Classic Valve Leaking Hard out the Reg back

[CatoRockwell]

I just purchased a classic valve and I've oiled everything well but Gas continually leaks out the back of the marker through the valve velocity adjust. If I turn it down enough that it stops leaking it doesn't fire period. It also will not fire when it's leaking and the velocity is turned up. Anyone know what I should do?

btw, it has the standard lvl 7 bolt installed.

Reg spring is in the right way. If I turn it up all the way it seems to be releasing full input pressure 850 out the back.

I already tried adding shims to the regulator piston I put 3 in and it showed no improvement. I'm really stuck on this one.

[Bigwooly1013]

I just purchased a classic valve and I've oiled everything well but Gas continually leaks out the back of the marker through the valve velocity adjust. If I turn it down enough that it stops leaking it doesn't fire period. It also will not fire when it's leaking and the velocity is turned up. Anyone know what I should do?

btw, it has the standard lvl 7 bolt installed.

Reg spring is in the right way. If I turn it up all the way it seems to be releasing full input pressure 850 out the back.

I already tried adding shims to the regulator piston I put 3 in and it showed no improvement. I'm really stuck on this one.

the reply in post 2 really worked well for me.

http://www.automags.org/forums/showthread.php?t=246743

If post 2 doesn't work post 3 might be your only option.

Ando posted pictures of the disassembly somewhere but i can't find the thread now

[Ando]

Ck the BE forums. Just posted on the thread you opened over there.

[DevilMan]

I can't tell ya what the fix is, but I can tell you to let me know if it don't work out... I'll get the fix figured out...

Aight??

I'll also look around and see what I can find about fixing it... as far as I know the o ring that's on the reg piston is the only thing back there to change out... I'll see if I can find the answer as well...

DM

[xero28]

Yeah, like DM said, check that the regulator piston O-ring is in good shape. It sounds like it might not be there at all.

[Ando]

What I posted on BE.
I'm making a vid tonight at work on how to disassemble it. I'll have it uploaded tomorrow.

If your strap for cash you can fix it. Get a allen key (7/32) and open up the brass piston. First thing that will come out is a spring, a metal plate and a rubber seal. That seal is your problem. If you look closely you'll see circular groves in the center of it (can also feel it). Just turn that seal around so the groves are against the metal plate and not against the front of the piston then reassemble. Install the allen set screw all the way down tight and reassemble the marker. You should be rocking.


That's a temp fix till you get a new one. Get with Tuna and buy one cause once it starts leaking again. That piston is Tango Uniform. I wouldn't replace it with the new one till that one starts leaking again. How long will it last is UNK

EDIT: Found a pic. This piston is from a RT valve but the internals are the same for both. The rubber seal is sec to last on the right.

[CatoRockwell]

So I did take the piston apart and did just that, now it is leaking out the front have of the valve hard and is no longer leaking out the back of the reg. What do I do now?

[xero28]

So I did take the piston apart and did just that, now it is leaking out the front have of the valve hard and is no longer leaking out the back of the reg. What do I do now?

Do you mean it's leaking down the barrel? You can check this by pulling and holding the trigger. If the leak stops then it's probably something in your power tube, most likely the power tube o-ring.

Here's the link to part 1 of 10 of Tom Kaye's videos on the mag. I think it's around part 6 or 7 that he gets into troubleshooting and teching the gun.

http://www.youtube.com/watch?v=vehPc7vuK20

[athomas]

Using a level 7 bolt with a red spring will result in a higher operating pressure in the chamber. A higher pressure will probably exceed the pressure release of the regulator piston assembly so the pressure will never get high enough to push the bolt.

I see you have the problem fixed by altering the reg piston assembly. If the problem persists, try the valve with a standard level 7 bolt spring.

As for the leak out the front, you may need to replace the powertube oring and/or use a shorter spacer. This is of course, if the problem is in the powertube and will stop when you hold the trigger in? If the leak doesn't stop when you hold the trigger, then the problem is in the on-off area.

[CatoRockwell]

The problem does not go away when I pull the trigger

[DevilMan]

Cato, did you put an oring in the powertube???

DM



The O ring shown here, between the BLUE BUMPER and the L7 SPACER is what that valve needed.

Did you pop one in there???

[Ando]

The video unfortunately won't be uploaded till tomorrow but I'm happy you were able to get it open.

Everyone covered the basics for fixing the other leak so good luck bro.

[CatoRockwell]

yes there is an oring in the power tube

[Ando]

Is everything on the valve stock? If not make it so and start adding what ever aftermarket parts you had on it till it starts venting. Then try fixing that part.

[DevilMan]

Ando, when I had it, I took it apart and the best I could tell/saw/know it was all stock. I only knew that it was missing the powertube o ring. I know I took the on/off out as well and cleaned everything. I know there has been no oil in it since I cleaned it, so I know it could use some though, I'm not sure that it'd fix the leak.

Cato, pull it apart and check it against that pic I posted, and see if all of the parts are there and are in the right places. I can't imagine that I would have missed something major, but I very well could have. I had no air to check anything with.

Let me know what pans out man... I feel bad that you got that from me and it's giving you fits...

DM

Only other thing is I'm thinking that one has the .235 spacer in it. Try a different bolt if you have one handy, or swap out the spacer to a smaller one, as that's the top of the size range for those I think.

I also often had one of the small teflon/white washers that I put in the powertube under the o-ring...