Gears problems

Fallen · September 27th, 2009, 19:30

My friend had a ICS M16A3 and he had a little problem with it. After firing some bb's this weekend, his gun starts making a strange noise and stop shooting. I take off the upper gearbox and I tried to shoot. The gear were turning?!?
I disassemble all the gear box and I check if the gear and the motor were striped, but they weren't!?!

So I tried to shoot again, but the gun don't fire. The lower gear was turning, the anti-reversal latch were moving, But the top gear don't move and i can't see if the middle one is turning or not.

So when I'm firing, the motor is turning but the piston doesn't move. Any one know what's the problem?

Edit: He changed is spring for and M120 and all other thing was stock.

Styrak · September 27th, 2009, 20:30

If the top gear (or middle gear as well) isn't moving when others are, then there's a stripped gear in there somewhere.

If all the gears are moving, then it's a stripped piston.

Fallen · September 27th, 2009, 20:38

That's was I was thinking. But I checked all the gear and try them and no one was striped. All the gear are turning when the upper gearbox is not in place. But when i put it, it stop. I can hear something turning and and something scratching like if the motor was not enough high.

So you think that the second or the third gear is stripped?

m102404 · September 27th, 2009, 21:23

I'll bet you a $1 that the axle of one of the gears has come loose.

Some of the gears are two gears pressed together on one axle...betcha one has come loose an isn't turning.

Take the lower mechbox apart and inspect each gear very carefully.

Fallen · September 27th, 2009, 21:28

How can i check that? And if the gear is loose or striped, do I need t buy a new one?

m102404 · September 27th, 2009, 21:33

Just twist and turn each gear by hand. Try to separate them and see if they move.

If the axle has come loose...or if any of the teeth are stripped...buy new gears.

ujiro · September 27th, 2009, 21:33

Yes if it is stripped or has come loose like m102404 explained then you would need to buy a new one. Unfortunately, buying single gears isn't very easy (usually), so you would probably have to buy a whole new gear set. Especially since interchanging gears, and using one make of gear with 2 other of a different brand is a bad idea.

Fallen · September 27th, 2009, 22:01

Ok thank you! I tried to turn them by hand and check if the teeth were striped and i dont see anything. But they can be just enough striped to be not able to pull the piston and just enough to turn while the piston is not on. What I will see if the gears are loose?

And wich gear set will fit in ICS gearbox?

Thank you all!

heikis · September 28th, 2009, 09:16

your piston is stripped. could be a bad AOE. be careful when trying a new one. i stripped 2 pistons in a row because of a bad AOE due to an old (stock plastic) cylinder head.

stripped ICS m4 gears? i dont think so. rarely happens

venture · September 28th, 2009, 09:56

Quote:

Originally Posted by heikis

your piston is stripped. could be a bad AOE. be careful when trying a new one. i stripped 2 pistons in a row because of a bad AOE due to an old (stock plastic) cylinder head.

stripped ICS m4 gears? i dont think so. rarely happens

Sorry to be dense, but what is AOE?

heikis · September 28th, 2009, 10:04

Angle of engagement

Fallen · September 28th, 2009, 10:57

I don't think my piston is striped because the upper gear doesn't move when firing. Only the lower move. Could it be because he changes his spring for and m120 and the gears are not enough strong for that spring?

venture · September 28th, 2009, 11:13

Quote:

Originally Posted by heikis

Angle of engagement

Thanks for the very good answer with no extra flaming or anything.

m102404 · September 28th, 2009, 11:42

With a split ICS mechbox it's pretty easy to see if the piston is stripped...just look up into the upper mechbox. I use a metal rod that you can push down through the nozzle to push the piston back so you can see the whole rack without taking it apart (easier to put the end of the rod on a table and push the whole upper mechbox down onto it).

If your pinion gear is stripped/worn or if the motor is backed off enough...you might get a bad grinding sound. But it would kind of do that anytime, even with the upper mechbox off.

If you're looking at just the lower mechbox and you pull the trigger...if the motor turns and some of the gears are turning...but the sector gear isn't turning...then you have a gear that's broken from the axle or a section of stripped teeth. There's nothing else that causes that. (NOTE: If things are shimmed soooo badly that there's no tooth to tooth contact...that'll cause it to....)

Did to you try pushing the axle of the bevel gear from side to side to see if the gear body comes unseated?

Fallen · September 28th, 2009, 18:39

Thank you guys. I think i found the problem, the axle of the second gear seems to be loose =(.

Anyone know wich brands of gears will fit in an ICS mechbox? And with an M120 spring, do I need high torque gears or can I use highspeed?

