a new screwdriver bit and use an impact driver to shock the screw loose.

https://www.mscdirect.com/browse/tnpla/ ... _kEALw_wcB

available from several sources.


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 Post subject: Re: SKB O/U trigger group removal
PostPosted: Wed Sep 30, 2020 5:58 am 
Diamond Grade

Joined: Thu Jul 15, 2004 1:56 pm
Posts: 1119
The safety is not connected to the trigger group.
It has nothing to do with removing the floor plate,
trigger group.

My entire problem is that screw will not come out.

The floor plate is held in place by that large screw.
That large screw had a narrow slot for the screwdriver.
The slot is so narrow only a knife edge type screwdriver
will fit in. The thin weak screwdriver blade breaks when
trying to loosen the screw. I made the screw slot wider so
that I could get a stronger fatter screwdriver in, still could
not get it loose. Tried my impact driver, that did not loosen
it either. I soaked it for several days with penetrating
oil, still no success. I am going to send it to SKB
for removal. All in all, a really crappy outcome, having
to send a gun away, shipping both ways, and labor to
have screw taken out and new one put in. It is going
to take at least a hundred dollars to remove the floor
plate, that is held in with one screw. It does not get
any more annoying than this.


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 Post subject: Re: SKB O/U trigger group removal
PostPosted: Wed Sep 30, 2020 6:47 am 
*Proud to be a*
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Joined: Fri Feb 15, 2008 5:22 pm
Posts: 11007
Location: Athens,TX.
New one on me didn't know SKB had detatchable trigger groups.

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TSRA LIFE MEMBER
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Rose City Clays - Tyler TX
5H Shooting Sports Frankston TX ( Formally the Chicken Ranch)
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 Post subject: Re: SKB O/U trigger group removal
PostPosted: Wed Sep 30, 2020 11:14 am 
Diamond Grade

Joined: Thu Jul 15, 2004 1:56 pm
Posts: 1119
hopper810 wrote:
New one on me didn't know SKB had detatchable trigger groups.

Yep, part number 709300 for the 12 gauge.

picture of schematic:
https://www.skbshotguns.com/schematics/Schem_J-OU.jpg

Picture of the floor plate, note the large hole on the right end, that is where the screw connects it receiver.
https://www.gunpartscorp.com/products/791100A


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 Post subject: Re: SKB O/U trigger group removal
PostPosted: Wed Sep 30, 2020 11:48 am 
Diamond Grade

Joined: Thu Jul 15, 2004 1:56 pm
Posts: 1119
I talked to SKB gunsmith, Rob. He gave me great advice. 1st, they have no replacement screws that hold the floor plate in. Told me how to go about fixing what I really wanted to troubleshoot without removing the floor plate. Guess I will proceed as if I don't have a removable floor plate. SKB really does give good customer support.


Last edited by JoeCool on Wed Sep 30, 2020 2:56 pm, edited 1 time in total.

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 Post subject: Re: SKB O/U trigger group removal
PostPosted: Wed Sep 30, 2020 11:50 am 
*Proud to be a*
*Proud to be a*

Joined: Sun Feb 18, 2007 11:22 am
Posts: 8971
Location: Rochester, NY
Why does it need to come out?

_________________
S3 Smingler Shotgun Sports
Ian Smingler
585-613-8098
[email protected]
http://www.sminglershotgunsports.webs.com

Manufacturer of Custom Brass Barrel Weights for over/under, top single, and unsingle shotguns.


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 Post subject: Re: SKB O/U trigger group removal
PostPosted: Wed Sep 30, 2020 2:55 pm 
Diamond Grade

Joined: Thu Jul 15, 2004 1:56 pm
Posts: 1119
I was having intermitent fail to fire on lower barrel. I wanted to remove lower firing pin, retainer, return spring, then inspect them, clean the area and replace whatever needed replacing. Removing the floor plate makes that job a piece of cake. Also removing the floor plate SHOULD be a piece of cake. The work-around that Rob gave me was to:
(1) Drop the hammers,
(2) Remove hammer springs,
(3) Remove hammer pivot pin,
(4) Remove hammers,
Now you have pretty good access to the firing pin area, not as good as you would have if you just swung out the entire floor plate in one piece, but there is enough access to then get my trouble shooting done.
Rob's guess was that I had a broken firing pin, and he gave me the logic of why he thought that, when I told him what it was doing.
Inspection of the parts found the pin to be okay, but the return spring was really tired, and barely backed it up into position to give the hammer a good long drive on it. So I replaced the firing pin spring.
Don't know if that fixes it, next time to the range will answer that. That fixed the fail to fire.


Last edited by JoeCool on Sun Oct 18, 2020 6:49 am, edited 1 time in total.

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 Post subject: Re: SKB O/U trigger group removal
PostPosted: Thu Oct 01, 2020 7:03 pm 
Crown Grade
User avatar

Joined: Thu Nov 27, 2008 2:26 pm
Posts: 3404
JoeCool wrote:
hopper810 wrote:
New one on me didn't know SKB had detatchable trigger groups.

Yep, part number 709300 for the 12 gauge.

picture of schematic:
https://www.skbshotguns.com/schematics/Schem_J-OU.jpg

Picture of the floor plate, note the large hole on the right end, that is where the screw connects it receiver.
https://www.gunpartscorp.com/products/791100A




The trigger group on my Ithaca/SKB Model 700 may be removeable as indicated in the schematic during disassembly but, I don't consider it to be "detachable" in the same manner as a Perazzi or Z-gun.

FWIW, SKB did, however, offer their Competition Trap and Skeet Models 4000, 5000, 6000 and 8000 with detachable/interchangeable trigger groups on the German market during 2007 and 2008. Frankonia Jagd offered these models with prices ranging from Euro 3799,- for base model 4000 up to the elaborately master engraved model 8000 astronomically priced at Euro 33350.-.

DF

Montani Semper Liberi


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 Post subject: Re: SKB O/U trigger group removal
PostPosted: Sat Oct 10, 2020 11:28 pm 
Tournament Grade

Joined: Sat Apr 10, 2010 6:02 pm
Posts: 160
Location: Mountain Home, ID
I've had good luck using this kit.
https://www.brownells.com/gunsmith-tool ... 25476.aspx

I've worked on a couple SKB's like yours, used the large bit from this kit. If you have an electric soldering iron/ gun, you could put the tip on the screw and heat it up, sometimes they put locktite on the threads and the heat will help break it loose. Good luck!


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 Post subject: Re: SKB O/U trigger group removal
PostPosted: Sun Oct 18, 2020 6:46 am 
Diamond Grade

Joined: Thu Jul 15, 2004 1:56 pm
Posts: 1119
I doubt that anyone put locktite on mine. It has a specific locking screw that keeps the main screw from loosening. Besides blue lock-tite, the kind used for threads has never stopped me from removing any screw. I had the proper screwdriver that fit properly with correct size, and it broke the bit, correct screwdriver did not help. Talking to SKB they recommended leaving it on there and just fix it while attached, because they no longer had replacement screws for the floor plate on Japanese SKB guns, the screw that is in there is now pretty banged up and mangled from having the impact driver beat on it for awhile. So I fixed it without removing the trigger, although it is a bit more trouble to work on while installed. Then I found the screw at Numrich and bought it. Now I got a screw to replace it, SKB said they could do it for me, no problem, if I had the screw. The gun also just broke a hammer that needs replacing so I am sending it to them. Hammer replacement on this model requires the sear also be replaced, and someone specifically skilled at this in more in line with my thinking, so it is going to SKB shortly for a good overhaul.




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