Jump to content

Help my new spring won't sit straight, in my G2 gearbox,


Joyfull69
This thread is over three months old. Please be sure that your post is appropriate as it will revive this otherwise old (and possibly forgotten) topic.

Recommended Posts

As you can see in the pictures, the spring will pop up or down, sadly I didn't realize this when I first put the gun back together, it only cronoed at around 150fps, the spring is meant to put out 350fps so I'm hoping this is the issue, as the gun was working fine before hand

IMG_20190714_195039.jpg

Link to comment
Share on other sites

What’s the gun? 

 

There a thread in the spring guide there, guessing ( like the stock) screws on to the back of the gun. If so, that screw will hold the spring guide straight. 

 

What im trying to say is it’s very unlikely that the spring actually looks like it does it the photo, once the gun is fully assembled 

Link to comment
Share on other sites

I'm a twat 😂😂 have just put the lower receiver back on and as you said it looks fine, I guess I'm just looking for issues now, as I thought that might be the reason the fps has dropped so rapidly since I put the new spring in, the gun is a Spartan Delta SX18 M4, any ideas on why the fps could have dropped would be amazing, thanks for your help mate 

Link to comment
Share on other sites

Guessing this is your first time opening a gearbox? If so, it’s likely you’ve put something back wrong or forgotten to do something. 

 

Is the spring the only only thing you’ve changed? 

Link to comment
Share on other sites

might be worth checking that the hop unit is sitting against the gearbox properly. It sounds like you have got an air leak. Is the hop set correctly ? having no hop on can cause a low fps, is the nozzle ok ? no signs of damage from removing the box ?

Link to comment
Share on other sites

8 minutes ago, Joyfull69 said:

Yeah the spring is the only thing I have touched, it's a quick change system too so I didn't even have to open the gearbox to do it, thanks for taking the time to help me out with this mate 

 

 

Swapped the old one back? 

Link to comment
Share on other sites

very rarely will changing a spring cause 150fps drop, however there's always that chance the something in the gearbox is misaligned or very slim chance cracked the piston head.  You may have to open it up.

- What was the fps before the new spring was added?
- As E2 mentioned have you tried putting the original spring back?

Link to comment
Share on other sites

I can't see any signs of damage, it was pretty easy to get to the box, the hop up looks good and fits right to the nozzle.

 

The fps was around 230 as I accidentally cut to much of my old spring off.

I just did a couple test shots as I put it back together, didn't bother cronoing as I could have caught the bbs they were going so slow.

 

I have just noticed that  the Piston (maybe) is not going back where it belongs every time, picture will be below as a picture says 1000 words.

IMG_20190714_213226.jpg

Link to comment
Share on other sites

Don't worry about the piston not going back to the same spot each time that's normal, what you can do as a test to make sure the piston is going all the way back each time is fire it so it's in an uncompressed state and then with a long screwdriver or rod through the nozzle you should be able to push the piston all the way back.  What brand of spring did you fit?

Link to comment
Share on other sites

hmmmmm, when you dry fire with the gearbox out of the hop chamber can you feel a decent amount of air being pushed out of the nozzle?  Only thing I can think off is when you insert a mag something is pushing the hop chamber off alignment, creating a gap that air is escaping

Link to comment
Share on other sites

it's all about eliminating the various components. 

 

Did you take the hop chamber apart and examine the bucking for damage?  That's the next thing to do, good opportunity to give everything a clean as well.

 

you could try shooting it without the lower receiver, holding the mag, barrel etc tight against the gearbox, it's a bit tricky and not the best test, may help

Link to comment
Share on other sites

To be honest mate, I don't have any idea how to take this hop up apart, just looks like solid metal to me.

 

Will try that test tomorrow

Forgot to attach 

IMG_20190714_222015.jpg

I managed to take the hop up unit apart and the bucking looks good to me, no noticable wear on it at all 

Link to comment
Share on other sites

Did you disassemble the whole gearbox or just change the spring via the quick change spring guide?

 

*edit*

just read the thread properly, answers my question 🤦🏼‍♂️

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...