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  #1  
Old 03-07-2020, 10:40 AM
CLASSIC12 CLASSIC12 is offline
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Stuck gas tube

I am swapping uppers on two of my rifles, and one has the gas tube completely stuck.

Then I thought, ok, didnít want to go there but Iíll remove the front sight base so I can easily pull the tube off.

One of the two FSB taper pin is also completely stuck, Iím going nuts.

I tapped the gas tube forward very lightly and very little (there is very little forward room anyway) in order to unstick it. It did move forward but wonít move backwards.

I Kroiled the hell out of it too, but so far no luck. Same with the stuck taper pin. Short of a press for the taper pin (which I donít have and shops are not open today), any other ideas how to proceed ? Before I cut the damn tube and order another one.

TIA

Last edited by CLASSIC12; 03-07-2020 at 10:44 AM.
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  #2  
Old 03-07-2020, 11:08 AM
Striker2237 Striker2237 is offline
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Time for heat and a punch backed by a 4 b brass hammer
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  #3  
Old 03-07-2020, 11:14 AM
CLASSIC12 CLASSIC12 is offline
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Quote:
Originally Posted by Striker2237 View Post
Time for heat and a punch backed by a 4 b brass hammer

One of my punch started bending
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  #4  
Old 03-07-2020, 12:36 PM
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Imissedagain Imissedagain is offline
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Once saved a Swiss sailor 5K because the wheel at the helm could not be removed to install an autopilot.
He said to just cut it off.
When I told him what was involved he asked for options.
PB Blaster twice a day for six days and the bolts came loose with an impact hammer.

He gave me a box of Cohibas.
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  #5  
Old 03-07-2020, 12:50 PM
Striker2237 Striker2237 is offline
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Quote:
Originally Posted by CLASSIC12 View Post
Quote:
Originally Posted by Striker2237 View Post
Time for heat and a punch backed by a 4 b brass hammer

One of my punch started bending
Okay.....well that's a problem. Do you have easy access to a hardened one? If you have a bench vise you can also simulate a press if you have tool sockets on hand and some shims
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  #6  
Old 03-07-2020, 02:20 PM
CLASSIC12 CLASSIC12 is offline
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Quote:
Originally Posted by Imissedagain View Post
Once saved a Swiss sailor 5K because the wheel at the helm could not be removed to install an autopilot.

He said to just cut it off.

When I told him what was involved he asked for options.

PB Blaster twice a day for six days and the bolts came loose with an impact hammer.



He gave me a box of Cohibas.


Thatís a cool gift
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  #7  
Old 03-07-2020, 02:21 PM
CLASSIC12 CLASSIC12 is offline
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Quote:
Originally Posted by Striker2237 View Post
Okay.....well that's a problem. Do you have easy access to a hardened one? If you have a bench vise you can also simulate a press if you have tool sockets on hand and some shims


I didnít think of using the bench vise as a press, great idea
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  #8  
Old 03-07-2020, 02:21 PM
CLASSIC12 CLASSIC12 is offline
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Ok thanks all again. Victory is mine, it finally came out without damage with locking pliers and thick suede leather which offer grip and protection.

Hate it when the 30 minutes job turns into 3 hours with minor burns, scratches and cuts.
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Old 03-07-2020, 06:07 PM
Striker2237 Striker2237 is offline
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Quote:
Originally Posted by CLASSIC12 View Post
Ok thanks all again. Victory is mine, it finally came out without damage with locking pliers and thick suede leather which offer grip and protection.

Hate it when the 30 minutes job turns into 3 hours with minor burns, scratches and cuts.
Excellent! I'm glad you got it man, I too hate it when something simple breaks and turns and easy job into a ordeal.
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  #10  
Old 03-07-2020, 07:34 PM
1saxman 1saxman is offline
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I don't understand why you had to remove the gas tube to exchange uppers. Putting that aside, was the tube stuck in the gas block?
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  #11  
Old 03-08-2020, 01:09 AM
CLASSIC12 CLASSIC12 is offline
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Quote:
Originally Posted by 1saxman View Post
I don't understand why you had to remove the gas tube to exchange uppers. Putting that aside, was the tube stuck in the gas block?

I swapped uppers only, not barrels, so the barrels had to be removed.

I am not sure if tube was stuck in the gas block or the upper
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  #12  
Old 03-08-2020, 06:28 PM
megafiddle megafiddle is offline
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A little late, but something that works well:

Turn the upper upside down and clamp the gas tube in a vise, with the zagged portion within the vise jaws. Tighten the vise just enough to support the upper, and prevent the gas tube from rotating. The zags make it virtually impossible for the gas tube to rotate.

Then rotate the upper side to side very slightly, while working it forward off of the gas tube. You are rotating the sight base about the gas tube, rather than rotating the gas tube within the sight base.

Be prepared to hold the front end of the gas tube and sight base together as the tube exits. Once it's free, start the gas tube back into the sight base slightly, to keep the upper from dropping under its weight and angling the gas tube where it enters the port in the upper receiver. Then remove from the vise.

Smooth vise jaws are best to prevent marring the gas tube, and should not be soft.

Alternately, the zagged portion can be clamped between two flat plates using vise-grips. The gas tube itself is then rotated slightly back and forth and worked out of the sight base.

-

Last edited by megafiddle; 03-08-2020 at 08:03 PM.
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  #13  
Old 03-09-2020, 06:17 AM
CLASSIC12 CLASSIC12 is offline
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Quote:
Originally Posted by megafiddle View Post
A little late, but something that works well:



Turn the upper upside down and clamp the gas tube in a vise, with the zagged portion within the vise jaws. Tighten the vise just enough to support the upper, and prevent the gas tube from rotating. The zags make it virtually impossible for the gas tube to rotate.



Then rotate the upper side to side very slightly, while working it forward off of the gas tube. You are rotating the sight base about the gas tube, rather than rotating the gas tube within the sight base.



Be prepared to hold the front end of the gas tube and sight base together as the tube exits. Once it's free, start the gas tube back into the sight base slightly, to keep the upper from dropping under its weight and angling the gas tube where it enters the port in the upper receiver. Then remove from the vise.



Smooth vise jaws are best to prevent marring the gas tube, and should not be soft.



Alternately, the zagged portion can be clamped between two flat plates using vise-grips. The gas tube itself is then rotated slightly back and forth and worked out of the sight base.



-


Thanks for your input
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  #14  
Old 03-13-2020, 01:49 AM
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Imissedagain Imissedagain is offline
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In addition to Striker's reminder of a vise's possibilities, vise grips and pliers can be modified.
Pic from old pistolsmith book... Bob Day's shop.

I modified a staking tool to accomplish another task.

Using a big drill press as an arbor press and not a mill can work.
How high can a drill press jump? Woke me up!!!

http://sergeantviolin.com/1911-tools.html
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Last edited by Imissedagain; 03-13-2020 at 06:20 AM.
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  #15  
Old 03-14-2020, 01:02 PM
1saxman 1saxman is offline
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Quote:
Originally Posted by CLASSIC12 View Post
I swapped uppers only, not barrels, so the barrels had to be removed.

I am not sure if tube was stuck in the gas block or the upper
I was afraid that's what you were up to. A fun exercise if you have all the needed tools/fixtures but something that is not generally done.
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