Saw this great post by ArcticFlame Has anyone rebuilt a CEJN coupler ? Mainly with just replacing the orings My issue is that at low temps -10C my fitting started to leak. https://classiccampstoves.com/posts/166083
Intrigued, I took a spare coupling apart tonight. Easy job to do. My regular laptop has announced a 'SMART event' to warn me that the hard drive might fail at any moment, so its in for repair and I can't upload the photos I took of the dismantling and reassembly of the coupling on this computer, which is (almost) a Commodore/Atari era PC on Windows 98. Later in the week for the photos maybe, but the O-rings (2) match a small blue one used in a Primus Omnifuel on the control valve spindle at the burner. Glad I found that out, it means the CEJN couplings I have are user serviceable. Pictures will tell the tale, but a spring clip at the flexi-hose end of the coupling snicks off, a male coupling is then pushed in and the sleeve holding three sprung-loaded steel detent balls slips off. The working parts can then be removed. Of the two, same-size O-rings, one makes the seal when the male coupling is connected up and the other makes the seal when it's removed, since a CEJN female coupling is automatically sealed shut when male and female are uncoupled. John
thanks John I did manage to get mine apart but have had some issues finding the orings to replace them. Since I'm not a o-ring guru... I wasn't sure where I could find singles of the orings with out having to purchase a over price service kit for a Primus or Optimus stove. As well looking around what type of oring would this be ? http://www.ftir.com/html/o-ring_types.html Viton: Viton (fluorocarbon) Kalrez® Perfluoroelastomer: Chemraz® Teflon: Teflon-Encapsulated Viton: Teflon-Encapsulated Silicone: Silicone: FDA-Compliant Buna-N:
I did find a Oring that matches up in my automotive set. Only problem is I have no idea what type it is. So I found a old pill container and dropped some orings into it. And let them sit for a couple days to see how they handle white gas. The size that matched up was 1/8 I/D 1/4 O/D 1/16 Section Not sure if any of the primus or Optimus rebuild kits list any size specs
I had no luck finding anything at a paintball place. My CEJN fitting didn't have the one washer listed in the first post pic. But using the orings I listed above it works great. I did have a problem and couldn't match up the Oring that seals the fitting to the pump housing. R-03 to small (I/D 1/4 OD 3/8 and R-04 to large (ID 5/16 OD7/16 And she still works
Got the computer working and uploaded the photos, which I've posted together with an explanation here CEJN fitting strip-down John
