EVOL Use only Ultimox Teflon Grease

[American Air Arms]

We always recommend you have your gun serviced by an authorized repair center. Your dealer, or Precision Airgun Distribution in the US. If you are uncomfortable or unsure of how to proceed we ask you contact your dealer before you begin; they are there to help!

The EVOL reservoir is made of Titanium (Ti). Ti is a fantastic material that gives the the best combination of strength, size, and weight. Because Ti allows for a thinner tube wall thickness, the threads for the receiver and end cap are necessarily fine (28 tpi) with very close tolerances. Proper procedures are required when replacing tube o-rings.

1) Use only Ultimox or Krytox Teflon grease. We use Ultimox 226 at the factory. Never use any silicone based product. Silicone based products offer zero lubricity, Ultimox on the other hand is extremely low friction, temperature stable, and has no solvents that can evaporate out. Ultimox will stay put forever.

2) Clean all threads with acetone to remove any old grease and visually inspect for debris that may jam up the threads. Microfiber towels work great for cleaning.

3) Coat the o-rings and threads with Ultimox. It does not require a lot of grease but make sure you have a complete coating.

4) Use extreme care not to cross thread on reassembly. It is recommended that you trial fit greased parts without the o-ring to make sure they thread smoothly. If they feel gritty, clean and inspect again. Once confident install the o-ring and final assemble.




Ultimox is available from Amazon and EBAY. Use it on all o-rings in the EVOL.

 

[ctshooter]

Tom - your timing on this is uncanny. I had an o-ring go on my EVOL after a bunch of retuning and was going to reach out and ask what lube to use. Appreciate you and AAA that much for more putting the info out there.

 

[Woogie_man]

Yeah don't use silicone!!!! Trust me it will cause a problem. I am dealing with this issue right now.

Learn from my mistake guys!!! Hoping it doesn't have to go back to Tom for repair due to my mess up.

 

[Eric Brewer]

Yeah don't use silicone!!!! Trust me it will cause a problem. I am dealing with this issue right now.

Learn from my mistake guys!!! Hoping it doesn't have to go back to Tom for repair due to my mess up.

What is the problem you are having with silicone? Please explain your issues so we can understand why not to use silicone.

 

[American Air Arms]

What is the problem you are having with silicone? Please explain your issues so we can understand why not to use silicone.

Close tolerance parts will gall and potentially seize with silicone.

 

[Woogie_man]

What Tom said..

I used the wrong lubricant on the rings and it got on the threads. It was my own stupid mistake.

 

[Madeintheuk]

What are the differences between krytox and ultimox? I have krytox at home.

 

[American Air Arms]

What are the differences between krytox and ultimox? I have krytox at home.

Essentially the same. Krytox is a Dupont product which makes it more expensive. Ultimox is generic. The 226 has a rust prohibitor which is excellent for steel parts.

There are oil versions of these products but I prefer the grease because it stays where you put it.

 

[Woogie_man]

I am going to be sending my cylinder back to Tom to have him look at it. Tom please let people know what happened and how to avoid doing that I did. If my mistake can help others by all means let people know.

 

[Madeintheuk]

My only question for @American Air Arms is, for my whole pcp career, it’s been drilled into my head to use silicone ONLY on my PCPs due to its high flash point. Teflon has a very low flash point, so it goes to say if it’s put under the extreme pressures of a pcp shot cycle, it could detonate. Is there some places we should NOT use this lubricant? Or are you confident we will not have problems.

P.s. this is from my lack of knowledge of lubricants in general, and all from what I’ve learned from others I believe know more than I about its uses.

 

[Peskådot671]

Thanks Tom. Good info to know. I'll make sure to add a jar to my next Amazon order.

 

[Woogie_man]

Thanks Tom. Good info to know. I'll make sure to add a jar to my next Amazon order.

Agreed I have some in my cart now and will have some ordered the next time I do anything through Amazon.

