AK Sponsor
Posted: 2/10/2004 9:18:28 PM EDT
|
I have one of the Yugo SKS rifles. It was extremely gummy when I got it. The gas shut off was frozen in the launch position. I cleaned the thing up and unfroze the the shut off. The problem is that it fires, but doesn't eject the empties. I've had friends watch it and they say that the bolt moves maybe 1/4" is all. I have to assume that there is a gas leak in the system some where. Any ideas? Rudy out. |
|
Hey! Since you stated that you cleaned it up then the gas piston and piston extension are moving freely. Check the gas valve for any serious pitting or gas cuts. Do the same for the gas block itself. Make sure that the gas valve is locking in the "fire" position and you can't move the gas valve button to the left without depressing it fully first (from normal fire to grenade). Next time you go to the range you can wrap some masking (paper) tape around the seam where the gas tube meets the gas block and fire a round. If it blows a hole in the tape then you have a gas leak. The gas valves are inexpensive and can usually be found at SARCO or NUMRICH gun parts. If its the gas block then thats a little more involved. If you have an inspection period on the rifle from the dealer you can probably return it as defective and receive another. Good Luck |
| I was wondering about a gas leak there. I'll try the tape trick. I'm afraid that I waited too long to inspect it. I actually sold it to a friend at work. I bought it back from him and by then 2 weeks had past. I was wondering if the gas piston could be too loose in the cylinder? The smaller piston is squeeky clean and lightly oiled. That spring is one tough spring though! |
|
Yep! Could also be the gas piston. I have a "unissued" Yugo SKS. I will mic out the piston head OD and the gas tube ID and post it later. What was the condition of the rifle when you bought it (good, vgood, excellent)? You can also check to make sure the recoil spring is installed correctly (not being a smart ass, it does happen). The bent portion of the spring (slightly twisted) should go into the rear of the bolt carrier. The OD on the gas piston head on mine was .501 The ID in the gas tube was .502 So there is around .001 play between them. Unfortunately there will probably be some differences in uniformity based not only on the original manufacturing process but also due to wear of that particular rifles parts. The question is what is too much play? I don't have any source to find out what the original specs for these parts were. I would guess that anything over .005 play between these parts might cause problems. Maybe someone else might have more specifics concerning this problem. I'd hate to see you buy parts for nothing! |
AK Sponsor