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May 23rd, 2009, 19:20 | #1 |
Grinding Noise on CA Mechbox
'Lo. I recently ordered a used AEG off the classifieds, and I haven't gotten a chance to actually give a few rounds through it until now. Everything was working great at first, though I noticed in semi-automatic it was double feeding a bit. Interested in the rate of fire, I flick it over to automatic and start letting out a few bursts. The first two bursts or so seemed fine, then I got a very, very ugly grinding noise. Panic! I stopped firing and immediately came on here.
Here's the breakdown:
From doing a quick search of the forums it's suggested that this is either a problem with jamming, which I already did a quick search on, or motor height. If this is the case, do I simply adjust that by tightening the flat-head screw on the bottom of my grip? I'm willing to take the AEG apart and take a gander inside, but I'm not so confident as to not ask for some help first. Thanks in advance to anyone with advice. Last edited by Ashton; May 23rd, 2009 at 20:33.. |
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May 23rd, 2009, 20:09 | #2 |
Sounds like motor height needs to be ajusted. Yes tighten the screw on the bottom of my grip but not to much or it will jam and not move/run. Then put some thread lock on the screw so it wont happen agian.
Last edited by zone 69; May 23rd, 2009 at 20:15.. |
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May 23rd, 2009, 20:27 | #3 |
Tried going both up and down, but I'm only getting a squealing sound of varying pitch. The only other difference is that the grinding sound is gone and now it simply seems as though the motor is spinning up and not contacting anything, though I might be wrong. I'll continue to try to adjust it, but any tips or advice on how to do this properly beyond guessing would be great, or if this might be another problem. I didn't hear any snapping sounds when this first happened, but I'm obviously concerned that the teeth of a gear may have broken, or is that unlikely?
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May 23rd, 2009, 20:28 | #4 |
A Total Bastard
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Make sure your grip screws hold the grip plate tight.. I was just working on my buddies gun adjusting the motor because it was overly whiney, and I noticed the front grip screw was loose thus causing the plate to shift.. fixed that, everything tight, no more whine now and the gun shoots crisp again.
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W1-5 |
May 23rd, 2009, 20:33 | #5 |
Eugh, I just realized that I haven't even mentioned the fact that it hasn't been firing. It's not just a sound problem. I also took a gander in the feeder and saw a shot on semi-automatic, and the piston only moved very, very slightly. The sound gets very high pitched as I tighten the motor, and more grindy as I loosen it, yet nothing so far seems to "catch" and I certainly don't get the same sound I was getting before. But right now even with the adjustment screw far looser than it began, there's been no indication of improvement.
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May 23rd, 2009, 20:38 | #6 | |
Quote:
Sounds like you stripped something. If you're lucky, it's the piston. Only way to be sure is to open the mechbox.
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"The Bird of Hermes is My Name, Eating My Wings to Make Me Tame." |
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May 23rd, 2009, 20:42 | #7 |
It's broke.....
Sounds like your piston gear is stripped...or has caved in regardless...sounds like time to crack open the gearbox and have a look... good luck
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Semper Primus: Always First |
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May 23rd, 2009, 20:55 | #8 |
Alrighty. Thanks again. I'll try to get into the thing to take a look. Is this something that would have been caused by prior damage to the mechbox, or am I looking at a self-inflicted problem here? I'm somewhat irked considering this was listed in working condition and I got no more than sixty BBs through it, but at the same time the guy who did the sale seemed very respectable and the custom build was apparently done by wKnight. Don't want to bug the seller if this is entirely my own doing, but I'm not feeling too chipper about not even getting to field the gun before a breakage.
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May 23rd, 2009, 21:08 | #9 |
Very hard to tell. It's possible that the piston was worn down/damaged and already on the verge of failure, or something jammed while you were firing. Insufficient data, cannot compute.
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"The Bird of Hermes is My Name, Eating My Wings to Make Me Tame." |
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May 23rd, 2009, 22:01 | #10 |
The first thing I do after buying a used or cheap clone gun is to take it down to have a look for myself if it needs anything done to it. A little bit of proventive maintenance go,s a long way.
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May 23rd, 2009, 22:09 | #11 |
Being a newbie, preventative maintenance for me would usually be not touching the mechbox at all. Regardless, I've followed the MechBox.com guide to opening up a TM M733 up to the part about pushing out the retaining pin for the trigger. The retaining pin on this doesn't want to come out, and I certainly do not want to damage it. I think this might be caused by the paint job on the gun. Any advice on how I can open this further without creating more worries for myself?
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May 23rd, 2009, 22:11 | #12 |
As a safeguard, when buying a used gun try to get a gun doc to look at it first. I know this isn't very practical, but I sopose it could save you from a situation like this, assuming that the problem was present upon the sale of the gun. This is a lesson I learnt first hand, not trying to preach, I know exactly how you feel right now, and I know that it sucks. The only thing you can do is open her up, take a look inside and call it from there. If I were you I would look into finding a local gun doc, and have him open it. I opened my first gun myself, although I got lucky, I almost lost a few pieces and couldn't place them correctly. If you want to walk the path of doing it yourself, look up your gun on mechbox.com. They have some extremely useful videos on how to take apart and reassemble mechboxes.
Good Luck!! EDIT: Just saw your last post, disregard the mechbox.com stuff
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I knew a man once who said "Death smiles at us all. All a man can do is smile back." |
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May 23rd, 2009, 22:16 | #13 | |
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Edit: Before I run into more woes I'm going to drag this thing up to the South Island Rangers crew, as I'd rather not damage it further in a haphazard attempt to fix it. My primary problem is that the leads on the wire are soldered on to the motor and I have absolutely no equipment to detach or reattach them if I tamper further. I'll probably seek a gun doc in Vancouver if they can't assist me. Thanks all, again. Last edited by Ashton; May 23rd, 2009 at 22:32.. |
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May 23rd, 2009, 22:34 | #14 | |
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Last edited by zone 69; May 23rd, 2009 at 22:37.. |
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