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Author Topic: What's going on here?!?!  (Read 3055 times)

Offline Ares

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What's going on here?!?!
« on: June 05, 2006, 10:37:02 PM »
I use a Marui M4. stock everything escept for the 120 spring.

here's my problem. I have completely broken 2 gearboxes already, it only takes a few thousand rounds to deatroy it. the cracks start after maybe 6 or 7 hundred.

what's going on? i was using a 9.6volt 1800mah batt.. is it too powerful?

is the fact that nothing else is upgraded the problem?
« Last Edit: December 31, 1969, 05:00:00 PM by Ares »
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Offline Popapalooza

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« Reply #1 on: June 05, 2006, 10:39:47 PM »
What kind of gearboxs are they, maybe you should by a reinforced gearbox http://www.airsoftsmith.com/store/product_info.php?cPath=39_47&products_id=619
« Last Edit: December 31, 1969, 05:00:00 PM by Popapalooza »
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Offline Vince

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« Reply #2 on: June 05, 2006, 10:40:35 PM »
I'll have a Classic Army gearbox shell I can sell you in a second here - come by Scottsdale JT sometime after tomorrow. They're reinforced and tougher.
« Last Edit: December 31, 1969, 05:00:00 PM by Vince »
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Offline gixser13

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« Reply #3 on: June 05, 2006, 10:41:09 PM »
Heavy dry fire will do it every time
« Last Edit: December 31, 1969, 05:00:00 PM by gixser13 »
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Offline Ares

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« Reply #4 on: June 05, 2006, 10:42:57 PM »
i make great efforts to avoid dry fire. it seldom occurs. my fire is most all while firing rounds. That's why i'm so baffled by 2 droken boxes
« Last Edit: December 31, 1969, 05:00:00 PM by Ares »
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Offline warlock

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« Reply #5 on: June 05, 2006, 11:20:56 PM »
To be honest, from having been through a few gearboxes, a lot of small things can add up and break an otherwise great gearbox.

Get a Systema replacement gearbox, **GET IT SHIMMED BY AN AIRSMITH**, and not worry about that problem happening again.
« Last Edit: December 31, 1969, 05:00:00 PM by warlock »
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Offline Ares

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« Reply #6 on: June 05, 2006, 11:25:30 PM »
get it what by a who?
« Last Edit: December 31, 1969, 05:00:00 PM by Ares »
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Offline Popapalooza

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« Reply #7 on: June 05, 2006, 11:27:37 PM »
get it shimmed by an airsmith(Jeremiah is relly good). Have you opened up a gearbox before?
« Last Edit: December 31, 1969, 05:00:00 PM by Popapalooza »
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Offline Comrade Commissar

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« Reply #8 on: June 05, 2006, 11:29:36 PM »
shimming would (i think) be the gear alignment , and an airsmith would be some one who works on airsoft guns, and knows what they are doing.
« Last Edit: December 31, 1969, 05:00:00 PM by Comrade Commissar »
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Offline Ares

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« Reply #9 on: June 05, 2006, 11:29:54 PM »
what is shimmed? and yes i have opened a gearbox before, but i dont know how to completely swap internals.. i can do pistons, springs, gears, the big stuff, but things like the selector plate, trigger assembly, i just dont trust myself with the entire swap
« Last Edit: December 31, 1969, 05:00:00 PM by Ares »
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Offline Popapalooza

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« Reply #10 on: June 05, 2006, 11:32:01 PM »
Quote from: "bassick1"
what is shimmed? and yes i have opened a gearbox before, but i dont know how to completely swap internals.. i can do pistons, springs, gears, the big stuff, but things like the selector plate, trigger assembly, i just dont trust myself with the entire swap


I'm not trying to sound mean but do you know what a shim is?
« Last Edit: December 31, 1969, 05:00:00 PM by Popapalooza »
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Offline Ares

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« Reply #11 on: June 05, 2006, 11:33:22 PM »
i know what a shim is. what i dont know is how to apply shimming to an airsoft gun.
« Last Edit: December 31, 1969, 05:00:00 PM by Ares »
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Offline warlock

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« Reply #12 on: June 05, 2006, 11:34:10 PM »
Quote from: "Popapalooza"
get it shimmed by an airsmith(Jeremiah is relly good)


I concur. Jeremiah is awesome from everything I hear, and it is from people who run their weapons hard who have no reason to BS me on the subject.

If you were down in Tucson, I'd recommend Pryde.

Reason being, I ruined a brand new out of the box Systema replacement gearbox only for the simple reason I did not follow their advice and have it installed by an experienced airsoft technician (airsmith, in my vocabulary...) because from what I have read, they all require re-shimming to be absolutely proper. Pryde resurrected said dead gearbox for me, and it is what is currently running my formerly-cursed CA M15A4.

Shimming is a process of putting little metal spacers on the various ball bearings in the gearbox to make sure that 1) the gears don't float around and bump into each other (taking teeth off the gears in the process...) and 2) to make sure they are centered on the piston so they don't strip it out. This is why it requires an airsmith. The extra 40 or so bucks you spend to have an airsmith spend a few minutes of their time adjusting it to be perfectly right, is more than worth it, so you don't ruin a 200-dollar gearbox 50 rounds in to using it.
« Last Edit: December 31, 1969, 05:00:00 PM by warlock »
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Offline Ares

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« Reply #13 on: June 05, 2006, 11:37:37 PM »
ok. I have some of those shims (ive been calling them washers) under the gears. but they need to be arragned so that the gear spacing is perfect and it differs from box to box? (as i understand it)
« Last Edit: December 31, 1969, 05:00:00 PM by Ares »
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Offline warlock

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« Reply #14 on: June 05, 2006, 11:39:21 PM »
Perfectly correct. They are washers, but for their purposes in airsoft we call them shims. :)

And perfect gear spacing is essential to long-lasting gearboxes.
« Last Edit: December 31, 1969, 05:00:00 PM by warlock »
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