Optimus 111B manual? Parts interchange?

let he who has not lost his eyebrows cast the first stone stove
Ivan

 

Hi again,

Quick report on my new 111B and a couple questions at the end:

So it turns out my NRV tool I have for my Opt. 45 worked to remove the NRV in my new 111B.

I was able to disassemble the NRV and the pip is pliable with no degradation at all. BTW it does NOT have a pip holder and is one piece that has a narrower end that engages with the spring. (Love that name "pip." It is so dang cute! :-) )

The filler cap seal has some play to it still and the SRV is free to move. I have a spare seal for the cap if necessary.

I'm coming to the conclusion that this stove was only lighted once in its whole life.

The pump leather is definitely in need of replacement though.

Finally, the seal for the NRV appears to be lead and still in the bottom of the pump tube. Can this be left in place and reused? Or, should I remove it and install another? I have some spare HDPD NRV valve gaskets I purchased from the Fettle Box for this.

Thanks,

Christine

 

Christine, If the lead is in tact it should be plenty good. It sounds like you have a good handle on it. And a great stove! Will love to see it burning.
Ivan

 

Ivan

Got the new pump leather ordered. When I get it running I'll be sure to post pics!

Christine

 

'I've never seen it happen and can not conceive of it happening, therefore it will never happen.'

The 111B stove I saw produce a fireball was one that was seemingly running well.
It had been running for a few minutes and was under pressure giving a powerful, roaring flame.
I then noticed that fuel had started flowing out of the pump tube and was pooling in the bottom of the stove case.
I gave a warning but before anyone could act, the fuel caught fire and I have never seen so many stovies jump back in surprise.
Just in case you think I am telling porky-pies, I can say that those who saw this happen included Ross, Ian, David_Shouksmith, brassnipplekey, kev_c.

The stove had been newly acquired by David, fully fettled from Henry.
One of David's comments:
"The stove ran for several minutes and then Trevor pointed out that fuel was leaking from the pump tube. I saw raw fuel leaking from there myself and pooling in the case, seconds before it fire-balled. So the pump check-valve failed - no doubt about it...

IMHO, this can only have been caused by the seal failing as tank pressure increased due to heat absorption from the flame. It may have worked subsequently because tank pressure was lower - or hadn't yet built up to a sufficient level to beat the check-valve seal again."

Here is a similar example, with photos from member littledre.

 

So the stove in question had been "fully fettled"?? And still burst into flames??
So not a case of a pip that got a little hard. Something was done wrong as the above stove was being "fully fettled"

 

So the stove in question was "fully fettled?? So not a case of a pip that got a little hard, but a case of somebody doing something wrong.

And the second example, he states the NRV was loose, and the stove untested. Again, not a problem with the pip, and again, pumping it up and letting it sit for a moment would have quickly shown the problem as fuel would have been leaking all over. As it did, but with a lit stove.
Lighting an "untested" stove is always a risky business as I am sure we can all relate.
I think I will go light up my 111B and make coffee now.

 

Dang, not sure how I double posted......how do I edit?? Oh well, tough being an old guy in a new world.

Christine, good on ya for fixing up that old stove. Looking forward to shots of it cooking something tasty?

 

And the second example, he states the NRV was loose, and the stove untested. Again, not a problem with the pip, and again, pumping it up and letting it sit for a moment would have quickly shown the problem as fuel would have been leaking all over.

Once I get the new pump leather installed in my stove, I'll be doing this test before I bring any flame next to the stove. Considering the volume of the pump tube, it could be a minute or so before any fuel would leak out of the top of the tube. Now that I know this is a failure mechanism, it will be easy to check for this. Other leaks would be pretty noticeable fortunately.

Christine

 

"Christine, good on ya for fixing up that old stove. Looking forward to shots of it cooking something tasty?"

Yes, perhaps later this summer I will find the time to catch a tasty Idaho cutthroat trout of which I can take pictures for all of you being fried up on my new 111B! :-)

Christine

 

Well heck, I am just across the line in Libby......

 

If there is a leak in the NRV/Pump tube, there will be pressure pushing the rod up (assuming the pump cup is sealing).

 

The leak on mine is so minor it does not push up the pump. It is when you go to pump it for the next use that you get some fuel out of pmup.

 

Hi all,

I got the new pump leather installed and fired up the stove. It worked just like the instructions I downloaded from this site said it would. The one part that seemed a bit much was the filling of the spirit cup. Before it burned out, the flames higher than I thought they would. I've attached pictures for your entertainment!

Happy Fourth!

 

Yes, the priming flame seems more than a bit high.....

 

The instructions said to fill the spirit up almost to the brim with fuel. I'll be trying a bit less next time.

 

One tip I have learned here is to make a wick out of fiberglass cord for the priming cup.you will use less alcohol and it helps direct the blame toward the burner. It helps in not spilling it all over also. Here is one thread started by kerophile.