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Posted: 3/31/2006 6:06:45 AM EDT
[#1]
I tried the freezer / oven combo this week with a Romy G kit and the results were actually WORSE than just trying to push the two together by hand at room temp.
I ended up pressing it in with my 12-ton press. The tough part was getting the front trunion supported straight and even for a smooth push-in. Various sized steel blocks accomplished that. Psuhing the barrel pin back in was much tougher than the barrel. SNAP! POP! BANG! But eventually in it went. The barrel still looks *slightly* cockeyed to me but the pin is indexing it so it must be right. |
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Posted: 3/31/2006 12:25:27 PM EDT
[#2]
Not possible, you must have done something wrong that you didnt notice. How can shrinking the barrel diameter and enlarging the trunnion ID make it worse??
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Posted: 3/31/2006 12:56:55 PM EDT
[#3]
I used the threaded stock through the barrel and it worked perfect. Do a search or maybe someone can post a link. You cannot go wrong for a few dollars.
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Posted: 3/31/2006 2:17:04 PM EDT
[#4]
You have to warm the trunion (HOT) up with a propane or mapp torch and soak the barrel in freezing water. We did it last night and actually only let the barrel sit in cold water for about 5 minutes. It went in half way with nothing more than me pushing it in my hands.
thanks, Ron |
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Posted: 3/31/2006 3:56:52 PM EDT
[#5]
Ok guys same question but in reverse. I threw the barrel in the freezer and heated the trunion up to smoking hot with a torch... put it in a vice with pennies on the barrel and tried to knock it out with a 3lb hammer. Nothing, not even a little.
Tried a few more times, not even a mm of movement. No press over here so give me some inexpensive ideas. Threaded rod for pulling it in, but what about pulling it out?? BTW, knocking the barrel pin out was easy. 3lb hammer and no soaking required...just gave it three solid hits. Thanks |
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Posted: 3/31/2006 4:29:59 PM EDT
[#6]
Get yourself a pulley puller from an automotive shop for around $20. I also see that maasguns.com has them for $26. 
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Posted: 3/31/2006 4:35:14 PM EDT
[#7]
Ok, will do, thanks. Were you able to push the barrel out without any heating/cooling? Is it strong enough for that?
Thanks |
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Posted: 3/31/2006 5:32:00 PM EDT
[#8]
The gear puller method works great. Eventhough I've bought an xbec barrel kit, I find it much easier to drop in a couple pennies and turn the wrench. By far this is the simplest step to kit building (after that damn barrel pin is removed ofcourse).
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Posted: 3/31/2006 5:52:38 PM EDT
[#9]
I just used the dry ice/acetone method and it worked pretty well,
Publix sells dry ice for around $5 . break some into small chunks and put in with the acetone in a metal can put the barrel end in and let it sit. I tried heating the trunion but I think it will work better if you dont. I had it around 250 degrees and it heated up the barrel too fast. It went in about half an inch with no resistance at all but then heated up and had to press the rest of the way. I think just cooling the barrel will work better and the secret is to be FAST! I made a fixture to support the trunion in the large english bar clamp I have and it pushed it right in. I also made a kind of box with a large screw on one end and a U slot on the other the size of the barrel, just drop the trunion into it put some nickles and then a steel washer under the screw and push it out. the box is made from 3/8 flat bar. |
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Posted: 3/31/2006 7:17:03 PM EDT
[#10]
Thanks guys, I appreciate the info. Any pics? |
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Posted: 3/31/2006 8:10:55 PM EDT
[#11]
mykrowyre, The pulley puller works great. You should use a few pennies or nickles to protect the rear end of the barrel. Nope, you don't need to heat or cool anything. I use a cross type tire iron to turn it and put it into a vise to hold it steady. You should probably put some oil in the barrel pin hole before you use the pulley puller to prevent galling of the barrel but I gues you should do this with any method for pushing the barrel out. |
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Posted: 4/1/2006 9:25:57 AM EDT
[#12]
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Posted: 4/1/2006 8:43:05 PM EDT
[#13]
I did it. I found that exact puller at the autoparts store. Took me 15 seconds to get the barrel out.
Whooooohoooo! thanks! |
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Posted: 4/1/2006 11:16:19 PM EDT
[#14]
Glad it worked out for you. It's a pretty nifty little tool to have for building. |
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Posted: 4/2/2006 12:26:01 AM EDT
[#15]
I have removed about 20 barrels with the pulley puller. I did modify the "jaws" slightly by grinding away a little. It grabs onto the trunion a little easier and less chance of slipping. BTW, I use my air compressor and impact hammer and it takes all of a minute to push the barrels through. thanks, Ron |
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