M15A4 Stopped Shooting

nubC4K3S · January 6th, 2008, 21:17

Quote:

Originally Posted by nubC4K3S

When i opened it, you couldnt see the spring in the smaller opening towards the back of the gear box, only the plastic guide. I dont exactly know what that means as far as where the piston is at.

http://s262.photobucket.com/albums/i...t=IMG_2998.jpg
http://s262.photobucket.com/albums/i...t=IMG_2997.jpg

The first picture has a black piece with a little spring in it. This seems to be out of line, but it could just be compressed and that is what it is supposed to look like. Tell me if the links dont work.

nubC4K3S · January 6th, 2008, 21:24

Quote:

Originally Posted by nubC4K3S

http://s262.photobucket.com/albums/i...t=IMG_2998.jpg
http://s262.photobucket.com/albums/i...t=IMG_2997.jpg

The first picture has a black piece with a little spring in it. This seems to be out of line, but it could just be compressed and that is what it is supposed to look like. Tell me if the links dont work.

If what you're saying is true (which it seems that it has come time to face fact), then opening the gearbox would have no solution, and i couldn't unstick (lack of a better word) the piece?

Flatlander · January 6th, 2008, 21:27

That yellow thing in the back of the mechbox is your piston. Your mechbox is locked up - could be many different reasons! No way to tell until the mechbox is opened to see what's wrong. Be careful when openeing it because the piston/spring will want to decompress and can shoot parts everywhere.

I just opened up a mechbox yesterday for a guy and his piston was locked all the way back also like yours. Turns out his piston head exploded inside.

nubC4K3S · January 6th, 2008, 21:47

Quote:

Originally Posted by Flatlander

That yellow thing in the back of the mechbox is your piston. Your mechbox is locked up - could be many different reasons! No way to tell until the mechbox is opened to see what's wrong. Be careful when openeing it because the piston/spring will want to decompress and can shoot parts everywhere.

I just opened up a mechbox yesterday for a guy and his piston was locked all the way back also like yours. Turns out his piston head exploded inside.

Ok, i opened the mechbox and this is what i saw. I believe i have found my problem. Anybody know a solution or why that would happen?

http://s262.photobucket.com/albums/i...t=IMG_3004.jpg
http://s262.photobucket.com/albums/i...t=IMG_3008.jpg

KEVORKIAN · January 6th, 2008, 21:53

Any broken teeth on the gears? Hard to tell from the pics? Look closely...

nubC4K3S · January 6th, 2008, 21:56

Quote:

Originally Posted by KEVORKIAN

Any broken teeth on the gears? Hard to tell from the pics? Look closely...

Doesn't look that way to me. The anti-reversal latch was way out of place when I opened it though. This could be the problem or it could of been because of the spring going back into place when it opened. I spun the gears to look all the way around them, and it looked OK. Should i clean everything up while im in there, or just leave it? I am probably going to put her back together now and see if it works.

Styrak · January 6th, 2008, 22:18

Quote:

Originally Posted by nubC4K3S

Doesn't look that way to me. The anti-reversal latch was way out of place when I opened it though. This could be the problem or it could of been because of the spring going back into place when it opened. I spun the gears to look all the way around them, and it looked OK. Should i clean everything up while im in there, or just leave it? I am probably going to put her back together now and see if it works.

The anti reversal latch of my M4 pops out everytime I take the mechbox apart and is a bitch to hold in when I put it back together. Don't worry about that.

SEALs · January 6th, 2008, 23:13

Might just be a timing or shimming issue which causes the mechbox to lock or simply the battery once again that might have a dead cell of just dont have enought juice to run it properly ( happens oftenly with simptomes like yours) Even tought it work on your RC car, it doesnt mean its strong enought for the gun. Most RC works fine with 7.2v 600 mah bateries....

nubC4K3S · January 7th, 2008, 19:04

Quote:

Originally Posted by SEALs

Might just be a timing or shimming issue which causes the mechbox to lock or simply the battery once again that might have a dead cell of just dont have enought juice to run it properly ( happens oftenly with simptomes like yours) Even tought it work on your RC car, it doesnt mean its strong enought for the gun. Most RC works fine with 7.2v 600 mah bateries....

Whats the stock shimming configuration for the m16a4? just 1 on top and 1 on bottom of each gear or different every gear?

nubC4K3S · January 7th, 2008, 19:30

eeeew.... i took a look at the cylinder because i shot the gun with the gear box exposed and saw the piston move back and jam in there when i shot. Then i see that my cylinder head has no o-ring or anything on it, and i can put it all the way through the cylinder. Is this normal?

nubC4K3S · January 7th, 2008, 19:32

Scratch that, the bottom of the cylinder head with the o-ring ( which is very, very loose) got stuck and jammed on the back of the piston. I think im on my way to a solution. Any suggestions on a fix?

nubC4K3S · January 7th, 2008, 20:22

http://s262.photobucket.com/albums/i...t=IMG_3026.jpg
http://s262.photobucket.com/albums/i...t=IMG_3025.jpg
http://s262.photobucket.com/albums/i...t=IMG_3027.jpg

These are the pictures of the cylinder head and the piston. Kinda messed up... lol.

