PSG1 gearbox problem

Doubleagent · May 18th, 2014, 17:11

Hi, I just bought a PSG1 AEG used and here is the problem I need help with.

Whenever I fire the gun, it fires full auto and at the end of the cycle, the gear spins backwards which cause damage to the delayer on the sector gear (from it slamming against the cutoff lever)which in turn damage the tappet plate(the part that contact the sector gear).

I re-do the gearbox but notice that the trigger switch cause the cut off lever to activate the anti reversal latch which keeps it in the free wheel mode. I have taken the switch apart and didn't find anything wrong with it so I don't know what else to do.

I really like the gun so I would appreciate any help on this.

GBBR · May 20th, 2014, 01:53

TM or G&G?

Doubleagent · May 21st, 2014, 00:31

It's a TM. After a lengthy investigation I found that the cut off lever, the part that goes into the trigger switch is slightly bent and touching the side of the switch which is causing the lever to stick. I use heat to straighten it. After two tries I got it but now the gun does not cycles properly. sometimes it's OK and other times it won't complete the cycle. Well at least the cut off lever works now along with the decocker function.
Still need help.

Kos-Mos · May 21st, 2014, 12:17

What battery/spring are you running.

I had to crank a 10.4v battery in mine to cycle reliably (before LiPos, that was years ago).

Doubleagent · May 22nd, 2014, 03:09

I've been using a 7.4v 4000 mAh Lipo battery to power it. The spring is a m120 of some unknown brand. I will get a stronger battery and try to see if that helps. For now until I get the battery I'll be working on it not feeding due to the nozzle not going back enough to let in the bb. Thanks.

Doubleagent · June 2nd, 2014, 03:38

So I've fixed the feeding problem. I had to costume make a new delayer the the sector gear, so that's fine now. I tried using a 11.1v Lipo battery and it's the same issue with the gun not cycling all the way on some shoots but other times it seems okay. I'm thinking it's between the cut off lever and the trigger switch.
Still need some idea how to fix this.

ThunderCactus · June 2nd, 2014, 10:31

Does the delayer on your sector look like this one?
http://img3.redwolfairsoft.com/uploa...K12-PSG1-L.jpg

And is the anti reversal latchy cage thing bent?

Doubleagent · June 3rd, 2014, 01:44

Yes, the delayer looks the same. The anti reversal latch is ok, it's cut off lever on mine was bent and I straightened it but it's still not perfect and I'm afraid if is mess with it again it will break.

Doubleagent · June 22nd, 2014, 02:47

So I've finally got my PSG1 to shoot properly, the only dislike is that it screams like a little pig or a baby on steroids. I've shim the gears and recheck them so I'll just have to live with the noise. It shoots 481 FPS on a M120 spring so I'm happy about that. Special thanks to the people who commented and help with ideas.

Doubleagent · March 30th, 2015, 18:53

Well finally got the gun to where I wanted. I changed the motor to a high torque TIENLY motor and problem solved BUMM.

Home	Forums	Register	Gallery	FAQ	Calendar
Retailers	Community	News/Info	International Retailers	IRC	Today's Posts

British Columbia	Alberta
BCAC	EAR
Op-For	JOC
Northern Arms Airsoft	Skunkworx Airsoft
Airsoft Kelowna	RAAT
Prince George Airsoft	Manitoba
Saskatchewan	MAA
SK Airsoft	Ontario
PDW	Airsoft Ottawa
South Sask Mercs	Snow Dragons
Quebec	1st Ranger Platoon
PQAC	Wolfpack Tactical
1st Pathfinders Regiment	TTAC3
Quebec Airsoft
MTX Airsoft	Atlantic
FAQc	Atlantic Airsoft