Are we good to use the Ultimox on all the seals and throughout the rifle? Sorry to have caused such an issue, but kind of glad I am not the only one learning either.

 

[American Air Arms]

Yes everywhere there are rubber seals.
Keep out off the hammer bore

 

[Woogie_man]

So we cant make spitballs out of the pellets when we are shooting!!! Wont that increase the speed of the pellets?

That is good to know Tom. I will get the cylinder sent out your way tomorrow. Let us know what the issue was and what the damage is.

Thanks again for the help!

 

[American Air Arms]

My only question for @American Air Arms is, for my whole pcp career, it’s been drilled into my head to use silicone ONLY on my PCPs due to its high flash point. Teflon has a very low flash point, so it goes to say if it’s put under the extreme pressures of a pcp shot cycle, it could detonate. Is there some places we should NOT use this lubricant? Or are you confident we will not have problems.

P.s. this is from my lack of knowledge of lubricants in general, and all from what I’ve learned from others I believe know more than I about its uses.

While I'm not a Chemical Engineer although I did research the suitability of Krytox and Ultimox for suitability for PCPs four or five years ago when the same concerns were voiced on the GTA. Bottom line, these products are rated for high oxygen environments.

My understanding is there is not a hydrocarbon base to these products. The Hydrocarbon base of conventional lubricants contain the volatile compounds that are prone to ignition under pressure in the presence of oxygen. Teflon itself is not considered flammable although everything will burn at some point.

If we have a Chemical Engineer in the house who can shed more light on the subject please do.

https://www.krytox.com/en/-/media/files/krytox/krytox-oxygen-applications.pdf?rev=ae5851e20fc24688971a13d9cf549e33

 

[Madeintheuk]

While I'm not a Chemical Engineer although I did research the suitability of Krytox and Ultimox for suitability for PCPs four or five years ago when the same concerns were voiced on the GTA. Bottom line these product are rated for high oxygen environments.

My understanding is there is not a hydrocarbon base to these products. The Hydrocarbon base of conventional lubricants contain the volatile compounds that are prone to ignition under pressure in the presence of oxygen. The teflon itself is not considered flammable although everything will burn at some point.

If we have a Chemical Engineer in the house who can shed more light on the subject please do.

https://www.krytox.com/en/-/media/files/krytox/krytox-oxygen-applications.pdf?rev=ae5851e20fc24688971a13d9cf549e33

The only reason I brought this out is because there’s been a thread on AGN going for the past few months about a Leshiy 2 that the air tank exploded while the gentleman was shooting his gun. He was unharmed thank god, but of course the discussion started taking the form of finger pointing at many things. Manufacturer defects, design of the tube, and lubricants used were a few of the ideas.
People much smarter than me started getting into flash points of lubricants, and detonation under pressure and so forth. The reading gets complicated for an average guy like me, so I could have missed something in the thread, but there was a consensus on silicone having a super high flash point and other lubricants not being suitable. While ultimox wasn’t specifically brought up, I wanted to make sure form you, the manufacturer, that I wasn’t putting it somewhere it didn’t belong.
Thanks for all the info you’re giving us on our guns, and how to properly take care of them. Another reason I’m happy to be an evol owner.

 

[wolfmangreg]

Agree with the others, great information here. This kind of interaction with the customer base really sets AAA apart from the competition!

Definitely learned something, had always operated under the "not silicone + HPA = bad things" paradigm (pun absolutely intended- sorry, have graduated from dad jokes to grandpa jokes).

 

[Woogie_man]

I have some of the Ultimox coming and should have it when I get the air cylinder back.

Tom if there is any damage or anything post pictures to let people see what happens. Hope there isn't any, but heck this is a learning experience.

 

[American Air Arms]

Will Do!

 

[ctshooter]

I was concerned as I had used silicone on the front o-ring about a week back. Got the Ultimox and was able to remove the front air tube cap, clean it up and lube it with the right stuff. Glad nothing had seized up on me. Phew!