200A and 202 reproduction
frames back
in stock.

Majicwrench

Since the old post got the PB treatment, thought I would post more pictures
IMG_2926.JPG
Here I am knocking the plug out of a thermos pump. That is a 3/4" wrench, or you can just hold it in your hand. Takes a few good wacks with a hammer on extension and plug will come out.
IMG_2924.JPG
 Here is plug out. Has the "hidden 4th" oring that often leaks.    You can see the NRV, we are gonna stick it in the hole. THe poppet has already been removed, just cut it with some wire cutters. You  may have to enlarge the hole just a tad for the smooth shaft of the NRV to fit. A rat tail file works, or a chainsaw file.
IMG_2927.JPG

  Here is plug in vise, I am screwing NRV into plug. You can see  some red locktite. Tap on cresent wrench and NRV and turn in slowly, it will sorta cut it's own threads. It goes in slowly.

IMG_2925.JPG

Here NRV is in plug, with new oring. I have cleaned and smoothed the pump tube where plug goes in. Oring is Felpro #411 w 3/32, ID 9/16, OD 3/4.  I didn't have the next size down, bet it would work fine too.

IMG_2942.JPG

Here is how you test your work. Slip balloon onto pump, and pump it up a bit, see if it holds. 

Keith
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Sam McCord
Keith, thanks for reposting this. It works great and were it not for this technique and big assist from you my Ted Williams 3 burner would not be running today.

Sam
Doug

Why is there never enough time to do it right but always enough time to do it over?
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Scrubjay
Hey, you can't show that last image here--THIS IS A FAMILY SITE!  Sorry, I just couldn't resist...

Actually I had a real question: why are you replacing the o-ring; wouldn't it be better to use some JB-Weld and just do a permanent fix of that goofy "super-secret-o-ring"?  Am I missing something? [smile]

Jaybird
Judge a person by their actions, not their beliefs; for very few people practice what they preach!
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Majicwrench
Why change Oring??

Because new Oring works fine, is easier than epoxy.

I have epoxied in past. Feel free to do that if you wish.
Keith
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Scrubjay
Excellent, thank you!  I was thinking perhaps maybe I missed something.  My thought for using epoxy is that whoever gets my gear in the future won't have to futz around trying to learn about the secret-o-ring [smile]

JB
Judge a person by their actions, not their beliefs; for very few people practice what they preach!
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dpatten
This is a great improvement over the stock pump CV

Dennis the Peasant

ICCC Member #1337 (Thanks Dean!)
Coleman 275 Appreciation Syndicate #0086

"One of the sanest, surest, and most generous joys of life comes from being happy over the good fortune of others."
-R.A. Heinlein-
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VincentMechanic31
Great post, Keith. As I learned from you, critical procedure with these unique lanterns.
Thank you.

Now. Where is that video of the guy blasting his with a hunting rifle?
"We are here on earth to fart around, and don't let anyone tell you any different" -Kurt Vonnegut 

- VincentMechanic31 (Vince) 
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adkbill
Thanks Keith for the great pictures and for being so patient w/my questions.

As soon as I get the NRV's from Russ and get back from NY, this is the first project on my list.
Hopefully, it will allow me to bring my extra 2-burner Ted Williams to the Fall Due South Gathering.

Bill H ICCC #1017
Sears Collectors Club #5
G-mod Syndicate #002
BernzOmatic Appreciation Club #023
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Bill
I replaced the dreaded 4th O-ring.  The problem is that the bottom edge of the pump tube is slightly enlarged after having tapped out the poppet assembly, and does not completely "capture" the assembly afterwards.  I've lightly tapped around the bottom of the pump tube with a hammer in an effort to seal it, but it's not fuel-tight, and once the fount is pressurized, fuel still gets into the pump tube. 

Is there a way to seal the joint between the pump tube and the poppet?
Bill Sheehy, aka Merlotrin P.M.      ICCC #1390      eBay handle: wtspe
Coleman 275 Appreciation Syndicate #24  /  Mil-Spec Ops, Bernz-o-Matic, and Sears Syndicates #58
Looking for birthday lanterns dated 4/33, 9/33 & 7/86

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Majicwrench
The Oring should seal against the aluminum pump tube, if it doesn't, Oring isn't right or tube scored. I do a good job cleaning up tube and removing burrs before I shove poppet housing back in.  Then I just tap around with small ball peen hammer. But the "tapping around" does not create the seal, it only keeps the pump together. The Oring creates the seal.
  Before I started changing 4th Oring, I just smeared a fine layer of epoxy on the seam, and that worked well too.
Keith
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Bill
The O-ring I used might be a bit undersized.  Where do you order the check valves?
Bill Sheehy, aka Merlotrin P.M.      ICCC #1390      eBay handle: wtspe
Coleman 275 Appreciation Syndicate #24  /  Mil-Spec Ops, Bernz-o-Matic, and Sears Syndicates #58
Looking for birthday lanterns dated 4/33, 9/33 & 7/86

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Majicwrench
They're on ebay.

search primus NRV for more options
https://www.ebay.com/itm/PRIMUS-STOVE-NRV-PRIMUS-STOVE-JETS-PARAFFIN-STOVE-NONE-RETURN-VALVE-KEROSENE/112579740739?hash=item1a36468443:g[redface]fsAAOSwnH1WXv6T
Keith
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Jim_l
Hey Keith, I thought I'd ask, before this thread gets any older.
With the nrv assembly installed, can you change the pip without removing the whole pip assembly.
Looks like you can.
Been a while since I've seen one up close.

Matthew 5:16: "Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven." Jim-- Coleman Blues Member #014
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hikerduane
The NRV is in two major parts. Usually a NRV tool us Euro stove owners have a few of is used to unscrew the NRV from its location at the bottom of the pump tube. Dont know how many times you can unscrew it in this application Keith shows. The pip can then be serviced by unscrewing the two parts.
Duane
Duane-All seasons, year round backpacker and camper.  So many stoves and lanterns, who's counting.
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Jim_l
Yeah, but in this application, couldn't you just remove the pump and access the pip from the bottom ? I'm thinking you could but not sure.

Matthew 5:16: "Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven." Jim-- Coleman Blues Member #014
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adkbill
I was just copying this post off to my own MS Word file to insure I would have it on my laptop
when I noticed no one ever replied to Jim's question.
He must have figured out that the answer is yes, because he saw no reason to pursue the lack of a reply 🙂
Bill H ICCC #1017
Sears Collectors Club #5
G-mod Syndicate #002
BernzOmatic Appreciation Club #023
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