Hello, I had a Petromax needing service. Unused for many years, maybe therefore the NRV was stuck. I was able to unscrew it but it came not out of the pump pipe. I made a tool out of an bolt extractor, the smallest size I had, took an old fashioned cable connector, removed the plastic. Placed the extractor in, and on the other side a small screwdriver. Then I moved the extractor in the tiny hole in the middle of the NRV, turned the screwdriver to the left in order to secure the extractor in the NRV. In that way I managed to pull the NRV out of the pump pipe, without removing the whole pump pipe. The picture will explain. Regards, Ton.
@vissertw Clever, Ton. A shallow-tapered spike (ice pick in the photo) jammed firmly (but not destructively so!) into the NRV’s air inlet hole works for me. John
Pretty ingenious ideas both. I didn't thought of those yet. Perhaps the NRVs that I came across in the past weren't as stubborn to remove. They came off after some 'wriggling' work with a screwdriver or a pick, some shaking or sometimes with compressed-air assistance..
I have a Optimus 200 that the NRV stuck from old fuel and having a hard time getting out, and it's starting to get messed. I my have to go down this route. Tony how do you get enough bite into the hole to unscrew?
What do you mean with: a hard time getting out? You can't unscrew it or is it unscrewed and stuck? First: use the proper tool. Second: bend a small hook on a piece of metal wire and "angle" it out.
I will try to explain Dean. The thing is the opposite from the tool to create thread in metal. This one does the job by being turned to the left and in that way eats itself stuck. Imagine a broken bolt, drill a hole in it, screw this thing in the hole anti clockwise and if you are lucky in the end the rest of the broken bolt will come out. In Holland we call this a "linkse tap" maybe in English " left tap"? Regards, Ton.
I use bicycle spokes to make hooks, they are very strong and will not bend back, but in this case it did not work Wim.
Talking about Petromax, I recently saw an advertisement, my question is not about the lamp , it is about this cylinder formed thing with holes in, what is the purpose of it? Regards, Ton.
It is a copy of the heater which is standard on a Px model 1500. I am not sure if they are still available but people, mostly in Germany, where putting those in 500cp lanterns and use it as a heater, most effectively without a glass globe. Biggest challence is the right metal for the heater box.
Hello everyone, there was also a temperature-resistant version. This was divided into two parts and can withstand very high temperatures.
Nice version of the heater. What's it made of? Some ceramics? Or cast iron or some nickel-chromium alloys?
I know them as "Broken Screw Extractor" or "Screw & Bolt Extractor" a tap is normally for cutting internal threads so a left hand tap would be for left hand threads.
@MYN Hello, I think it is one nickel-chromium alloys. More than 10 years ago there was a collector who built this custom-made item.
So it was not an item sold with the lantern. Just to make sure before confusion kicks in. There where also people who made their own two tie mantle support.
Nickel-chromium alloys wouldn't get as easily burnt off or oxidized when exposed to direct flames, as steel or iron. Ceramics would be most resistant but rather fragile and easily broken.
