FX FX Wildcat MK3 leak (cannot be filled anymore)

[hgg2k]

Sanity Check.

First of all I think that this FX dealer sold me a used pair or valve parts for two reasons.
First because they obviously have marks and dents and secondly is because when I first
asked him for these parts, he told me that they will be available at the end of the month.
But after two days and when I placed the order, he told me that they are available and
that I can collect them.

But after seeing these parts I think I was installing the valve seat in the wrong way.
Have a look at the following two installation orientations:





Orientation A is how I installed the valve, is how I found it installed in the airgun and how I saw it
be installed in the Ernest Rowe Masterclass video for the Wildcat.

But if you take a look at orientation B, you will see that the seat valve has a circular marking at its
center which coincides with the diameter of the Delrin and if these two parts were used, then this
inner mark makes sense.

Either way, when I mate the two parts in orientation B, I feel that I have a more secure seal.

 

[RoosterCogburn]

Sanity Check.

First of all I think that this FX dealer sold me a used pair or valve parts for two reasons.
First because they obviously have marks and dents and secondly is because when I first
asked him for these parts, he told me that they will be available at the end of the month.
But after two days and when I placed the order, he told me that they are available and
that I can collect them.

But after seeing these parts I think I was installing the valve seat in the wrong way.
Have a look at the following two installation orientations:





Orientation A is how I installed the valve, is how I found it installed in the airgun and how I saw it
be installed in the Ernest Rowe Masterclass video for the Wildcat.

But if you take a look at orientation B, you will see that the seat valve has a circular marking at its
center which coincides with the diameter of the Delrin and if these two parts were used, then this
inner mark makes sense.

Either way, when I mate the two parts in orientation B, I feel that I have a more secure seal.

i thought so. I honestly felt stupid for a minute, like i lost my mind. Try it in B

 

[Trucker3573]

Any update? Did you get this remedied?

 

[hgg2k]

Any update? Did you get this remedied?

The local FX shop sent me a valve with a completely wrong size. The head was bigger and wouldn't
fit in the valve housing hole. I thought I was doing something wrong. Even the seat had a smaller hole.
They were obviously for a different model...
Anyway, I've returned the items for a refund and now I am waiting for the new parts from Europe.
Everywhere I asked, orientation (A) is the correct one, so this is what I am going to try first.

 

[hgg2k]

Ok, this is depressing.
I received today the new valve seat and pin and installed them.
Same exact thing! Air is gushing out the barrel (and the breech when cocked).
Its like there is no sealing at all.

The only thing I can imagine is a faulty main block.
Not sure what to do next.

 

[hgg2k]

Finally!

The PCP Gods took pity on me and the bloody thing was filled up with air.
While using the compressor, it was leaking and leaking and leaking air from the barrel
and at some point it stopped and I was able to fill it up. It remains to see if it holds the
air or it will have a slow leak again.

To me this valve design looks bad.
Its a metal to Delrin seal and the metal seat its not even properly polished.
The problem is that this is a cone to circular edge seal. The cone is on the metal seat
and the circular edge is on the Derlin cylinder of the pin. A double edge seal.

If the orthogonality between the metal cone and the Delrin cylinder is even slightly off,
then the conic section becomes an ellipse and you will be trying to seal an ellipse with a circle...
Very bad design in my opinion. The tolerances have to be perfect. Not only that, but
even the slightest damage on the Delrin edge will also cause the seal to leak.

I would not be surprised at all if it starts developing a slow leak again.
At least it is back.

 

[hgg2k]

At least I know that this FX Clown will make many kids happy by filling up their party balloons...