v3 trigger problem

fi3re · October 17th, 2010, 20:00

TM MP5k trigger requires very hard pull to fire in both semi and auto.
The problem seemed to get worse, at first it only required a semi hard pull, but now requires severe squeezing.
Took apart gearbox cleaned electrical connections (pretty dirty) and problem was still there, not improved at all.

Does anyone have experience with v3 mechboxes having trigger contact issues? the trigger nub (the part that moves forward when trigger is pulled, has no problem touching two connections its supposed to fit in between.

audi_bhoy · October 17th, 2010, 21:18

I'd try to move the nub separately by hand, there might be some stuff stacking in his rails.

BobbyDangerous · October 17th, 2010, 21:22

Maybe try cleaning the contacts? Maybe try separating them a little more for some better ease? Hard to say i don't have a V3 gearbox..

Dart · October 17th, 2010, 21:22

are the contacts bent in by any chance? do you have the spring on the trigger set in the right place? Is anything binding? Is the axle clean and clear of any debris? is the cut off lever working properly and not getting stuck part way there for blocking the trigger... make sure the spring is in it.

venture · October 17th, 2010, 23:02

How do you mean "hard to pull"?

Is it 1. stuck then releases and is easy until the next pull? or 2. hard to pull and doesn't return because the spring can't return the trigger?

fi3re · October 18th, 2010, 02:29

I'll take it apart soon and carefully inspect it again. I've taken apart V3 mechboxes many times before and didnt notice ANYTHING missing or out of place. all springs are where they should be. Connections were not bent and were very clean after I cleaned it. will try bending the bars very slightly to make better contact...

Basically it feels like it only makes contact at the very end of the trigger pull. Trigger pulls fine like normal but its like I have to push it further than it should travel to get a contact.

btw right now the gun is not firing at all. fired a shot semi and then nothing worked after. This occurs sometimes in semi-auto but afaik thats normal in aeg's. Still, I suspect cut-off lever is screwing up.

Amos · October 18th, 2010, 02:53

Any chance I could get a picture of the trigger contacts?

fi3re · October 18th, 2010, 04:22

dont have time atm midterms coming up....but will get them up asap

thanks for willing to help me out

BobbyDangerous · October 18th, 2010, 17:15

Sounds like the contacts are either dirty and or too close together. Something cause friction or a tight squeeze.. More or less a common sense issue i would think.. Hell maybe even the alignment is off

fi3re · October 30th, 2010, 22:13

so I finally had the chance to take apart my gun...sorry forgot to take pics of process....didnt have much time
took out contacts and sanded them down to a smooth shiny surface. (they were STILL pretty grimy after I cleaned them last time)

tried it, NOTHING. No shot whatsoever.

So then I investigated EVERYTHING electrical. there was nothing visibly wrong. I decided to bend the contacts inwards so there is MORE friction between the wedge and twin bars. THAT did the trick. I guess there wasnt enough surface area touching to start a connection....(I know makes no sense but that was the case)

I'm a little worried that the problem will arise again in the future.
Does anyone else have a similar problem with a good fix?

Styrak · October 30th, 2010, 23:13

Quote:

Originally Posted by fi3re

So then I investigated EVERYTHING electrical. there was nothing visibly wrong. I decided to bend the contacts inwards so there is MORE friction between the wedge and twin bars. THAT did the trick. I guess there wasnt enough surface area touching to start a connection....(I know makes no sense but that was the case)

Makes sense even from the symptoms in your first post.

ThunderCactus · October 31st, 2010, 02:07

If it's a TM MP5K, wouldn't it be a V2 mechbox....?
Anyway, check the contacts on your selector plate. Take it off the mechbox and scrub the film off the conductors.

Styrak · October 31st, 2010, 02:46

Quote:

Originally Posted by ThunderCactus

If it's a TM MP5K, wouldn't it be a V2 mechbox....?
Anyway, check the contacts on your selector plate. Take it off the mechbox and scrub the film off the conductors.

MP5K's are V3.
Also, it was solved in that last post (no connection in the trigger contacts so he bent them inwards)

fi3re · October 31st, 2010, 03:00

yup V3 I am 1000% sure

Selector plate doesnt move when trigger is pulled so that doesnt correspond with me having to pull the trigger super hard to fire a shot.

selector plate was clean btw, nothing like trigger contacts

ThunderCactus · October 31st, 2010, 03:49

K, my bad
It doesn't matter that it doesn't move, I've seen some on and off trigger issues that were caused by the selector plate before. And I've seen even stranger things cause trigger malfunctions lol
What kind of battery are you running?