May 18th, 2014, 17:11	#1
Doubleagent Trader rating Join Date: Jul 2011 Location: Lower mainland ,BC	PSG1 gearbox problem Hi, I just bought a PSG1 AEG used and here is the problem I need help with. Whenever I fire the gun, it fires full auto and at the end of the cycle, the gear spins backwards which cause damage to the delayer on the sector gear (from it slamming against the cutoff lever)which in turn damage the tappet plate(the part that contact the sector gear). I re-do the gearbox but notice that the trigger switch cause the cut off lever to activate the anti reversal latch which keeps it in the free wheel mode. I have taken the switch apart and didn't find anything wrong with it so I don't know what else to do. I really like the gun so I would appreciate any help on this. __________________ . . Stop sharing fight and hate video. Last edited by Doubleagent; May 19th, 2014 at 01:31.. Reason: spelling

May 21st, 2014, 00:31	#3
Doubleagent Trader rating Join Date: Jul 2011 Location: Lower mainland ,BC	It's a TM. After a lengthy investigation I found that the cut off lever, the part that goes into the trigger switch is slightly bent and touching the side of the switch which is causing the lever to stick. I use heat to straighten it. After two tries I got it but now the gun does not cycles properly. sometimes it's OK and other times it won't complete the cycle. Well at least the cut off lever works now along with the decocker function. Still need help. __________________ . . Stop sharing fight and hate video.

May 22nd, 2014, 03:09	#5
Doubleagent Trader rating Join Date: Jul 2011 Location: Lower mainland ,BC	I've been using a 7.4v 4000 mAh Lipo battery to power it. The spring is a m120 of some unknown brand. I will get a stronger battery and try to see if that helps. For now until I get the battery I'll be working on it not feeding due to the nozzle not going back enough to let in the bb. Thanks. __________________ . . Stop sharing fight and hate video. Last edited by Doubleagent; May 22nd, 2014 at 15:30..

May 20th, 2014, 01:53	#2
GBBR Banned Trader rating Join Date: Sep 2012 Location: Toronto	TM or G&G?

June 2nd, 2014, 03:38	#6
Doubleagent Trader rating Join Date: Jul 2011 Location: Lower mainland ,BC	So I've fixed the feeding problem. I had to costume make a new delayer the the sector gear, so that's fine now. I tried using a 11.1v Lipo battery and it's the same issue with the gun not cycling all the way on some shoots but other times it seems okay. I'm thinking it's between the cut off lever and the trigger switch. Still need some idea how to fix this. __________________ . . Stop sharing fight and hate video.

June 2nd, 2014, 10:31	#7
ThunderCactus Not Eye Safe, Pretty Boy Maximus on the field take his picture! Trader rating Join Date: Feb 2007	Does the delayer on your sector look like this one? http://img3.redwolfairsoft.com/uploa...K12-PSG1-L.jpg And is the anti reversal latchy cage thing bent?

June 3rd, 2014, 01:44	#8
Doubleagent Trader rating Join Date: Jul 2011 Location: Lower mainland ,BC	Yes, the delayer looks the same. The anti reversal latch is ok, it's cut off lever on mine was bent and I straightened it but it's still not perfect and I'm afraid if is mess with it again it will break. __________________ . . Stop sharing fight and hate video.

June 22nd, 2014, 02:47	#9
Doubleagent Trader rating Join Date: Jul 2011 Location: Lower mainland ,BC	So I've finally got my PSG1 to shoot properly, the only dislike is that it screams like a little pig or a baby on steroids. I've shim the gears and recheck them so I'll just have to live with the noise. It shoots 481 FPS on a M120 spring so I'm happy about that. Special thanks to the people who commented and help with ideas. __________________ . . Stop sharing fight and hate video.

March 30th, 2015, 18:53	#10
Doubleagent Trader rating Join Date: Jul 2011 Location: Lower mainland ,BC	Well finally got the gun to where I wanted. I changed the motor to a high torque TIENLY motor and problem solved BUMM. __________________ . . Stop sharing fight and hate video.

PSG1 gearbox problem

Doctor's Corner