Hello all, I just picked up a 22b as It looked like a wicked little stove with good engineering. Well after scouring your forum I have come to understand that this is truly a handy stove. I am looking to use it as my primary camp stove and can hardly control myself from trying it out. After reading many of the posts I do wish to replace the non return valve and the fuel cap gasket. Will the pump tube be coming out with repair. I am worried about trying this as I have zero stove experience. If I do make or buy/build the tool to get the NRV out then what? Can anyone help explain how I should proceed to getting this up and running. Thanks, great forum tons of wisdom.
The pump tube is soldere to the tank hence you will need to fabricate an NRV tool or order. Frome a member who makes them locostove. The rubber PIP can alsobe punched out with a hole punch. Lotsa information in the forum and the stove is one of those sought after by members. Congratullations. Ron
Thanks fellas, The forum has been great info on how to make the tool and where to get the gaskets I am wondering what the NRV is. What does it do and how do I service the thing once I get it out. Side note, The stove drew first blood as the screwdrivwer slipped when trying to get the heat shield off. Stove 1, Me 0
It's like a check valve, if working properly, allows you to pump air into the tank without it escaping back out. If not seating properly, air will escape or if the tank has fuel, fuel will leak thru. Also, when you pump air into the tank, after a number of pumps, if the shaft rises on its own from the pump tube, you may have a bad sealing NRV or at worst, a solder job gone south as the piece that holds the complete NRV is soldered to the bottom of the pump tube. When the NRV is removed, you unscrew the end that is inside the tank and the cup that holds the rubber pip should get pushed out by the spring behind it. It may need coaxing like many do because of their age and how long they have been in place. It is easy to crack the end piece, it is a little brittle, use a piece of tape wrapped around the NRV to prevent scoring, then use pliers to unscrew the lower half, being careful as it is hollow. In the Action Forum, I have a pic of my 22B under the Tamarack Flat post. Not a good pic of the stove. Duane
Hi BWC A couple of months ago I was facing the same problem as you are with a NRV leaking on my first stove. Gots loads of assistance from the forum. Bought a tool from Spirit Burner which worked great because filing a slot in a wood chisel as a removal tool didn't prove to be a total success. However after removal of the NRV I was a bit daunted how to secure the valve in a vice without crushing the body. Used 2 pieces of softwood against the vice jaws and tightened until I had enough grip to secure the valve body. Scary but it worked. Long enough pieces spread the pressure along the valve body to avoid distortion. Spirit Burners precut pips fit real great. You just need to check the size you need
Be sure to baby that left burner, as It's a mirror image of the much more common right burner. The right burner also is in the many 111 variations. while the left is rare!
As RonPH suggested - 'Locostove' makes good NRV removal tools which would be very handy to have for other stove aquisitions you will have in the future. It would be risky making your own as the tool would have to be a very good fit or you will damage your NRV which would need more drastic action to get it out. Cheers, John
If the NRV is working, don't mess with it. Most optimus 22's seem to have optimus's annoying NRV pips that do not sit in a brass shoe. They can be a pain!
The yellow dog wrote: "if the NRV is working, don't mess with it. Most optimus 22's seem to have optimus's annoying NRV pips that do not sit in a brass shoe. They can be a pain!"[/i] That was going to be my next question. This stove came with half a tank of fuel and it is not leaking. I pumped the tank, opened up the burners an got a nice jet of fuel. I'll let you know how a test fire works later as the holidays will demand my attention. Still stuck on the heat shield. I have been using penetrating oil to loosen the screws but they are not giving in.
I thought to post a picture of the stove. Finally got the heat shield off. (stove 1, me 1. tie game) Thank you all for your thoughts.
Ah, one of the newer ones, as it has the clover leaf or flower petal grate. I just poked the nrv on mine, later replaced the pip as it leaked a little. I have the older versions with the rails. Duane
I took a hint from old ChickenThief and I use a 3-jawed chuck from an old hand-crank drill to grip the NRV. It grips the fragile tube at three points, 120 degrees apart and does not tend the flatten or crush the tube. Works great!
Well it's up and running. I am on a slippery slope. Can't seem to stay away from the forum. Truly enjoy learning about the work others have done with their stoves. Please forgive my inexperience but you need to start somewhere.
Nice. I have to adjust the burners on a 22 I picked up, one was attached at a wrong angle and I need to adjust it, makes the control knobs hard to operate. Duane
