CFX Chamber Lube

[LongIslandArcher]

On my Crosman NPSS, I need to add a drop of Silicone chamber oil into the compression chamber, and I can only do that when I break open the barrel, but how would I apply chamber oil to my CFX?

[longislandhunter]

Why do you need to add chamber oil  

Jeff

[CharlieDaTuna]

There should be no need to add any kind of lube into the compression chamber. That's a very good way to cause damage to the rotary breech seals.

[LongIslandArcher]

I was only wondering because the Crosman Nitro NPSS required a drop of silicone chamber lube every several hundred rounds.  Then I went to check Pyramyd Air for Gamo Oil and it says in the description to not use it in the chamber.  So, two different manufacturer's; two different answers.  On my CFX however, I had it converted to the Air Venturi Gas Ram, so I don't know if that requires chamber oil.  If it does, I guess the way to apply it would be down barrel with the breach closed and let the oil run down into the chamber.

[longislandhunter]

I don't own any gas ram guns but I still don't think they require chamber lube.   I could be wrong  but I've never seen any posts from any of the other members who have gas ram guns talking about adding chamber lube.  I'm sure members who own such guns will chime in and give you the benefit of their experience.....

Jeff

[RedFeather]

Some people do advocate chamber oil, sparingly. It is mainly pure silicone oil. Good source is a hobby shop that supports R/C cars where it is used for shocks. Also good stuff of the old leather sealed guns. The Gamo oil may be petroleum based. That's a big no no.

[airiscool]

Nothing in the paperwork that came with my Pyramyd Venturi Gas Ram says anything about using a lube. I assume the Nitro Gas Ram that Pyramyd has replaced it with is the same.

Maybe the Crosman piston seal is differant and needs occational lube, but I don't see how one drop in the chamber will do anything for the gas ram ?

Does the CFX book say to oil? If not I wouldn't. Especially since you heard not to from CDT who's probably done more Gamo tunes than anyone alive.

Paul.

[LongIslandArcher]

The book doesn't say to add a drop of chamber oil into the compression chamber, but the book also didn't say to swap out the spring piston with a gas piston either.  My Crosman NPSS says to add a drop of chamber oil into the compression chamber every few hundred rounds, which is why I'm asking whether or not the gas ram in my CFX now requires it also.

[RedFeather]

After asking some questions about the CFX, I am wondering if the chamber lube is such a good idea in this design. As Charlie has pointed out, contaminants can degrade the large rear o-ring. In a regular springer, the lube goes in through the port and sits on the top of the piston seal. When the gun is fired, it probably is evaporated a great deal but stays behind the front of the compression tube (what doesn't come out through the port). On the CFX design, the lube will be forced against the o-ring since there is no end on the compression tube. I should think that lubing the spring and molying the sides of the seal will give all the lubrication you need.

[LongIslandArcher]

My CFX no longer has a spring; it has the Air Venturi Gas Ram piston.  I've got a Tesla piston seal coming to me from Maccari (AirRifleHeadquarters.com) to replace the stock piston seal that originally came with the spring piston.

[airiscool]

As I said, there may be something differant about what material  Crosman uses for a  piston seal in a ram powered gun that requires additional  lube and it may have nothing to do with the  ram itself.

If the ram needs lube, it doesn't make sense to introduce that lube ahead of a piston seal that's designed to seperate the ram from where Crosman says the lube should go in when the ram could/would be better lubed by a drop placed into the reciever through the cocking lever slot. How would that drop placed in the chamber get to any parts of the ram to be affective

And if you have an Air Venturi, it doesn't require  any lube other than maybe a small dab of moly on the ram ends when first installed.

Since they say they are authorized to install them under Gamo warrentee, an e-mail or call to Pyramyd will probably get you an answer about if the Nitro piston is any differant than an Air Venturi as far as needing lube.

Paul.