kaponk
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A Bullet Sounds The Same In Every Language
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Post by kaponk on Jun 3, 2011 0:15:26 GMT -5
Hello all, i`m new to the thread and already have a question for you all. I recently purchased an A&K Mk43 Mod0 and worked fine, then out of no wheres stopped, the box mag grinded from where it wasnt shooting and i charged both batteries and nothing. I brought it in and didnt mess with it till the next morning. Rigged it all back up pulled the trigger and viola worked, but today it didnt again. Now both times i could pull the trigger but no firing, just one light thud from within the gear box, it just now stopped making noise all together and I seen the fuse had blown. Now could it have been the fuse slowly burning and not having much connection causing this, or was it not the fuse?
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fuzzywolly
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Vegetation is gold
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Post by fuzzywolly on Jun 3, 2011 8:57:46 GMT -5
The thud makes me think that it had something to do with the gun jamming. I had a friend who's AEG jammed big time and every time he pulled the trigger, all you hear is "thud" "thud". Have you tried checking for jams?
Perhaps you were using lower quality bbs?
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Post by Knief on Jun 3, 2011 10:01:32 GMT -5
Your fuse blowing is just a symptom of the larger problem. What you're most likely looking at is jammed gearbox, which is most likely caused by bad shimming. That thud you heard before the motor blew was the motor trying to turn the gearbox but not being able to. If your motor could turn your gearbox but suddenly can't, it almost always means that your gearbox has become bound up (assuming your battery isn't dead). And gearboxes only really bind up under two conditions. First, something like your piston or tappet plate broke and pieces of it are stuck in the gears. Second, bad shimming, and that's probably the cause about 90% of the time in all gun and 98% of the time in clones. Your A&K being the clone that it is, probably needs to be reshimmed.
So you'll need to replace that fuse first, then open the gearbox to unjam it and reshim it. If you're not comfortable with that, there are a number of shops in the state that do quality work for a reasonable price. Since the only "part" you need is a set of shims, you'll basically be paying for the labor, so that's not too bad.
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kaponk
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A Bullet Sounds The Same In Every Language
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Post by kaponk on Jun 3, 2011 11:16:01 GMT -5
Thanks both of you, and I don`t think it`s jamming, it`s just one thud, not continuous. Sad part is I just got this gun last Thursday and immediately had issues. Well thanks a bunch guys, I am going to replace the fuse and see then. Also one other thing, the first time it did this i could sway the gun around and it would fire every now and then. Well, good news, this gun is covered under a 14 day warranty, so if i must i`ll just have it sent back to be fixed.
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Post by Knief on Jun 3, 2011 12:21:27 GMT -5
You're right that it's not jamming bbs. But I promise you that the soft thud means that your gearbox is locked up (again, assuming you have a working battery).
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kaponk
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A Bullet Sounds The Same In Every Language
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Post by kaponk on Jun 3, 2011 13:29:44 GMT -5
It has to be the gear box locked up, I put the fuse in and just get that light thud, I already sent my warranty request and am waiting on the reply. I should be able to package it up and send it to them to get it fixed. Still disappointed that they didnt catch this issue before sending it to me. :/ $400 i expect the gun not to break till a little later.
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kaponk
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A Bullet Sounds The Same In Every Language
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Post by kaponk on Jun 3, 2011 13:41:24 GMT -5
Just called them, the sales representative agrees on the gear box being locked up, something the other 2 morons before had no clue on. Luckily I still have the warranty and will be sending it back for repairs.
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Post by Knief on Jun 3, 2011 14:32:40 GMT -5
They can't test every gun, and even if they could, this issue wouldn't necessarily show up in the first couple hundred rounds. Really, a broken gun is just the risk you run when you buy a clone gun. If you want a gun that works out of the box, you need something like a TM or a G&G. With A&K, Dboys, Echo1, any of those, you'll always be running a substantially higher risk of getting a lemon.
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Praetorian
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CNC Machinist- More G than the code I write.
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Post by Praetorian on Jun 6, 2011 16:51:37 GMT -5
And to push Knief's point further...
For the price of a cool Echo 1 M4 RIS Airsoft AEG Rifle w/ CNC Full Metal Rail and a high chance of it being and ingredient for Sprite, 195.00$, you could get a highly reliable G&G combat machine long-barrel full RIS with a 9.6v for 155.00$
That was just an example. But even if the G&G gun is a wee bit more cash, it is worth having even because of the Brand alone will resell for more than an E1.
P.S. Not meaning to bag on Echo1, but ALL the guns of Echo1 I have had were unreliable.
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kaponk
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A Bullet Sounds The Same In Every Language
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Post by kaponk on Jun 23, 2011 0:57:02 GMT -5
Got caught up in vacation and missed the warranty, but not worried, opened it up and took a look for myself. I agree i think a re-shimming and it will work fine, it has a total of two shims, one ontop of the spur gear and one ontop of the sector gear. I looked everything over, the gears are in great shape, piston teeth are fine so it has to be shims. Ill post pictures of the gears, gear box, and piston teeth.
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kaponk
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A Bullet Sounds The Same In Every Language
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Post by kaponk on Jun 23, 2011 0:59:57 GMT -5
Spur Gear Sector Gear Bottom of the Sector Gear Top of Gear Box Bottom of gear Box Piston teeth
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Post by Ghast on Jun 23, 2011 11:11:25 GMT -5
Excellent! Ok, now what you should do is shim it in such a way that when you put the thing back together they spin freely without very left and right play. Test this by putting the gears in without any of the other interals and spin them by hand.
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Post by Knief on Jun 23, 2011 11:26:48 GMT -5
When you test them as Ghast said, be sure to screw the two halves of the box together. You'll never be able to hold the box together as tightly with your hands as the screws will, and that amount could be the difference between a smoothly running box and stripped gears.
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kaponk
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A Bullet Sounds The Same In Every Language
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Post by kaponk on Jun 23, 2011 15:04:55 GMT -5
I`ve watched a few videos of how to shim, and i already noticed that my spur gear is hitting one of the bearings or some raised metal from the cast of the gear box, so it will have to be raised up. I think i`m going to order some G&P shims then go from there, I never would have thought little metal washers like these could cause a gun to stop firing. I`ll keep you guys updated, also found a post in another forum with same issue with an A&K M60, and the MK43 has same gear box, all he did was reshim and he said worked fine.
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kaponk
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A Bullet Sounds The Same In Every Language
Posts: 108
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Post by kaponk on Jul 7, 2011 18:04:40 GMT -5
I have yet to order the shims, but have been interested in upgrading the internals, i`ve done some looking around and one post only said to get a high torque motor and just run a lipo. Can the stock parts on my gun even handle a lipo, the guy on the post said all it would do would increase the rate of wear and tear, but i`ve heard of lipos doing some damage to gear boxes not properly set up to handle a lipo. Also would a better piston be a good idea, ive found a Matrix one with steel teeth and looking at piston heads now
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