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Airwolf CDT question O-Ring size

April 16 2017 at 11:25 AM

bigberk1979  (Login bigberk1979)

My fill probe was leaking so I took it apart and saw that the small O-ring on the tiny piston broke.
Does anyone happen to know the type and size?

Also what's the oring size on the bolt?

This message has been edited by bigberk1979 on Apr 16, 2017 4:52 PM

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(Login garczar)

Re: Airwolf CDT question

April 16 2017, 2:04 PM 

"Small print on the tiny piston'??

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(Login peterdulux)

Re: Airwolf CDT question

April 16 2017, 3:28 PM 

I have a Air Ranger with the same fill port that leaks on and off. What small print?

Pic please. I used a generic o ring from an o ring kit that just happened to fit. Don't know the size, sorry.

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(Login Diamondback)

Found this great list of Daystate Orings

April 16 2017, 6:04 PM 


Taken from the above referenced post:

"Please note that DayState uses both Imperial or Metric O-rings. For Imperial O-rings, either the British Standard dash number (BS-xxxx) or American Standard dash number (AS568-xxxx) will work.

Bolt O-rings (aka Pellet Probe): Air Ranger, Air Wolf, MK4, Huntsman, Regal – FAC:
.177: -003 Buna-N A90
.20: -004 Buna-N A90
.22: -004 Buna-N A90
.25: -005 Buna-N A90

Bolt O-rings (aka Pellet Probe): Air Ranger, Air Wolf, MK4, Huntsman, Regal – 12 ft/lbs:
.177: -003 Buna-N A70
.20: -004 Buna-N A70
.22: -004 Buna-N A70
.25: -005 Buna-N A70

Piston O-rings: (AR, AW, MK4, HM RGL):
–006 Urethane A90 "


Videos of leak & repair:
Part 1 -https://www.youtube.com/watch?v=iEDBV-0VxZs
Part 2 -https://www.youtube.com/watch?v=41l7waPjEOY
Part 3 -https://www.youtube.com/watch?v=KFaOwv2BiXE (This vid states a size 006 oring in check valve)
Part 4 -https://www.youtube.com/watch?v=KDlon76NJ5Q (Dowdy Seal replacement)
Part 5 -https://www.youtube.com/watch?v=fPz6eOcG6kU

fixed a similar leak in my FX Typhoon / Logun Solo. I used a size 006 oring to fix mine. Brother Tom used size 005 in his. Worked for us as long as the size is close enough.

Here is a link with some pics (not mine) showing the cone shaped part in an FX:

Tom's post:

This message has been edited by Diamondback on Apr 16, 2017 7:02 PM

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(Login D-RIG)

your o-ring for fill probe should be a Buna-006 A70

April 17 2017, 1:45 PM 

as for the bolt you need to tell us what callleber please

.117 Buna-N 003
.20 Buna-N 004
.22 Buna-N 004
.25 Buna-N 005

I would use the A-90s if you can get them over the bolt probe
but the 70 durometer work well also . Good luck .

This message has been edited by D-RIG on Apr 17, 2017 1:46 PM

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