Wildcat Leaking

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Maybe try the old trick to put a layer of Teflon tape behind the 2 larger o-rings? That worked on my Marauder.
If it still leaks, it could be the little o-ring inside the reg. But I'm not touching that one :) If that happens to me, I'll be buying a HUMA.. I suppose I am looking for any excuse to get one. However my FX reg is giving me an ES of 9, so I'm keeping it until it fails.

Can't think of anything else.

Crusher
 
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To my knowledge if it is leaking through the small hole in the air tube than the only thing it could be is one of those reg o rings. Those o rings are the only thing keeping the air in the tube from venting to the atmosphere...

Maybe there is a small burr in your tube that nicked one of the o rings (most likely on the silver adapter) when you re-assembled it?

I'd bet that it is the forward most o ring that got nicked when sliding past that hole in the tube, You can touch it with some fine grit sand paper to de burr it before putting it back together. 
 
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Well, at least we wont have to be sending these guns to AoA anymore once the FX factory is set up in NC. For us on the East Coast that will translate into a lot less time without our guns and a whole lot less on shipping charges.

​But in Matt's case ... those two O-rings on the outside of the regulator ARE the only place where it could be losing air if it is actually leaking from the vent hole. Could you have a small leak in another spot???
 
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Hi Matt, 
Tweeter is correct in telling you that your problem with air leaking out of the breath hole in your air tube is caused by the inside edge of the breath hole itself. When a hole is drilled into a tube it can leave a burr on the inside edge that can nick the rear most o-ring on the regulator body, which causes it to leak. I had a similar problem with my Wildcat leaking air out of the breath hole, but much worse...when I got my gun it would not hold air overnight without leaking out. So rather than send it to AOA I ordered the o-rings to reseal it myself. When I took it apart I could see that on the top of the rear o-ring, it looked like something took a tiny half-moon shaped bite out of the top of it! So I took a toothpick and poked it through the breath hole to see if it was clear and lo and behold a tiny half-moon shaped piece of rubber fell out!

When I checked the hole there was no burrs, but I sanded around the inside edge of the hole anyway to make sure it was smooth. And yet every time I put a new o-ring on the rear of the regulator body and inserted it, the breath hole in the air tube it would take a bite out of the rear o-ring. I deduced that the hole had been drilled at an angle instead of perpendicular which resulted in my air tube being like a pickle slicer...no matter how much I tried to sand it smooth it would slice off a piece of the rear o-ring every time, and everytime it did there would be a tiny piece of rubber stuck in the breath hole!

So I eventually replaced the air tube with a brand new one and have never had a problem with it since then. And I want you to know that I have experimented extensively with various regulators in my Wildcat, which means I have had them in and out of my new air tube scores of times and still not one problem with leaks at the breath hole anymore. So you may solve your problem by sanding the inside of the breath hole smooth with 600-800 wet/dry sandpaper, or you may end up replacing your air tube like I had to do.

All the best, Chuck
 
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Most likely is the piston HP or LP orings.

you need to make 2 critical measurements before removing the reg piston, you will need to heat to burn the thread sealer and you will need to protect the brass retainer from the vice grip—it’s not going to come out that’s easily. If fact the FX reg is the hardest one to work on. Continue at your own risk!

1: piston brass retainer, this retainer limit how far the piston open from the stationary metal seat. If not set properly it will affect the refresh rate and travel of the piston. 

2. The hex nut that has a delrine insert, is threaded on the piston, this nut determine how much compression on the spring washers— more compression the higher the reg pressure will be.

to test Reg out put pressure install a gauge on the left side of action by removing the brass plug, FX OEM gauge will fit. Pressure should be around 140-150b, to adjust pressure install a hex Allen on end of piston to prevent the piston from rotating while you are turning the nut.


Vary time consuming task but rewarding.

sounds easy right—-not !

for experience guys only 😮

 
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