At the beginning of my adventure with stoves, I used an NRV unscrewing wrench bought from Juliands. Quite often it happened that it jumped off the head of the check valve when it "sat" tight. Then I made a wrench from a piece of steel rod. He also sometimes had problems. Finally, from a tarnamite rod, a friend rolled out for me a kind of bushing 99mm long with an outside diameter of 17 mm and an inside diameter of 9 mm. After cutting it lengthwise, you can put it on a wrench from Juliands and lock it in place by tightening the pump plug (from a stock of old parts) When you feel that the valve threads have let go, unscrew the plug and continue unscrewing.
Very simple fix to allow locking the tool down so it doesn’t rise off of the NRV head or shift to the side. I like it. I still have one old 45 I think that nothing works. I do have a custom made tool that I can adjust. Duane
Good work @Knee, a simple but effective way to keep the tool concentric and keep pressure on the head of the pump valve /NRV. Just thinking aloud, with a shorter spacer and an assortment of washers, the tool could be adapted for different length pump tubes...
@Knee, perfect solution Stanislaw, that wont be slipping off any tight and seized NRV,s, the standard NRV wrenches often slip off any tight and seized NRV,s. I have two wrenches made by one of our members, one for 2pint stoves and the smaller one for Half and pint stoves, and have not one slip off,. I did make one my self a good few years back, that work better than the standard wrench, but have since converted it to remove Coleman stove NRV,s
Even my custom tool struggles some, only one it won’t stay on. May need to use an extractor, found some better ones. The one stove, the NRV only weeps a tiny bit, hardly worth fixing, but with me getting older, much of my large collection just gathers dust. Duane
