What Could have Caused This?

[MLA PRO]

So yesterday i was skirmishing with my gun. Its a KWA M4 with CA wiring. I was using the gun for a few hours, and the last game of the night, this happens. It wasnt acting strange at all before it happened. It was just sudden. My gears made an awful noise then the gun stopped firing. (I was using a King Arms lipo). I go home and open up the gearbox and the anit-reversal latch was broken in half. The anti-reversal latch spring was also de-sprung I guess you could say. (I dont know what to call it.) So what may have caused this?

[axisofoil]

An anti-reversal latch that isn't strong enough for the spring you are using or using a spring that is too strong for the anti-reversal latch are the usual causes for a broken anti-reversal latch.

And yes, I realize that those two causes are the same thing worded differently.

[carbon14c]

The anti-reversal latch spring was also de-sprung I guess you could say. (I dont know what to call it.)

i know this doesn't help with your original problem, but for future troubleshooting reference i believe the term is "decompressed"

[MLA PRO]

The anti-reversal latch spring was also de-sprung I guess you could say. (I dont know what to call it.)

i know this doesn't help with your original problem, but for future troubleshooting reference i believe the term is "decompressed"

Thanks i couldnt think of the word.

[SGT. DANGLE]

You are operating with a lipo battery, that as you know, has a very high output, causing whatever you attach it to become more responsive and hit harder!

The amount of force the ARL (anti-reverse lever) is under is already strenuous because that little lever is the only piece that prevents your gears from rotating the opposite direction that they are made to operate!

The tension on the main spring that powers the piston pushes it's full force on the gears, which passes on from them to the ARL!

Abusive treatment, overuse, or perhaps just a faulty ARL, are more likely the causes of your little problem! Also; upgraded high tension main springs on non-upgraded geearbox internals (such as the ARL) is just asking for a world of hurt! To your weapon AND to your money. Or your mommy and daddy's money. Or where ever that money comes from it comes from somewhere and either way it's going to be spent.

Suggestion...buy a higher quality anti-reversal lever...or just go easy on the full-auto.

-Sergeant B.A. Dangle

[ScaR_SnipeZ]

i know it says newbie over there <---- but make sure your heat sink plate on the bottom of your motor grip is in the right area (adjust the screw on the bottom) if not.. the pinion gear on your motor could spin where its not supposed to be. if your pinion gear on your motor looks like its stripped, that could be the problem. its happened to me before.

[SGT. DANGLE]

i know it says newbie over there <---- but make sure your heat sink plate on the bottom of your motor grip is in the right area (adjust the screw on the bottom) if not.. the pinion gear on your motor could spin where its not supposed to be. if your pinion gear on your motor looks like its stripped, that could be the problem. its happened to me before.

That is not likely to occur! Especially on an M4 where the motor fits snug into the pistol grip housing which gives it a near perfect alignment to the gears.

[axisofoil]

i know it says newbie over there <---- but make sure your heat sink plate on the bottom of your motor grip is in the right area (adjust the screw on the bottom) if not.. the pinion gear on your motor could spin where its not supposed to be. if your pinion gear on your motor looks like its stripped, that could be the problem. its happened to me before.

That is not likely to occur! Especially on an M4 where the motor fits snug into the pistol grip housing which gives it a near perfect alignment to the gears.

Actually MORE likely to occur in m4 style grips...

The baseplate of the grip adjusts the pinion gear's height in relation to the bevel gear, as opposed to other AEGs where that is a set distance with motor cages.

[SGT. DANGLE]

i know it says newbie over there <---- but make sure your heat sink plate on the bottom of your motor grip is in the right area (adjust the screw on the bottom) if not.. the pinion gear on your motor could spin where its not supposed to be. if your pinion gear on your motor looks like its stripped, that could be the problem. its happened to me before.

That is not likely to occur! Especially on an M4 where the motor fits snug into the pistol grip housing which gives it a near perfect alignment to the gears.

Actually MORE likely to occur in m4 style grips...

The baseplate of the grip adjusts the pinion gear's height in relation to the bevel gear, as opposed to other AEGs where that is a set distance with motor cages.

Staying on topic...the motor has nothing to do with the anti-reverse lever, NOR would it explain that MLA PRO's rifle, as he stated, "wasn't acting strange at all before it happened",  
So putting this aside completely.

I have already gave my input on this matter and take what you need from it and move on!

-Sergeant B.A. Dangle

[TheStenGun]

So yesterday i was skirmishing with my gun. Its a KWA M4 with CA wiring. I was using the gun for a few hours, and the last game of the night, this happens. It wasnt acting strange at all before it happened. It was just sudden. My gears made an awful noise then the gun stopped firing. (I was using a King Arms lipo). I go home and open up the gearbox and the anit-reversal latch was broken in half. The anti-reversal latch spring was also de-sprung I guess you could say. (I dont know what to call it.) So what may have caused this?

If nothing else was damaged I would suggest simply replacing the anti-reversal latch with a new one and reassembling the gearbox. I have pulled a heavily bent one out of a gearbox before, so I would think that had I continued to used the gearbox without service it would have snapped like yours.  The latch is a part that is under stress and failure would not indicate that anything else is necessarily wrong; it may just be a defective individual part.

[Whiskey11]

So yesterday i was skirmishing with my gun. Its a KWA M4 with CA wiring. I was using the gun for a few hours, and the last game of the night, this happens. It wasnt acting strange at all before it happened. It was just sudden. My gears made an awful noise then the gun stopped firing. (I was using a King Arms lipo). I go home and open up the gearbox and the anit-reversal latch was broken in half. The anti-reversal latch spring was also de-sprung I guess you could say. (I dont know what to call it.) So what may have caused this?

If nothing else was damaged I would suggest simply replacing the anti-reversal latch with a new one and reassembling the gearbox. I have pulled a heavily bent one out of a gearbox before, so I would think that had I continued to used the gearbox without service it would have snapped like yours.  The latch is a part that is under stress and failure would not indicate that anything else is necessarily wrong; it may just be a defective individual part.

This


I've ran stock ARL's in various guns at varrying power levels above and beyond what guys here have run (Like SP130's and SP150's, etc) and never seen one break.  I've seen one break the spur gear because the tech before me put the ARL in wrong  :roll:   The two ARL's I've seen broken where just piss poor quality (one was a JG, no surprise there) the other was a VFC (Still no surprise there).  If nothing else is broken, replace the ARL, and go to town.  I suggest cleaning out your gearbox grease wise while you are in there to double and tripple check that no metal dust got into the greases!