CDN_Stalker · January 7th, 2008, 20:49

Hit up the guys on airsoft retreat, best to find someone there that's local to you. I'd say ship it here to me to fix for you, but it won't make it across the border (will get seized and most likely destroyed).

If you ask around on ASR, maybe mention Canadian_Stalker suggested you do so, I mostly frequent the Sniper's Perch there and many seem to respect my opinion.

BTW, that black platic peice on the side of your mechbox with the spring is your selector plate, it has nothing to do (really) with your piston jamming back like that. BTW, how did charging your battery work out?

nubC4K3S · January 7th, 2008, 21:10

Quote:

Originally Posted by CDN_Stalker

Hit up the guys on airsoft retreat, best to find someone there that's local to you. I'd say ship it here to me to fix for you, but it won't make it across the border (will get seized and most likely destroyed).

If you ask around on ASR, maybe mention Canadian_Stalker suggested you do so, I mostly frequent the Sniper's Perch there and many seem to respect my opinion.

BTW, that black platic peice on the side of your mechbox with the spring is your selector plate, it has nothing to do (really) with your piston jamming back like that. BTW, how did charging your battery work out?

Yea, thanks. I realized that was the selector plate when i was opening it and looking at guides. Should i look into getting a new piston and cylinder head among other things, or just those two? Im going to go post in ASR too, thanks for looking.

nubC4K3S · January 7th, 2008, 21:20

What brand and model of upgrades (replacements) should i get?

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January 6th, 2008, 21:53	#20
KEVORKIAN Trader rating Join Date: Nov 2006 Location: Manitoba	Any broken teeth on the gears? Hard to tell from the pics? Look closely... __________________ Kevorkian I SUPPORT THE USE OF SILICA BB BASTARDS!

January 6th, 2008, 23:13	#23
SEALs Trader rating Join Date: Dec 2001 Location: Watchin' your 6.	Might just be a timing or shimming issue which causes the mechbox to lock or simply the battery once again that might have a dead cell of just dont have enought juice to run it properly ( happens oftenly with simptomes like yours) Even tought it work on your RC car, it doesnt mean its strong enought for the gun. Most RC works fine with 7.2v 600 mah bateries.... __________________ If you're short of everything except enemies, you're in combat. D.O.W. SEALs Father of fear, reckless and widowmaker

January 7th, 2008, 20:49	#28
CDN_Stalker Official ASC Bladesmith Trader rating Join Date: Jul 2003 Location: Ottawa, Ont.	Hit up the guys on airsoft retreat, best to find someone there that's local to you. I'd say ship it here to me to fix for you, but it won't make it across the border (will get seized and most likely destroyed). If you ask around on ASR, maybe mention Canadian_Stalker suggested you do so, I mostly frequent the Sniper's Perch there and many seem to respect my opinion. BTW, that black platic peice on the side of your mechbox with the spring is your selector plate, it has nothing to do (really) with your piston jamming back like that. BTW, how did charging your battery work out? __________________ STKR Knives http://www.facebook.com/#!/pages/STK...17036668380871

January 6th, 2008, 21:27	#18
Flatlander Trader rating Join Date: Mar 2007 Location: Edmonton	That yellow thing in the back of the mechbox is your piston. Your mechbox is locked up - could be many different reasons! No way to tell until the mechbox is opened to see what's wrong. Be careful when openeing it because the piston/spring will want to decompress and can shoot parts everywhere. I just opened up a mechbox yesterday for a guy and his piston was locked all the way back also like yours. Turns out his piston head exploded inside.

January 7th, 2008, 19:30	#25
nubC4K3S Trader rating Join Date: Dec 2007 Location: New Jersey, USA	eeeew.... i took a look at the cylinder because i shot the gun with the gear box exposed and saw the piston move back and jam in there when i shot. Then i see that my cylinder head has no o-ring or anything on it, and i can put it all the way through the cylinder. Is this normal?

January 7th, 2008, 19:32	#26
nubC4K3S Trader rating Join Date: Dec 2007 Location: New Jersey, USA	Scratch that, the bottom of the cylinder head with the o-ring ( which is very, very loose) got stuck and jammed on the back of the piston. I think im on my way to a solution. Any suggestions on a fix?

January 7th, 2008, 20:22	#27
nubC4K3S Trader rating Join Date: Dec 2007 Location: New Jersey, USA	http://s262.photobucket.com/albums/i...t=IMG_3026.jpg http://s262.photobucket.com/albums/i...t=IMG_3025.jpg http://s262.photobucket.com/albums/i...t=IMG_3027.jpg These are the pictures of the cylinder head and the piston. Kinda messed up... lol.

January 7th, 2008, 21:20	#30
nubC4K3S Trader rating Join Date: Dec 2007 Location: New Jersey, USA	What brand and model of upgrades (replacements) should i get?

M15A4 Stopped Shooting

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