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help my mechbox needs some love... lol seriously i need help...

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Old March 31st, 2008, 01:34   #1
FiveFingers
 
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help my mechbox needs some love... lol seriously i need help...

so here i got my aftermath mp5j... clone of the cyma mp5j which is a clone of the tm mp5j lol...
ok so my problem was after an op my trigger was jammed and felt like my safty wasn't disembarking. so when i got home i did some research and the selector switch on most mp5's give problems but when i took my mechbox out just to examine the selector plate i didn't see anything wrong with it. so it had to be internal... so i opened up the mechbox to find a small piece of something jamming the trigger... once i got everything back in place i put it all back together and now it only shoots in fullauto mode weather it's on semi or full...
does anyone have anytips on how to fix this oh yeah and onemore thing the last time i hooked up my battery it just started to fire without me even pulling the trigger so i pulled the battery off right and it started to heat up in my hand (not plugged in) so now i'm waiting on a new battery...


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Old March 31st, 2008, 01:39   #2
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If it's only firing in auto, look up information regarding the cut-off lever. It's what permits your gun to fire in semi.

If your gun is firing without you pulling the trigger, you've probably reassembled the trigger mechs incorrectly.
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Old March 31st, 2008, 01:50   #3
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is it ok or possible to test the gun with 9v batteries (the small rectangle ones) cos for some reason my mini type no longer wors from the last time i plugged it onto my gun...
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Old March 31st, 2008, 01:52   #4
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You might have killed your battery, I suggest holding off any other battery tests for now. Did that gun have a fuse? It doesn't look like it.
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Old March 31st, 2008, 02:42   #5
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you probably blew your fuse, i did that a few times, post a picture of the piece you took out, it might be essential

oh, and all guns have a fuse somewhere, check in the fore grip, it will probably be in there
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Old March 31st, 2008, 07:37   #6
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yeah there is a fuse but when i pulled the battery off i then checken the fuse and looks like it.s not blown... but i will change before i get my new battery just in case... i'm going to open up the mechbox and take some pics in a couple of days thanks for the help for now but hopefully the pics would help to help me out even more...
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Old March 31st, 2008, 08:59   #7
Danny Cyanide
 
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post a close up pic of the selector plate. If you lost the little spring that pushes on the cut off lever, your gun will lose its semi function.

Also, if you lost the little spring on the switch, the switch will not spring back open, causing the gun to fire when the trigger is not pulled.

2 things to check at least.
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Old March 31st, 2008, 16:51   #8
Omi-san
 
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Check the tamiya connectors on the battery and mechbox wires. Maybe one of the wire isn't properly inserted in the connector.
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Old March 31st, 2008, 17:27   #9
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if your battery heats up when unplugged, it probably has a short circuit somewhere.do not charge it unless you find the problem.
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Old March 31st, 2008, 20:16   #10
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ok so here are some close ups of the internals... the third pic points to something i think is broken can someone tell me what it is... close up on the 4th pic... oh and the selector plate looks normal




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Old March 31st, 2008, 20:20   #11
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That appears to be the latch that locks the trigger assy in after cycling once. You'll likely need another one from another box of the same version. That would be your full auto all the time problem right there. I'm not 100% on this but second opinion to confirm? thanks
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Old March 31st, 2008, 20:28   #12
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Not that I'm an expert, but I concur with what Azriel said.
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Old March 31st, 2008, 20:43   #13
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yea, that cut-off lever looks broken, its cheep to replace though, and make sure that theres no grease anywhere near any of the electrical connections.

Last edited by Caped_crusadar; March 31st, 2008 at 20:46..
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Old March 31st, 2008, 20:58   #14
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cool guys thanks fer all the help i.ll try to replace it asap... but for now i'm gonna see about getting a better gearbox... but sofar cost is holding me back... so i might just have to fix my sheit...
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Old March 31st, 2008, 21:40   #15
m102404
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Not a bad guess, eh?

Jugglez (airsoftparts.ca) is out of ver2 cutoff levers, and I just used my last one to fix a guy's JG 416.

You could ask CDN_Stalker if he's got an extra.

Kind of lousy that you have to hunt so hard for a $10 part...Jugglez usually has them.

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