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FCU Tear Down
Shane Offline
#1 Posted : Saturday, October 04, 2008 5:08:48 PM(UTC)
Shane

Rank: Advanced Member

Joined: 9/12/2008(UTC)
Posts: 49

I have put over 3000 rounds through the Sig now and decided it was time for a good cleaning so today I got brave and completely stripped the fire control unit. Following the directions posted by Thrak on the Sigforum it was really pretty easy.
It was surprisingly clean but I gave each part a good soaking and closely examined everything for damage, didn't see any problems.

While I had it apart I polished the trigger and the backside of the hammer.

Lookin good BigGrin





Update: I finally got around to adding pics to my website along with a description of each step for disassembling and reassembling the FCU.
Click Here
equality72521 Offline
#2 Posted : Saturday, October 04, 2008 11:36:41 PM(UTC)
equality72521

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Man, that looks good!
Two questions: What's your solvent of choice?
And did you have a hard time getting the mainsprings back into the hammer?
I have "detail stripped" mine except for the hammer assembly. I just haven't been brave enough to go that far yet.

The polished hammer and trigger are killer!
Shane Offline
#3 Posted : Sunday, October 05, 2008 3:05:52 AM(UTC)
Shane

Rank: Advanced Member

Joined: 9/12/2008(UTC)
Posts: 49

I have been using Hoppes No. 9. It's cheap and does a good job, picked up a quart of it the other day for 12 bucks.

I was worried about the mainsprings too but it was very easy. I just took a wooden dowel and tapered the end of it so it was just slightly bigger than the large spring, then I sanded one side of the taper flap which gave room for the pin to slide over the springs. It work great and a lot cheaper than ordering some special tool like the other guys have been doing. BigGrin


I have posted a lot more pics of the tear down HERE.
Hawk Offline
#4 Posted : Sunday, October 05, 2008 4:11:28 AM(UTC)
Hawk

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Think I should start a new section called "Pimp my P250". Shane would be the King of that section. Looking good Shane!!
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THE Sig P250 Owner's Forum
ss355 Offline
#5 Posted : Monday, October 06, 2008 7:03:58 AM(UTC)
Rank: Member

Joined: 9/9/2008(UTC)
Posts: 27

Shane, did you polish any of the engagement surfaces on the trigger or trigger bar? Just curious of any of your work had an effect on trigger pull.

Great pics, BTW. Thanks for posting them.
doug Offline
#6 Posted : Monday, October 06, 2008 11:39:28 AM(UTC)
Rank: Member

Joined: 9/9/2008(UTC)
Posts: 18

Will the shine on the rear hammer area create a blind spot in certain lighting conditions? Isn't that area better being dull?
Shane Offline
#7 Posted : Monday, October 06, 2008 12:18:59 PM(UTC)
Shane

Rank: Advanced Member

Joined: 9/12/2008(UTC)
Posts: 49

ss355 wrote:
Shane, did you polish any of the engagement surfaces on the trigger or trigger bar? Just curious of any of your work had an effect on trigger pull.

Great pics, BTW. Thanks for posting them.

Nope, I just polished the sides and back. The trigger is very smooth and I didn't want to mess anything up.

doug wrote:
Will the shine on the rear hammer area create a blind spot in certain lighting conditions? Isn't that area better being dull?

Good question, I hadn't thought about that. Guess it could if the sun was down low and directly behind ya.
Shane Offline
#8 Posted : Sunday, November 02, 2008 3:38:55 PM(UTC)
Shane

Rank: Advanced Member

Joined: 9/12/2008(UTC)
Posts: 49

I finally got around to adding pics to my website along with a description of each step for disassembling and reassembling the FCU.
Click Here
newsig Offline
#9 Posted : Monday, November 03, 2008 3:24:15 AM(UTC)
newsig

Rank: Advanced Member

Joined: 9/16/2008(UTC)
Posts: 64

Great post. Did a complete tear down following your instructions and detailed clean. Thanks.
wkderf Offline
#10 Posted : Tuesday, February 24, 2009 6:22:52 AM(UTC)
Rank: Member

Joined: 2/6/2009(UTC)
Posts: 26

hey shane,

did u change the link location for your FCU teardown instructions? i can seem to find it.
Shane Offline
#11 Posted : Tuesday, February 24, 2009 7:04:55 AM(UTC)
Shane

Rank: Advanced Member

Joined: 9/12/2008(UTC)
Posts: 49

Nope, should be the same.

Here it is again http://www.shanewhitlock...hoto/v/leather/sig/fcu/

My host was doing some maintenance yesterday so the site was down for a while but should be working now, let me know if ya have any problems.
wkderf Offline
#12 Posted : Tuesday, February 24, 2009 4:53:29 PM(UTC)
Rank: Member

Joined: 2/6/2009(UTC)
Posts: 26

ahh, that explains it. it works fine now, thanks!
kcnwea Offline
#13 Posted : Wednesday, March 18, 2009 3:43:07 PM(UTC)
Rank: Advanced Member

Joined: 12/11/2008(UTC)
Posts: 45

i noticed what looks like to be some pitting of some sort while cleaning my pistol tonite, i was wondering if anyone has seen anything similar, excuse the pictures i was having a hard time getting them into focus.
¡Me duce tutus eris!
kcnwea Offline
#14 Posted : Tuesday, March 24, 2009 2:49:39 PM(UTC)
Rank: Advanced Member

Joined: 12/11/2008(UTC)
Posts: 45

anyone???? guess i should have started my own thread...
¡Me duce tutus eris!
Hawk Offline
#15 Posted : Wednesday, March 25, 2009 4:49:47 AM(UTC)
Hawk

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Joined: 8/26/2008(UTC)
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Location: Buford, GA

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Probably should have. Or they are too busy looking at your avatar and can't focus on your posts, lol. I don't have that on mine. What cleaner are you using?
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THE Sig P250 Owner's Forum
kcnwea Offline
#16 Posted : Wednesday, March 25, 2009 12:46:50 PM(UTC)
Rank: Advanced Member

Joined: 12/11/2008(UTC)
Posts: 45

i was using some stuff called kleenbore formula 3 from a cleaning kit. now i'm using hoppe's # 9. i'm pretty sure its not the cleaning product.
¡Me duce tutus eris!
dosborn81 Offline
#17 Posted : Monday, May 18, 2009 1:23:05 AM(UTC)
dosborn81

Rank: Uber Member

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Man
Location: Springfield, MO

Thanks: 1 times
Nice work Shane!!!

kcnwea, mine is like that and has been since new. It's all good.
"I don't like repeat offenders, I like dead offenders." Ted Nugent
gumby Offline
#18 Posted : Wednesday, July 29, 2009 4:32:50 PM(UTC)
Rank: Advanced Member

Joined: 7/29/2009(UTC)
Posts: 88

Just joined and these pics will help this newbee. Thanks, Shane
1911su16b870 Offline
#19 Posted : Wednesday, August 19, 2009 2:29:50 PM(UTC)
1911su16b870

Rank: Uber Member

Joined: 8/18/2009(UTC)
Posts: 146

Thank you Shane for posting your FCU and Holster pictures. You have mad photo skills!
Hawk Offline
#20 Posted : Tuesday, August 25, 2009 9:25:08 AM(UTC)
Hawk

Rank: Administration

Joined: 8/26/2008(UTC)
Posts: 706
Location: Buford, GA

Was thanked: 90 time(s) in 38 post(s)
Now a sticky.
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THE Sig P250 Owner's Forum
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