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Old 11-24-2012, 01:23 PM   #8721 (permalink)
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Maybe you guys could help me with this. I get a cocking chuff but cant get the piston to open the dump chamber. I replaced the piston and reg orings with my kit and found the biggest oring on the rear plunger was sticking. I swapped it for the stock soft one and now the piston moves easily but not via air pressure. I took the trigger assembly off and ensured that the hammer is contacting the clippard stem and even pressed it in with a screw driver but still couldn't get any action. It's getting air but I'm not sure if it's enough to move the piston. I'm thinking I should deactivate the reg next which would isolate the problem to the clippard valve. Thoughts?
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Old 11-24-2012, 03:01 PM   #8722 (permalink)
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I think you're on the right track. Have you tried messing with the internal reg? Turn it up/down and see if it helps first, if you already haven't. Then try deactivating it (take middle o-ring off) and use an inline reg (with a gauge!) and see if it'll work at 275-290psi (don't go above 300psi, 290 should be enough to actuate the main piston in any case). If that doesn't work I can't help but imagine the problem lies in the actuating valve.

Have you checked to make sure the main piston's front and two middle o-rings aren't also sticking?

BTW, I've come to the conclusion that, although I don't love it, the chuff you get when cocking the gun seems to be "normal." All three of my thumpers do it now (although strangely one of them didn't ever do it until I put a couple hundred rounds through here and took it apart to clean/replace o-rings...).

Another Thumper mystery
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Old 11-24-2012, 03:57 PM   #8723 (permalink)
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Sorry for the dp guys, but I was wondering, will an RTR garg grip frame fit on a Thumper? I'm wondering if the "winged" part of it (the foremost top) will make it incomparable with the thumper's trigger assembly, like the CCM 86* frames...



I have a feeling it won't fit, and in this case I'll have to go the JCURT 90* frame, which isn't such a bad thing (I've just never used a 90* frame on a pump or sc marker and from my experience using them on electro guns, namely my rat jr, I kinda feel like the advantage they impart on high volume shooters might be lost on a pump gun). Hopefully I'll be pleasantly surprise in terms of snap shooting using the 90* frame...
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Old 11-24-2012, 04:23 PM   #8724 (permalink)
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Quote:
Originally Posted by toymachine View Post
Sorry for the dp guys, but I was wondering, will an RTR garg grip frame fit on a Thumper? I'm wondering if the "winged" part of it (the foremost top) will make it incomparable with the thumper's trigger assembly, like the CCM 86* frames...

http://remembertheronin.com/images/w...rame_Black.png

I have a feeling it won't fit, and in this case I'll have to go the JCURT 90* frame, which isn't such a bad thing (I've just never used a 90* frame on a pump or sc marker and from my experience using them on electro guns, namely my rat jr, I kinda feel like the advantage they impart on high volume shooters might be lost on a pump gun). Hopefully I'll be pleasantly surprise in terms of snap shooting using the 90* frame...
I still had my Garg when I had my Thumper in my possession(still getting teched; argg), but I never tried switching the frame cause I thought that it would fit, so why bother. I'm guessing it will.
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Old 11-24-2012, 07:05 PM   #8725 (permalink)
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Old 11-24-2012, 07:34 PM   #8726 (permalink)
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Hmm... the CCM phantom 86 frames don't fit?
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Old 11-24-2012, 07:39 PM   #8727 (permalink)
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Nope

I believe lilshank tried and no go. The area within the yellow square is where the issue was for the 86* iirc, so wondering if it would be the same issue for the rtr frame:



Lilshank?

Last edited by toymachine; 11-24-2012 at 07:47 PM.
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Old 11-25-2012, 12:03 AM   #8728 (permalink)
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Yay, I can be somewhat on cue for something

No, CCM frames do not fit for the reason that you stated, the "wings" end up covering the trigger, unfortunately. I'd imagine that, if the RTR are of the same design, they will not fit either. A standard Phantom 45 grip or one of jcurt's 90 grips do however fit.

And as far as having a set screw on the front of the piston cap, go for it, the latest editions have the screw in the front to hold it to the main piston body:

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Old 11-25-2012, 02:04 AM   #8729 (permalink)
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Quote:
Originally Posted by LilShank View Post
Yay, I can be somewhat on cue for something

And as far as having a set screw on the front of the piston cap, go for it, the latest editions have the screw in the front to hold it to the main piston body:

http://www.mcarterbrown.com/gallery/...409_172136.jpg
That looks just like what I did. And it works great! as long as you put thread tape on the piston stem, or it will leak. I am going to get mine put back together sunday and shoot some paint threw it. New piston installed, new o-rings installed. Just got to get out and shoot it.
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Old 11-25-2012, 12:40 PM   #8730 (permalink)
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Quote:
Originally Posted by LilShank View Post
No, CCM frames do not fit for the reason that you stated, the "wings" end up covering the trigger, unfortunately. I'd imagine that, if the RTR are of the same design, they will not fit either. A standard Phantom 45 grip or one of jcurt's 90 grips do however fit.


Well, there goes that idea...

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