JG G36 V3 Problem!!!

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MightyZagorec

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Hello everyone, first forgive me for my bad English
I bought JG G36 and a breakdown had just happened.
The spring is always stuck in the cylinder at the moment when it should crack,
I've been relasing antireversal latch   many times but this is still happening.

I opened it and everything was ok, plenty of lubricant, cylinder great,
Do you have any advice what to do?
Maybe motor is high or low?

 
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is the motor jamming at this point or does the motor spin but the piston stay locked back?

i've had problems in the past with an fps downgrade where a slightly larger diameter spring has caused issues with the piston locking back leaving the motor to spin freely.

 
Spring lock and motor lock,they both lock,when i press trigger motor is like he want to sping but something blocks him

 
Dose it happen in both Semi and Full Auto ? also what battery are you using and are you sure it is ok and fully charged ? - i presume you have had it working ok since you purchased it ?

 
How is the shimming?  is there a little free play in each gear when the gearbox is screwed together?

For what it's worth, my JG G36C has also locked up once when firing on semi, with a fully charged 7.4V lipo battery.  The motor has always sounded like it's struggling a little.  I suspect that it may simply not be powerful enough, although I'm minded to replace the wiring and throw in a basic MOSFET before replacing the motor.

 
When is in auto then dont lock so often but it lock sometimes, but in semi lock every shot, i will order new piston and try to adjust motor height, if that is not enough then i am done with airsoft... btw when i get new one (from gunfire. pl) i unpack gun and i try to shot, it shoot 3 times and lock, my fuse burned soo now i dont even have one, i shot without it...i had garantie 12 months, but i need to pay shipment 30€. 

 
Wait. Firstly, take a photo of the gear box and post it here. Let us know what you have changed.  Maybe a video of the noise and the problem?

I suspect it’s something as simple as the gears and piston are not lined up properly, or there could be some damage, but it is impossible to say without a picture.

 
Pay the shipping, Send it back.

Tell them the gearbox is locking up. And failing to fully cycle. It has blown the fuse as well, You replaced the fuse and it blew it again. So you have sent it with the original blown fuse installed.

If it's faulty GF.pl will credit your account with the shipping costs. And offer either a repair/replace or exchange.

https://gunfire.com/en/about/returns-and-complaints-832.html

 

1. After signing in or registering, click PLACE A COMPLAINT. Alternatively, you may go straight to http://gunfire.pl/rma/. You will be redirected to a RMA form which will allow you to generate your complaint. Generate a complaint document using the RMA system.
2. Put the product into its original packaging (if you still have it) and include a purchase document (invoice/receipt).
3. Place the RMA number onto the outside of the package (in several places best). The RMA number will be given by the system upon filling the RMA form.
4. Type address on the package and let us know via phone or e-mail that package is ready and you would like to have courier return service or that you are going to send the package on your own (after that send us receipt for the shipping so we could refund your costs - to the max. value of our shipping service?

GFCorp, Serwis Glowny
Jana Długosza 42-46
51-162 Wrocław
(POLAND)
Click to expand...
Click to shrink...

 
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That just shows the gearbox is locking up. 

You have two choices now. Either send it back like @Iceni has said, or you take the matter into your own hands and fix it yourself. 

If your going to fix it yourself,  take a photo of inside the gearbox. Try to get a good high def pic and we shall try to help you.

 
I can't be sure but a quick look at the video at 0:24 i looks like the sector gear bush is worn i can see what looks like a gap ? so as Prisce said might be your gears not aligned 

Also are they plastic Bushes ? 

 
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Is it the new(ish) version where you can adjust the fps with a screw in the spring guide? Maybe that's screwed in too much. I never had one in my hands so it's just a guess.

 
If you put both halves back together, and press the Air Nozzle, what happens? 

How many teeth on your piston?

 
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Yes it has spring guide(fps change) 

First spring, i think 15 teths. 

I think i solved problem... there was a bunch of bushings, so i take away some, on every gear just 2,i try again and now gun never lock, watafaq... is that posible? 

btw, if i press air nozle its going in like im firing 

 
Over-shimmed sector gear.

That black mark on the gear, and the scrub marks on the outside of the tappet plate tell me you had too  many shims on the underside of the sector gear. That would cause gearbox lockups.

Removing shims is the easy fix. It wants shimming correctly from pinion to sector.

It's a fairly common fault on v3 gearboxes that have been badly shimmed, Easy to fix. It certainly didn't come from the factory over-shimmed. JG generally don't put enough in at the factory to save costs!

Those shims look like cheap washers to me... Did you order shims or just find washers that fit the shafts? With that level of over-shimming  you are lucky you haven't cracked one of the gearbox shells.

I'm also not convinced the root cause has been found, If it was locking before you opened it and over-shimmed it there is still that problem waiting for you.

View attachment 39224

 
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