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-   -   The "joys" (aka. trials) of being a gun doctor! (https://airsoftcanada.com/showthread.php?t=23099)

ccyg8774 March 11th, 2013 00:35

Quote:

Originally Posted by ScooterVauto (Post 1768616)
ok this is a new one to me..
we have all seen various axle damage, but how about this
aperantly it was dry fired ALOT, but that much damage??
Discuss.

Hi... Can I get your premission to post these 6 pictures on a Chinese forum as a example of "that's why you should always be careful and always check for proper shimming"? Thanks!

ScooterVauto March 11th, 2013 02:09

Quote:

Originally Posted by ccyg8774 (Post 1770995)
Hi... Can I get your premission to post these 6 pictures on a Chinese forum as a example of "that's why you should always be careful and always check for proper shimming"? Thanks!

yes that will be fine.

ccyg8774 March 11th, 2013 15:20

Quote:

Originally Posted by ScooterVauto (Post 1771016)
yes that will be fine.

Thanks a lot. :D

lurkingknight March 18th, 2013 23:49

some test firing of my g36 before game season starts... and this happened.



http://dreamers-ink.ca/airsoft/boom.jpg

http://dreamers-ink.ca/airsoft/grind.jpg

fired about 500 rounds full speed in all... probably another 1000 rounds at half speed.

CA 7mm bearings. Will be ordering up some bushings now. :D

and maybe a new set of gears. The SHS 13:1s are still in good shape... the spur on the fat side is a bit polished for obvious reasons... it ate away at the gearbox more than the gear. Some grinding occurred at the extreme sides of the teeth... so my spur and sector are a fraction more helical than straight cut now. :D

I didn't even lay into the trigger when it went... just pulled it sounded like the motor height came undone... I pulled once more to verify, no more cycle. And that was that. Pretty obvious what happened once the gearbox came out. :D

e-luder July 13th, 2013 00:53

So I know this is mostly dedicated to an AEG gun doc but....

I was sent an M4 to look after. Took it apart.

....and look at what I found!!!

http://i1255.photobucket.com/albums/...s59629739.jpeg

This was a build up of "lube gunk". The owner complained that it no longer fired and would vent gas on the first pull of the trigger.

I surmise that because of the cold gas venting from the magazine, it completely froze the gunk up and made it super hard.....

This is what happens when you don't take care of business like you should, fellahs.

The gunk was soooooo thick and hard that it didn't return the bolt all the way such that the loading muzzle and gas route packing on the magazine didn't line up. Ergo, all the vented gas.

http://i1255.photobucket.com/albums/...s736ec811.jpeg

Look at how thick the fucker is!!!
That's one helluva lot of lube....
I had to mildly heat the muzzle up just to get it off because it was soooo compacted in there good and tight that it refused to be scraped off.

Frack!!!!!

This is the side effects:

http://i1255.photobucket.com/albums/...s96bca2ce.jpeg

notice how much of the bolt was still sticking into the buffer tube. This prevented me from properly taking the upper and lower receiver apart. I had to undo the front pin and completely separate the two halves just to get the damn bolt out....

I don't know what the hell kind of lube this guy was using but...WTFBBQ!?

Also, why the hell would this be all over the loading muzzle anyways!???

Anyways, problem solved. Gimmie my $50 fee....
...or a carton of Belmonts. Large Kings.

MaybeStopCalling July 13th, 2013 01:47

I'm surprised a couple of strikes of the F/A wouldn't get it to seat forward enough to open up.

e-luder July 13th, 2013 03:06

Quote:

Originally Posted by MaybeStopCalling (Post 1815075)
I'm surprised a couple of strikes of the F/A wouldn't get it to seat forward enough to open up.

The gunk hardened so much. It felt like hard rubber after.
It was "packed" in there when the muzzle slams into the hop up chamber. I guess repetition made it so well packed that the bolt no longer returned to battery.

That was as far as the bolt went...

Styrak July 13th, 2013 11:44

Firing out of battery! Lol.

Styrak July 13th, 2013 11:45

Quote:

Originally Posted by lurkingknight (Post 1774256)
some test firing of my g36 before game season starts... and this happened.


fired about 500 rounds full speed in all... probably another 1000 rounds at half speed.

CA 7mm bearings. Will be ordering up some bushings now. :D

and maybe a new set of gears. The SHS 13:1s are still in good shape... the spur on the fat side is a bit polished for obvious reasons... it ate away at the gearbox more than the gear. Some grinding occurred at the extreme sides of the teeth... so my spur and sector are a fraction more helical than straight cut now. :D

I didn't even lay into the trigger when it went... just pulled it sounded like the motor height came undone... I pulled once more to verify, no more cycle. And that was that. Pretty obvious what happened once the gearbox came out. :D

And that's why you don't use bearings.

MaybeStopCalling July 13th, 2013 22:41

Quote:

Originally Posted by e-luder (Post 1815080)
The gunk hardened so much. It felt like hard rubber after.

http://cdn.theblemish.com/images/201...-troopers.jpeg

ccyg8774 July 14th, 2013 02:48

Quote:

Originally Posted by lurkingknight (Post 1774256)
some test firing of my g36 before game season starts... and this happened.

http://dreamers-ink.ca/airsoft/boom.jpg

http://dreamers-ink.ca/airsoft/grind.jpg

fired about 500 rounds full speed in all... probably another 1000 rounds at half speed.

CA 7mm bearings. Will be ordering up some bushings now. :D

I didn't even lay into the trigger when it went... just pulled it sounded like the motor height came undone... I pulled once more to verify, no more cycle. And that was that. Pretty obvious what happened once the gearbox came out. :D

I have a TM G36C that like to do the same thing till I changed to steel bushings...

ccyg8774 July 14th, 2013 02:49

Quote:

Originally Posted by e-luder (Post 1815080)
The gunk hardened so much. It felt like hard rubber after.
It was "packed" in there when the muzzle slams into the hop up chamber. I guess repetition made it so well packed that the bolt no longer returned to battery.

That was as far as the bolt went...

Would some solvent work?

e-luder July 14th, 2013 14:52

Quote:

Originally Posted by ccyg8774 (Post 1815267)
Would some solvent work?

Dunno, tbh. I didn't have any at the time.

Quote:

Originally Posted by styrak
Firing out of battery! Lol.

Yeah I know, I know.
I LOL'd too...at myself.

Styrak August 2nd, 2013 23:44

I was given a G&G SCAR-L and a long outer barrel to replace the stock short one.
Ok fine, that's a normal request.

Open up the gun and take the barrel out of packaging.....STAR type SCAR barrel.

Sigh.

HKGhost September 22nd, 2013 21:57

Yay, I got another gun that wasn't put together very well. Now I have to clean up the mess.

Cracked and missing piece from the switch assembly.
http://imageshack.us/a/img546/5242/oi1j.jpg

Two piece contacts sandwiched and tried soldering them together.
http://imageshack.us/a/img841/8713/7weg.jpg

Mismatched contacts that isn't even making contact.
http://imageshack.us/a/img17/298/1tr7.jpg

And the soldering job. OMG!!!
http://imageshack.us/a/img32/1521/mkjo.jpg
http://imageshack.us/a/img690/3944/ra4n.jpg
http://imageshack.us/a/img7/994/6b8w.jpg
http://imageshack.us/a/img20/5909/6w5i.jpg

The wiring was also shredded but I don't want to post all the issues with this gun. And to whoever did this job, I'm not bashing you, but please don't do this or anything that you don't know how to.


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