Hello all, At long last, here she is. The first order of business was to get the missing burner tube sorted. The broken segment came out easy enough and left some nice M12x1.0 threads to work with. A day spent with a machinist friend of mine netted us this. Please excuse the use of the 500cp Coleman burner, it was the easiest option available at the moment. I had so much fun making the tube that I may make a correct burner just for the fun of it.
I was able to rebuild the air inlet valve with a Presta bike valve and pressure the tank up to 1.5 bar. It held pressure until I opened the tap then it started leaking out the hole in the pipe that the curly fuel tube comes out of. I spent the better part of a week trying to figure out that leak then it dawned on me. The tap is on the wrong side. Although it doesn't look like it the tap block is a one way valve, the shorter side is blocked off so when it's put on backwards the open side is dumping the pressure into the tube back towards the tank, thus my "air leak". Here's my dilemma. The tube assembly screws into the tank and seals at the cone on the back. At full tightness it locks into place with the fuel tube coming out the right side (looking at the tank head on), this also puts the fuel tube curving down into the tank. The only way I can see to correct this problem is the desolder the pipe where it meets the nut and resolder it 180 degrees around. Has anyone got any other ideas or am I on the right track?
Compared to mine (which works perfectly)... http://0flo.com/index.php?threads/2904 ...the tap is on the wrong side. I'm just thinking aloud here but, assuming the threads are the same at either end of the 90-degree tap block, has it not just been fitted the wrong way round? - my tap is on the vertical part of the block...
Hello again, Before I tackle the tap block lets look at the fuel tube. The threads on this tube screw into the tank and I'm assuming that it seals at the neck. Is this a wrong assumption? Here it is tight on my lamp. As you can see when it is tightened fully the line appears on the wrong side. I can't imagine that it should be loosened a bit and sealed at just the threads. That is why I can only figure that this assembly it has been taken apart before and assembled wrong.
Damned, you are right here is your mounting sorry for the picture's quality, I can' do better but I don't see where is the leak ?
Hello Michel, Thank you for the picture. It appears that the design was changed around the same time the tanks were changed, so the fuel block/tap assembly is working as it should. If you look closely at the picture at the top you can see there are two tubes that come together at a brass block to make an L. That little block is solid, nothing can pass through it. The long leg is hollow, supposedly fuel goes in the fitting on the side and out the long end into the burner. Since the other end goes to the solid block the fuel can only go one direction. The short side of the L has a fitting in the end with a hole in it but I believe it's simply the same ferrule soldered on to mount the assembly. Since my lamp apparently has the old style tube but new style fuel tap the long end goes towards the lamp instead of the burner, when open it dumps air into the mounting tube instead of towards the burner. I hope that makes sense. It's almost funny to think that someone had two of these at one time to swap parts.
it appears more and more from our researches that the tank pattern is only a matter of choise (and I guess of buy's price). In any case, one can't say nothing about the production year because there was the 2 types at each period. Did you try to dismantle the lamp and to reassemble as is mine ? I have the impression that you have all the spares but in the bad order ?? If the square brass tube is not drilled, it must be just before the curved tube. I am very puzzled.
It puzzles me too. On a whim I assembled the lamp correctly as far as I could anyway, perhaps this will help visualize my problem. Looks good doesn't it? The only problem is that the fuel tube isn't seated completely into the tank, it needs another half turn. Of course at that point the burner will be upside down. This is why my original idea was to desolder and rotate the tube 180 degrees. Perhaps Karli's picture will shed some light.
Hello Michel, If the burner were turned over the fuel line would still be on the wrong side. After receiving pictures from Karli and seeing that the fuel lines on his lamp were exactly the opposite from mine it was time to act. My first idea was to simply hook the fuel line to the opposite side, but yea it snapped off inside the larger fuel line almost immediately when I tried to uncurl the first coil. I managed to locate some 2mm and 3.5 mm brass tubing at a local hobby shop and after drilling a small hole in the correct side of the support tube I came up with this. Not that pretty but functional, everything is tight and the air only goes where it's supposed to now. The one remaining piece missing is the pricker rod, Connie was kind enough to post me an example but it looks like it was eaten by the mail monster. Thanks to Stu we have this [url=http://0flo.com/index.php?threads/6590 with dimensions so that I can attempt to make a suitable replacement. But that needs to wait until next week.
A little more work on this one today and a great outcome. The pricker shaft is missing so while working on the specific lengths needed for a reproduction I realized that the shaft itself was really all I needed, for now anyway. So at long last here she is; fitted with a 300/400 mantle.
