G&G Combat Machine M4

HaloSix4 · August 8th, 2009, 02:13

So, I got this gun of of the Classifieds, not long after getting it I had a problem with it, first the BBS were jamming up fixed that. about 30 shots later it started to make a very loud grinding noise. I adjusted the Motor and that did not fix it, took the motor out and reseated, it no luck, now I have lots of guns, so I let it sit in a corner until I had time for it.

So I am about to work on it but when I pulled the trigger it would not move, it is jammed there hard, so I can figure out what the problem is, and I really don't want to fuck it up worse, because I do not know how to work on the BlowBack system, Any help would work.

Thanks

sushicake · August 8th, 2009, 02:36

It's sounds like you shredded a gear or two. Or you could of snapped the tappet plate and it's jamming up the gears, the only way to find out is to take out the gearbox and check. Also the blowback system on a G&G has nothing to do with the internals, it's actually a tiny spring piston thingy that sits ontop of the gearbox.

HaloSix4 · August 8th, 2009, 02:41

Ya, just don't want to take off the BlowBack and not know how to put it back on, well I'll take it apart and see.

HaloSix4 · August 11th, 2009, 22:05

Ok, so now that I have time to work on it I ran into another snag, after removing the cap for the Stock tube, to remove the long screw, for some resin it is striped, I can't even get the Screw Driver into the Head of the Screw.

HaloSix4 · August 27th, 2009, 18:29

So now, I have taken it apart everything looks fine, after putting it back together the same thing happens it is just a screeching sound.

jtf2-phalanx · August 27th, 2009, 20:36

When you say everything looks fine, does that mean you opened the mechbox to check if the gears and piston teeth are all okay? It just sounds like something is stripped.

Amos · August 27th, 2009, 20:44

motor height?

HaloSix4 · August 27th, 2009, 21:30

Ya everything is good internal wise, gears are intact, every thing looks in working order.
I've adjusted the motor as well that does not change anything.

yuhaoyang · August 27th, 2009, 23:00

pics of the open mechbox would help lots.

BORDENSNIPER · August 28th, 2009, 02:04

check the pinion gear on the motor.

also, run the motor not attached to the gun, it might be a motor problem such as a piece of watever is stuck in it and grinding.

HaloSix4 · August 28th, 2009, 02:18

Motor looks and sounds fine when not in the gun.

Kos-Mos · August 29th, 2009, 19:06

Take pliers, hold the motor pinion.

Plug it and fire while holding the motor body and pinion.

If it does the grinding, it is because the pinion got lose.

You can remove it with a puller and install one that uses a set screw to stay in place.

HaloSix4 · August 30th, 2009, 02:25

Nope that does not work but the motor does not move when held by the pliers

HaloSix4 · September 2nd, 2009, 18:06

Okay, so after taking it apart again I noticed that one gear has a tooth snapped off, will that cause the grinding noise, If I'm going to order new gear I just want to make sure that's the problem. Looks like this

Only the lower gear though

Thanks

HaloSix4 · September 4th, 2009, 17:27

I'm going to order a gear set, what do you guys think would be best to go with.

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August 8th, 2009, 02:13	#1
HaloSix4 aka Halo64 Trader rating Join Date: Jul 2007 Location: Omemee, ON	G&G Combat Machine M4 So, I got this gun of of the Classifieds, not long after getting it I had a problem with it, first the BBS were jamming up fixed that. about 30 shots later it started to make a very loud grinding noise. I adjusted the Motor and that did not fix it, took the motor out and reseated, it no luck, now I have lots of guns, so I let it sit in a corner until I had time for it. So I am about to work on it but when I pulled the trigger it would not move, it is jammed there hard, so I can figure out what the problem is, and I really don't want to fuck it up worse, because I do not know how to work on the BlowBack system, Any help would work. Thanks

August 8th, 2009, 02:36	#2
sushicake Trader rating Join Date: Dec 2008 Location: Markham, ON	It's sounds like you shredded a gear or two. Or you could of snapped the tappet plate and it's jamming up the gears, the only way to find out is to take out the gearbox and check. Also the blowback system on a G&G has nothing to do with the internals, it's actually a tiny spring piston thingy that sits ontop of the gearbox. __________________ "Don't you know the first law of physics? Anything fun costs atleast $8" Last edited by sushicake; August 8th, 2009 at 02:39..

August 27th, 2009, 20:36	#6
jtf2-phalanx Trader rating Join Date: Dec 2001 Location: Vancouver, BC	When you say everything looks fine, does that mean you opened the mechbox to check if the gears and piston teeth are all okay? It just sounds like something is stripped. __________________ "Any punk can shoot from across the room but it takes a real man to get close enough to stab" "Why cause a huge disturbance when you just wanna kill ONE guy?" - Chris Rock

August 8th, 2009, 02:41	#3
HaloSix4 aka Halo64 Trader rating Join Date: Jul 2007 Location: Omemee, ON	Ya, just don't want to take off the BlowBack and not know how to put it back on, well I'll take it apart and see.

August 11th, 2009, 22:05	#4
HaloSix4 aka Halo64 Trader rating Join Date: Jul 2007 Location: Omemee, ON	Ok, so now that I have time to work on it I ran into another snag, after removing the cap for the Stock tube, to remove the long screw, for some resin it is striped, I can't even get the Screw Driver into the Head of the Screw.

August 27th, 2009, 18:29	#5
HaloSix4 aka Halo64 Trader rating Join Date: Jul 2007 Location: Omemee, ON	So now, I have taken it apart everything looks fine, after putting it back together the same thing happens it is just a screeching sound.

August 27th, 2009, 20:44	#7
Amos Trader rating Join Date: Aug 2006 Location: Japan	motor height? __________________ Custom Builds: FA3674U Krinkov G3SD6

August 27th, 2009, 21:30	#8
HaloSix4 aka Halo64 Trader rating Join Date: Jul 2007 Location: Omemee, ON	Ya everything is good internal wise, gears are intact, every thing looks in working order. I've adjusted the motor as well that does not change anything.

August 27th, 2009, 23:00	#9
yuhaoyang asexual lumbricus terrestris Trader rating Join Date: Jan 2009 Location: Edmonton west	pics of the open mechbox would help lots.

August 28th, 2009, 02:04	#10
BORDENSNIPER Trader rating Join Date: Feb 2005	check the pinion gear on the motor. also, run the motor not attached to the gun, it might be a motor problem such as a piece of watever is stuck in it and grinding.

August 28th, 2009, 02:18	#11
HaloSix4 aka Halo64 Trader rating Join Date: Jul 2007 Location: Omemee, ON	Motor looks and sounds fine when not in the gun.

August 30th, 2009, 02:25	#13
HaloSix4 aka Halo64 Trader rating Join Date: Jul 2007 Location: Omemee, ON	Nope that does not work but the motor does not move when held by the pliers

September 2nd, 2009, 18:06	#14
HaloSix4 aka Halo64 Trader rating Join Date: Jul 2007 Location: Omemee, ON	Okay, so after taking it apart again I noticed that one gear has a tooth snapped off, will that cause the grinding noise, If I'm going to order new gear I just want to make sure that's the problem. Looks like this Only the lower gear though Thanks

September 4th, 2009, 17:27	#15
HaloSix4 aka Halo64 Trader rating Join Date: Jul 2007 Location: Omemee, ON	I'm going to order a gear set, what do you guys think would be best to go with.

G&G Combat Machine M4

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