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Old March 9th, 2011, 00:20   #14
Cokeman
a.k.a. az29okg
 
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Join Date: Jan 2011
Location: Ontario
Quote:
Originally Posted by Lumi View Post
Look at the pictures attached, I've circled the selector lever end in red. After using the forward assist and before firing the gun crack it open and look at this lever end, with the gun open and the battery out put the gun to Semi and squeeze the trigger, does the white plastic piece go over or under the metal tab on the selector lever? It may be that the gears are pushing on this after they reverse and lifting it just enough to be switching it to full auto for the first shot.
How it might look
How it should look

I'm still trying to figure out how to correct this if that is the problem, but if it is we've at least got it narrowed down.
Quote:
Originally Posted by Cokeman View Post
When I pull the trigger, in semi mode, the plastic piece goes over the metal piece.

However, I think my problem doesn't have anything to do with the forward assist know. Today, when I am in semi-auto mode, it will fire on full auto about 75% of the time.

With Lumi's pictures and description, I believe that I've isolated my problem (in semi-auto mode, gun would fire full auto 75% of the time) and a identified a solution (in the process, I disassembled the lower gearbox and was able to understand how it works). When in the semi-auto fire mode, the cut-off lever is in the lower position, so that when you pull the trigger, there is a plastic piece on the switch assemble that moves forward, on top of the front tab of the cut-off lever (as shown in Lumi's picture, I've attached a copy of the picture below, so that it will always be available). With the cut-off lever held down, the gears will only spin once to fire a single shot. However, I noticed that on my gun, the metal contacts in the switch assemble would establish a contact before the plastic piece went overtop the cut-off lever. As the gears spin around, the cut-off lever would get flipped upwards with each rotation of the sector gear (the gear that you can see in the picture) and the gun ends up firing in full auto mode.

So, I fixed my problem by making sure that the fire mode selector was operating the cut-off lever correctly. Then I spread the contacts (in the switch assembly, the contacts are beneath the spring shown in the picture) so that it required a longer trigger pull. This gave the plastic piece enough time to get ontop of the cut-off lever, thereby enabling semi-auto firing.

What a relief!!!!! It really sucks paying so much money for a new AEG and then getting a major problem (and a few minor ones as well) and you are essentially on your own (with the great help from ASC members) to resolve it.

Thanks everybody. Much appreciate it.

However, I still have the original problem with the gun firing a full-auto burst (fire selector is on semi-auto) after depressing the forward assist knob. I guess it is related my problem/solution for why my gun was shooting full auto when in semi-auto mode. But I just can't figure it our right now.
Attached Images
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