 rmcelwee 
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Joined: Apr 2012  SC, USA
 Posts: 2 Feedback: 0% (0) |
Posted: 5/20/2012 5:55:10 PM
[Last Edit: 5/20/2012 5:58:41 PM by rmcelwee]
THE IMAGE ABOVE IS A PAID ADVERTISEMENT Here is a video of what I found: [youtube] http://www.youtube.com/watch?v=_rjgck3vjWk&list=UUtPuWZNMoCNe6lmrnkA2Y3g&index=1&feature=plcp[/youtube] Before I get out the sandpaper I just wanted to ask for comments/suggestions. Thanks! OK, I have no idea how to post the video <G>... http://www.youtube.com/watch?feature=player_detailpage&v=_rjgck3vjWk [youtube]http://www.youtube.com/watch?feature=player_detailpage&v=_rjgck3vjWk[/youtube] [youtube]http://www.youtube.com/watch?v=_rjgck3vjWk&feature=g-upl[/youtube] [youtube]http://www.youtube.com/watch?v=_rjgck3vjWk&f[/youtube] [youtube]_rjgck3vjWk&f[/youtube] |
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Posted: 5/20/2012 7:39:59 PM
I don't have sound, so I'm not sure if you addressed this in the video, but it looks like the top edge of the receiver is bulged right where the charging handle starts sticking. It could be the angle or something though. Have you fired it at all?
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Posted: 5/20/2012 8:26:14 PM
Yes, it has been fired (about 40 rounds). It sticks in several places but I haven't noticed anything on the externals to indicate a problem.
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n3awalk3r
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Team Member
Joined: Aug 2008 TX, USA
Posts: 2638 Feedback: 100% (21) Link To This Post |
Posted: 5/20/2012 8:45:42 PM
I see what the previous poster says might be a bulge on the top of the lower receiver, but I wonder if that is an illusion due to the way the receiver bends out for the trunnion. OP take a straight edge and see if both sides of the top of the lower receiver is true and flat. Do you have a headspace gauge? I'd get a no go gauge and check the headspace as well.
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Posted: 5/21/2012 5:40:25 AM
Originally Posted By n3awalk3r:
I see what the previous poster says might be a bulge on the top of the lower receiver, but I wonder if that is an illusion due to the way the receiver bends out for the trunnion. OP take a straight edge and see if both sides of the top of the lower receiver is true and flat. Do you have a headspace gauge? I'd get a no go gauge and check the headspace as well. I'll put a straight edge on it today and see what it looks like. No gauges but I am assuming you are saying that the bolt is not sitting far enough forward. There is no problem (that I have seen) when I slide it manually so I am guessing the problem does not lie with a headspace issue and is purely a bolt position issue due to the sticking. |
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Posted: 5/21/2012 8:38:43 AM
First, when you test the movement of the bolt carrier on an AK, you have to pull the trigger and hold it down.
When the trigger is pulled and held the disconnector holds the hammer rather than the hook on the trigger. The disconnector holds the hammer lower and there is less interface between the hammer and the bottom of the carrier. Second, did you clean the rifle throughly, twice, before you shot it. If not, clean the rifle throughly and then shoot it before you do anything else. The Romanians slather preservative all over the rifles. If it's not cleaned off, it can cause the problems you describe. Third, is the rifle properly lubricated? |
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Posted: 5/21/2012 11:49:36 AM
Originally Posted By POLYTHENEPAM:
First, when you test the movement of the bolt carrier on an AK, you have to pull the trigger and hold it down. When the trigger is pulled and held the disconnector holds the hammer rather than the hook on the trigger. The disconnector holds the hammer lower and there is less interface between the hammer and the bottom of the carrier. Second, did you clean the rifle throughly, twice, before you shot it. If not, clean the rifle throughly and then shoot it before you do anything else. The Romanians slather preservative all over the rifles. If it's not cleaned off, it can cause the problems you describe. Third, is the rifle properly lubricated? 1) I did not hold the trigger down but I see where that would help in places. 2) Yes, I cleaned it. I did not see any cosmoline on it though. 3) Yes, I used spray remoil w/teflon. It is a rough metal on metal stickiness that I am feeling. |
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Posted: 5/21/2012 1:47:37 PM
Originally Posted By rmcelwee:
1) I did not hold the trigger down but I see where that would help in places. 2) Yes, I cleaned it. I did not see any cosmoline on it though. 3) Yes, I used spray remoil w/teflon. It is a rough metal on metal stickiness that I am feeling. With the rifle empty, remove the operating spring, pull and hold the trigger, cock the hammer. Next slowly draw the carrier back almost to the rear. Note where the location of the operating handle where you feel resistance, binding or roughness. Slowly push the carrier forward. Note the position of the handle when you feel resistance, binding or roughness. Remove the carrier and hold it next to the receiver in the location(s) where there was resistance, etc. Check the receiver rails (upper and lower) for deformation, metal wear or finish wear in those area(s). If you don't find a problem area that way check the piston, the inside of the tube and the gas block for signs that the piston is rubbing on the tube and/or block. |
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Posted: 5/22/2012 4:35:23 AM
It looks like the piston is rubbing. I'm not sure if I can sand that down or just return the rifle. If I return it then I will pay shipping, a 3% fee for credit card return, etc. I'd rather fix the thing but I do not know if it would be successful. I'll probably give the vendor a call today and see what they say.
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Posted: 5/22/2012 7:31:33 AM
Originally Posted By rmcelwee:
It looks like the piston is rubbing. I'm not sure if I can sand that down or just return the rifle. If I return it then I will pay shipping, a 3% fee for credit card return, etc. I'd rather fix the thing but I do not know if it would be successful. I'll probably give the vendor a call today and see what they say. Removing metal from the piston probably won't work If the piston is the problem, the proper way to fix it is to drill out the weld that Century used to secure it, install it properly (it's supposed to have some play in it) and use a rivet to secure it. |
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n3awalk3r
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Joined: Aug 2008 TX, USA
Posts: 2643 Feedback: 100% (21) Link To This Post |
Posted: 5/22/2012 8:24:35 AM
Is the gas block straight on the barrel so that the gas tube is parallel with the barrel?
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Posted: 5/22/2012 12:50:52 PM
[Last Edit: 5/22/2012 7:44:01 PM by Miller2]
Originally Posted By n3awalk3r:
Is the gas block straight on the barrel so that the gas tube is parallel with the barrel? +1. I had a nearly identical problem that turned out to be an aftermarket rail putting pressure on the gas tube. Edit: I didn't read you clearly, you said "gas block" not "gas tube." My bad |
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