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October 17th, 2010, 20:00	#1
fi3re Trader rating Join Date: Aug 2008 Location: Tdot scarberia	v3 trigger problem TM MP5k trigger requires very hard pull to fire in both semi and auto. The problem seemed to get worse, at first it only required a semi hard pull, but now requires severe squeezing. Took apart gearbox cleaned electrical connections (pretty dirty) and problem was still there, not improved at all. Does anyone have experience with v3 mechboxes having trigger contact issues? the trigger nub (the part that moves forward when trigger is pulled, has no problem touching two connections its supposed to fit in between.

October 17th, 2010, 21:22	#3
BobbyDangerous Trader rating Join Date: Mar 2010 Location: Oshawa	Maybe try cleaning the contacts? Maybe try separating them a little more for some better ease? Hard to say i don't have a V3 gearbox.. __________________ -Dangerous- BA Level 3 Certified

October 17th, 2010, 23:02	#5
venture Trader rating Join Date: Jun 2005 Location: Halifax	How do you mean "hard to pull"? Is it 1. stuck then releases and is easy until the next pull? or 2. hard to pull and doesn't return because the spring can't return the trigger? __________________ Visit us at :www.ventureairsoft.ca

October 17th, 2010, 21:18	#2
audi_bhoy Trader rating Join Date: Mar 2009 Location: Trois-Rivières	I'd try to move the nub separately by hand, there might be some stuff stacking in his rails.

October 17th, 2010, 21:22	#4
Dart Trader rating Join Date: Apr 2009 Location: Grande Prairie Alberta	are the contacts bent in by any chance? do you have the spring on the trigger set in the right place? Is anything binding? Is the axle clean and clear of any debris? is the cut off lever working properly and not getting stuck part way there for blocking the trigger... make sure the spring is in it.

October 18th, 2010, 02:29	#6
fi3re Trader rating Join Date: Aug 2008 Location: Tdot scarberia	I'll take it apart soon and carefully inspect it again. I've taken apart V3 mechboxes many times before and didnt notice ANYTHING missing or out of place. all springs are where they should be. Connections were not bent and were very clean after I cleaned it. will try bending the bars very slightly to make better contact... Basically it feels like it only makes contact at the very end of the trigger pull. Trigger pulls fine like normal but its like I have to push it further than it should travel to get a contact. btw right now the gun is not firing at all. fired a shot semi and then nothing worked after. This occurs sometimes in semi-auto but afaik thats normal in aeg's. Still, I suspect cut-off lever is screwing up.

October 18th, 2010, 02:53	#7
Amos Trader rating Join Date: Aug 2006 Location: Japan	Any chance I could get a picture of the trigger contacts? __________________ Custom Builds: FA3674U Krinkov G3SD6

October 18th, 2010, 04:22	#8
fi3re Trader rating Join Date: Aug 2008 Location: Tdot scarberia	dont have time atm midterms coming up....but will get them up asap thanks for willing to help me out

October 18th, 2010, 17:15	#9
BobbyDangerous Trader rating Join Date: Mar 2010 Location: Oshawa	Sounds like the contacts are either dirty and or too close together. Something cause friction or a tight squeeze.. More or less a common sense issue i would think.. Hell maybe even the alignment is off __________________ -Dangerous- BA Level 3 Certified

October 30th, 2010, 22:13	#10
fi3re Trader rating Join Date: Aug 2008 Location: Tdot scarberia	so I finally had the chance to take apart my gun...sorry forgot to take pics of process....didnt have much time took out contacts and sanded them down to a smooth shiny surface. (they were STILL pretty grimy after I cleaned them last time) tried it, NOTHING. No shot whatsoever. So then I investigated EVERYTHING electrical. there was nothing visibly wrong. I decided to bend the contacts inwards so there is MORE friction between the wedge and twin bars. THAT did the trick. I guess there wasnt enough surface area touching to start a connection....(I know makes no sense but that was the case) I'm a little worried that the problem will arise again in the future. Does anyone else have a similar problem with a good fix?

October 31st, 2010, 02:07	#12
ThunderCactus Not Eye Safe, Pretty Boy Maximus on the field take his picture! Trader rating Join Date: Feb 2007	If it's a TM MP5K, wouldn't it be a V2 mechbox....? Anyway, check the contacts on your selector plate. Take it off the mechbox and scrub the film off the conductors.

October 31st, 2010, 03:00	#14
fi3re Trader rating Join Date: Aug 2008 Location: Tdot scarberia	yup V3 I am 1000% sure Selector plate doesnt move when trigger is pulled so that doesnt correspond with me having to pull the trigger super hard to fire a shot. selector plate was clean btw, nothing like trigger contacts

October 31st, 2010, 03:49	#15
ThunderCactus Not Eye Safe, Pretty Boy Maximus on the field take his picture! Trader rating Join Date: Feb 2007	K, my bad It doesn't matter that it doesn't move, I've seen some on and off trigger issues that were caused by the selector plate before. And I've seen even stranger things cause trigger malfunctions lol What kind of battery are you running?

v3 trigger problem

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