It those one will fit?

http://www.airsoftparts.ca/store2/in...roducts_id=567

http://www.airsoftparts.ca/store2/in...oducts_id=1238

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

September 27th, 2009, 19:30	#1
Fallen formerly Qc_Sarado Trader rating Join Date: Nov 2008 Location: Montreal Southshore	Gears problems My friend had a ICS M16A3 and he had a little problem with it. After firing some bb's this weekend, his gun starts making a strange noise and stop shooting. I take off the upper gearbox and I tried to shoot. The gear were turning?!? I disassemble all the gear box and I check if the gear and the motor were striped, but they weren't!?! So I tried to shoot again, but the gun don't fire. The lower gear was turning, the anti-reversal latch were moving, But the top gear don't move and i can't see if the middle one is turning or not. So when I'm firing, the motor is turning but the piston doesn't move. Any one know what's the problem? Edit: He changed is spring for and M120 and all other thing was stock. Last edited by Fallen; September 27th, 2009 at 19:33..

September 27th, 2009, 20:30	#2
Styrak Trader rating Join Date: Jan 2007 Location: Saskatoon, SK	If the top gear (or middle gear as well) isn't moving when others are, then there's a stripped gear in there somewhere. If all the gears are moving, then it's a stripped piston. __________________ Airsoft Sales and Repair/Upgrade Services

September 27th, 2009, 21:33	#7
ujiro Trader rating Join Date: Aug 2006 Location: Burlington, ON	Yes if it is stripped or has come loose like m102404 explained then you would need to buy a new one. Unfortunately, buying single gears isn't very easy (usually), so you would probably have to buy a whole new gear set. Especially since interchanging gears, and using one make of gear with 2 other of a different brand is a bad idea. __________________ I love freedom and consequently America

September 27th, 2009, 20:38	#3
Fallen formerly Qc_Sarado Trader rating Join Date: Nov 2008 Location: Montreal Southshore	That's was I was thinking. But I checked all the gear and try them and no one was striped. All the gear are turning when the upper gearbox is not in place. But when i put it, it stop. I can hear something turning and and something scratching like if the motor was not enough high. So you think that the second or the third gear is stripped?

September 27th, 2009, 21:23	#4
m102404 Tys Trader rating Join Date: Apr 2006 Location: Toronto	I'll bet you a $1 that the axle of one of the gears has come loose. Some of the gears are two gears pressed together on one axle...betcha one has come loose an isn't turning. Take the lower mechbox apart and inspect each gear very carefully.

September 27th, 2009, 21:28	#5
Fallen formerly Qc_Sarado Trader rating Join Date: Nov 2008 Location: Montreal Southshore	How can i check that? And if the gear is loose or striped, do I need t buy a new one?

September 27th, 2009, 22:01	#8
Fallen formerly Qc_Sarado Trader rating Join Date: Nov 2008 Location: Montreal Southshore	Ok thank you! I tried to turn them by hand and check if the teeth were striped and i dont see anything. But they can be just enough striped to be not able to pull the piston and just enough to turn while the piston is not on. What I will see if the gears are loose? And wich gear set will fit in ICS gearbox? Thank you all!

September 28th, 2009, 09:16	#9
heikis Trader rating Join Date: Jan 2009 Location: ESTONIA	your piston is stripped. could be a bad AOE. be careful when trying a new one. i stripped 2 pistons in a row because of a bad AOE due to an old (stock plastic) cylinder head. stripped ICS m4 gears? i dont think so. rarely happens

September 28th, 2009, 10:04	#11
heikis Trader rating Join Date: Jan 2009 Location: ESTONIA	Angle of engagement

September 28th, 2009, 10:57	#12
Fallen formerly Qc_Sarado Trader rating Join Date: Nov 2008 Location: Montreal Southshore	I don't think my piston is striped because the upper gear doesn't move when firing. Only the lower move. Could it be because he changes his spring for and m120 and the gears are not enough strong for that spring?

September 28th, 2009, 11:42	#14
m102404 Tys Trader rating Join Date: Apr 2006 Location: Toronto	With a split ICS mechbox it's pretty easy to see if the piston is stripped...just look up into the upper mechbox. I use a metal rod that you can push down through the nozzle to push the piston back so you can see the whole rack without taking it apart (easier to put the end of the rod on a table and push the whole upper mechbox down onto it). If your pinion gear is stripped/worn or if the motor is backed off enough...you might get a bad grinding sound. But it would kind of do that anytime, even with the upper mechbox off. If you're looking at just the lower mechbox and you pull the trigger...if the motor turns and some of the gears are turning...but the sector gear isn't turning...then you have a gear that's broken from the axle or a section of stripped teeth. There's nothing else that causes that. (NOTE: If things are shimmed soooo badly that there's no tooth to tooth contact...that'll cause it to....) Did to you try pushing the axle of the bevel gear from side to side to see if the gear body comes unseated?

September 28th, 2009, 18:39	#15
Fallen formerly Qc_Sarado Trader rating Join Date: Nov 2008 Location: Montreal Southshore	Thank you guys. I think i found the problem, the axle of the second gear seems to be loose =(. Anyone know wich brands of gears will fit in an ICS mechbox? And with an M120 spring, do I need high torque gears or can I use highspeed? It those one will fit? http://www.airsoftparts.ca/store2/in...roducts_id=567 http://www.airsoftparts.ca/store2/in...oducts_id=1238

Gears problems

Doctor's Corner