G&G Firehawk Motor / Gearbox Issue

[Floperator]

Thoughts and prayers

 

[Connorthescot]

Morning all!
@Floperator - Thoughts and prayers definitely needed, managed to get the box open without it blasting everywhere with that damn spring ?

So the contact on the trigger switch / shuttle (not exactly sure what the name is) is tinged orange / red. I could not find a good reference online for a 'burnt' contact but judging by the colour of the other contacts then this does not look right.

I might connect up the battery again and test voltage pass through up to the contacts, then make contact with the trigger and see if I am getting anything from the bad looking contact.

@Fatboy40 - That might be a good shout and a very generous offer! Shall I PM you and we can arrange that?

At this point, I am thinking that dropping in the other gearbox is easiest considering this is a hand me down firehawk.

 

[Adolf Hamster]

So the contact on the trigger switch / shuttle (not exactly sure what the name is) is tinged orange / red. I could not find a good reference online for a 'burnt' contact but judging by the colour of the other contacts then this does not look right.

you mean the metallic portion? could just be the plating has worn off.

what you're looking for is black carbon/sooty buildup, or damage to the contacts, usually it's one of the outer contacts that goes (depending which is wired to +ve/-ve)

a gentle rubbing with a fine sandpaper will clean off any residue.

 

[Fatboy40]

@Fatboy40 - That might be a good shout and a very generous offer! Shall I PM you and we can arrange that?

At this point, I am thinking that dropping in the other gearbox is easiest considering this is a hand me down firehawk.

If you're interested feel free to PM me, but only if you're sure you need it as I like building up a supply of spare parts.

Also regarding swapping in another gearbox please be aware that Firehawk is somewhat special as it uses a closed / full cylinder, this is what give it the "crack" noise and also as it uses a very short inner barrel so needs the air volume, also it uses as stock a very strong M130 spring. If you do a full gearbox swap, and it has in it say a 3/4 cylinder and a standard AEG spring, you may lose a huge amount of FPS (taking you well below 300 FPS on 0.20g BBs)

 

[Connorthescot]

Photo below for reference, it looks as if someone has been in here before and tried giving that contact a scrape but yeah thats the contact I am concerned about.

No carbon or black buildup immediately visible though but I think I will take the whole mechanism out for inspection.

View attachment 92064

 

[Adolf Hamster]

those contacts look pretty damn clean, although the build up that counts is between them (ie not visible in the shot).

also worth checking that the contacts are actually touching properly when the trolley is forwards, could be they've been bent wider by whoever previously gave them a scraping and now they ain't touching.

 

[Connorthescot]

Reporting back, and thankfully the firehawk has come back to life!

So bottom line is that the trigger contacts were 1) a little grubby and needed a clean and 2) the actually positioning of the trigger contacts was a bit off so contact was not being made consistantly.

Thankfully, managed to get everything back together again and she is shooting great - so far! Game day on Sunday so will take this a long to see how it gets on.

Thanks for the help all!