View Full Version : Leaking

08-03-2006, 04:04 PM
My pilot is leaking air out of the barrel. So I replaced the cup seal and the valve stem and the spring, thinking that would solve the problem. But nope it still leaks!! PLease help. Do I need to pu some oil on it??

08-03-2006, 05:18 PM
Put some oil on it. Didn't help:( :confused: :mad:

08-03-2006, 05:27 PM
Are you shooting LP? If so, try cranking the pressure up and letting it sit overnight pressureized.
If not, you might take a look at the cupseal again and make sure the face where it seats against the valve is clean & smooth. The last check would be of the valve itself, but be careful since it's easy to damage the valve breech or the o-rings during removal/installation. See the tutorial videos at Kingman's website if you're unfamiliar with the procedure.


I have heard of some people using aftermarket cupseals for problematic leaking.

08-03-2006, 05:31 PM
I'm not running low presure. I just but some oil on the cup seal. Does the valve pin flat side need to be facing up, down, left, right?? It's clean I think. Thanks Sandman

08-03-2006, 05:33 PM
no. Here's that cupseal, it's suppose to be of a softer material than the stock one for a better seal.

08-03-2006, 05:34 PM
PMing you...

08-03-2006, 06:34 PM
Thanks, but i still can't get it to stop

08-03-2006, 07:45 PM
its kinda normal for it to leak alil air out of the barrel

The Pink Panther
08-03-2006, 07:50 PM
no its not

08-03-2006, 08:09 PM
have you tried taking the valve out at all and seeing if the orings are still intact?

08-03-2006, 08:17 PM
it is for very little

08-03-2006, 08:22 PM
if your gun is setup right, there should be no air escaping through the valve when you aren't firing.

08-03-2006, 08:24 PM
didnt he say through the barrel

08-03-2006, 08:25 PM
well either way maybe i am wrong but i read off another thread and they said its ok for just a lil bit to leak

08-03-2006, 08:26 PM
air has to go through the valve before it can get to the barrel. Most people say it's leaking from the barrel because that is where it is going and that's where you hear it

08-03-2006, 08:29 PM
ok well sorry than..got false info

08-03-2006, 09:40 PM
hey, it's no biggie, i wasn't sure how spyders operated also at first.

08-03-2006, 09:43 PM
thanx for understanding

08-03-2006, 09:49 PM
It's a slow leak from the barrel. I've looked over every oring on the gun and there not damaged. I think i'm goin to have to buy some lapco cupseals

08-03-2006, 10:37 PM
yeah, it's the cupseal. Most times 9/10 when it leaks out of the barrel, it's the cupseal

08-03-2006, 10:45 PM
Thought of a few things, but my darn edit button won't work >.<

Make sure you cock the gun before you put air in. Sometimes the striker rests on the valvepin making it a bit of a problem ...

Also, make sure you have the star guide, or else your cupsel won't sit correctly.

08-04-2006, 07:17 AM
Well I just filled up my little practice tank. It's a 12 oz. and I went out and just dry fired it with air and no balls, and I only got about 200 shots out of it. It was a full fill. I'm getting tired of this gun!!! And i tried cocking it first. Only thing different was when I screwed it on, it shot alot of air through it for about 2 seconds and then finally stoped and there was the leak again. I'm goin to get rid of this gun. To aggrevating!

08-04-2006, 09:06 AM
Before you get a new gun, try getting a lapco cupseal. I have one on mine and i've never had a problem with it leaking.

Mech Warrior
08-04-2006, 09:15 AM
Have you got the little star guide on the cupseal?

08-04-2006, 09:51 AM
Yup. I'm goin to go do a secret that the chubbs told me. It shouold fix the problem.

08-04-2006, 10:28 AM
It didn't work. Now when I screw the air in, it's a fast leak. And I had it cocked before I aired it up andwhen I push forward on the cocking knob, with it still cocked,it stops leaking from the barrel and comes drom the trigger frame. I think I'm goin to call Kingman and return it.:(

08-04-2006, 11:19 AM
Make sure the valve body is in right.

Small hole faces the back of the marker.

That would also cause you issues.

08-04-2006, 11:26 AM
It's in there right. I checked both of them like 3 times. But my local feild said they could fix it. SO I'm just goin to forget about it.:D

08-05-2006, 03:13 PM
I got it fixed today. Just geuss what it was?? THE CUP SEAL!!!:confused: I changed that and it still leaked. But I take it up to the shop and do the same thing I did and, wala, it's fixed.

08-05-2006, 04:02 PM
Glad to hear it man. It still wouldn't hurt to pick up a lapco spare in the meantime, I mean they're only a couple o' bucks.

Mech Warrior
08-08-2006, 06:27 AM
Live and learn...

08-08-2006, 11:35 PM
i had this same problem but i heard it from the barrell and the feeder. all i did was oil all my orings and changed my cup seal and it stopped

08-09-2006, 09:32 AM
It was the cup seal. I think I'm goin to leave the va and all the inernals alone for a while because I don't need to clean them. I think that's what I did last time. I keep taking it apart and would oil the cup seal and then I geuss I messed it up.

08-10-2006, 05:37 PM
So you're going to keep it then?

08-10-2006, 06:44 PM
Ya, maybe. If I get offered the right price then it'll go :D

08-10-2006, 07:10 PM
-good, keep her.