JG G3. No power.

PRincess · Post by **PRincess** » Sat Mar 12, 2011 11:40 pm

Chippy wrote: Would those copper parts be the ones that interact with the trigger and selector assembly?

Yes they would be. After having an electrical charge passed across and through them for so many times they will get a build up from the transfer of electrons and what not. (I'm not a scientist.) This will lead to a reduction in current flow. Did you ever have slot cars as a kid? It is kind of the same priniciple as those, in where you have to keep the contacts clean for them to work at optimum performance.

Chippy · Post by **Chippy** » Sat Mar 12, 2011 11:52 pm

That might be the problem because I have had this gun for almost 3 years now. Infact, two weeks ago was the first time I opened it up since I got it. Today was the first time I opened the gearbox.

Post by **Dominum** » Sun Mar 13, 2011 5:19 pm

We are in the new shell now, right? switch the contacts on the motor to make sure the motor isn't wired backwards and just trying to turn against the anti reversal latch.

Chippy · Post by **Chippy** » Sun Mar 13, 2011 5:24 pm

actually, I put everything back into the original shell last night using a tutorial video since it wasnt broken.

Post by **Dominum** » Sun Mar 13, 2011 5:26 pm

Dominum wrote: Normally I would say that there are several things this could be, because there are. However, in this particular case I can reference two or three of the exact same gun that I have worked on where the metal piece that juts out from (and is part of) the left half of the gearbox shell which prevents the contact slide from going too far back had broken off completely. It is difficult to notice, but if you take it apart and reassemble it the gearbox will cycle one time and stop again. There are two fixes to this: Find the broken off piece of metal and glue it back (cons being the glue may get in the way of other things and it may break again, so it has to be done right); OR you can buy a new GB shell (cons being it is not as cheap and is very time consuming to replace everything). It may seem like a long shot, but I'll bet you $5 it is this rare flaw.

This means you can close it and it will attempt to cycle, and then no more power will be able to reach the motor. Like I said, my bet is the problem with the shell I originally stated, and using the old shell means it will not work.

Chippy · Post by **Chippy** » Sun Mar 13, 2011 5:28 pm

...oh...time to switch gearbox shells...

Post by **Dominum** » Sun Mar 13, 2011 5:29 pm

Post a clear pic of the empty left side of the original shell zoomed in on the area around the sector and trigger (but with all parts removed) and I will tell you for sure if my original diagnosis was correct, then we can move on from there.

Chippy · Post by **Chippy** » Sun Mar 13, 2011 5:33 pm

Ok. Just one thing before I do: is there any specific way to remove the trigger contacts and the parts that connect to the selector assembly? In my opinion, that was the hardest part.

Post by **Dominum** » Sun Mar 13, 2011 5:35 pm

Remove everything else first.

Chippy · Post by **Chippy** » Sun Mar 13, 2011 5:46 pm

Ok, I'll get to work on it. Is there any way to upload pics to the website through a phone?

Chippy · Post by **Chippy** » Sun Mar 13, 2011 7:51 pm

Just emptied out tue gearbox. I took a look at the copper parts and there was a build up of some black residue. About to post up the pictures of the left side.

Chippy · Post by **Chippy** » Sun Mar 13, 2011 8:15 pm

[img width=480 height=360]http://i1207.photobucket.com/albums/bb4 ... arbox1.jpg[/img]

[img width=1024 height=768]http://i1207.photobucket.com/albums/bb4 ... arbox3.jpg[/img]

[img width=1024 height=768]http://i1207.photobucket.com/albums/bb4 ... arbox2.jpg[/img]

Chippy · Post by **Chippy** » Sun Mar 13, 2011 10:18 pm

So I cleaned the copper parts, made sure everything was in place and put it back together for the night so I don't lose anything if I have to change gearbox shells tomorrow. I was feeling lucky so I fired it once on semi. It worked as if it was normal but then the no power problem occurred again. I asume i have to replace the gearbox?

Chippy · Post by **Chippy** » Sun Mar 13, 2011 10:34 pm

^I meant to say: "I asume I have to replace the gearbox *shell"

PRincess · Post by **PRincess** » Mon Mar 14, 2011 12:09 am

Have you lubed it at all?

Did the gearbox sound normal when you fired it on semi?

This quote sounds familiar to what you are experiencing.

Dominum wrote: ^The prior would result in a faint sound of the motor attempting to cycle, since there is no sound, at some point power is simply not reaching the motor.

Normally I would say that there are several things this could be, because there are. However, in this particular case I can reference two or three of the exact same gun that I have worked on where the metal piece that juts out from (and is part of) the left half of the gearbox shell which prevents the contact slide from going too far back had broken off completely. It is difficult to notice, but if you take it apart and reassemble it the gearbox will cycle one time and stop again. There are two fixes to this: Find the broken off piece of metal and glue it back (cons being the glue may get in the way of other things and it may break again, so it has to be done right); OR you can buy a new GB shell (cons being it is not as cheap and is very time consuming to replace everything). It may seem like a long shot, but I'll bet you $5 it is this rare flaw.

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