Hi The head of the NRV snapped off when I was installing same in my Campingo stove. Does anyone out there have a proven method for removing the NRV in this situation other than melting the solder around the tank joint with the pump tube and removing the whole pump tube?
https://classiccampstoves.com/threads/removing-a-nrv-with-a-screw-extractor.16533/#post-166787 Put easy-out and extractor in the search box and you will see other threads. Good Luck if you go this way. Best Regards, Kerophile.
Hello Pondmeister. Campingo's are well known for tight NRV's but having one break while installing is a bugger. Having a shorter pump tube makes repairing a bit easier though. As Kerophile suggests; use an 'Easy-out' tool. A set is quiet cheap to buy here in NZ. The type I am referring to are longer than what is shown in the link above. Choose the smallest size and solder it into the smallest socket it will fit. Attach an extension bar from the set to give you reach and use the wrench to turn it anti-clockwise when in place and it should grip. Continue turning until it comes out.. You will wreck the NRV top part but it is easily replaced and better than having to remove the pump tube. Cheers, John
Cheers for that helpful hint Kerry. That was a problem that I had encountered and now I know what to get for my next fix. Cheers, John
I often use that splined remover, and they can work very well. I prefer them much more than the tapered ones. But they are very hardened, and are quite easy to snap off. And then you're in big trouble... However, that will hardly happen with brass.
I had a couple in a row that I had the expert fix for me on really old stoves, I did not want to do a sloppy job of re-soldering the pump tube back in. They were tough for him also. I might have really messed things up. On a Burmos, I could not get the extractor to get a bite, it was the screw in type. Duane
When you get a Stud remover set it's better to get one from "a known brand". F.ex to Stahlwille set: http://www.hanico.com/gb/gewinde-ausdrehsatz-905-25-96713025.html it's possible to get individual Fluted Removal Pins as a spare part. Spare Fluted Removal Pin come with it's Splined Nut. Instead of right hand drill bits it's better to get left hand drill bits so they already turn stuck screw into correct direction before use of extractor tool...
Lefthand drill bits have worked for me on their own before. I think the combination of vibration, heat and the lefthand rotation works them loose. Worth a try.
Yeap, they are cheap and easy to use extractors on their own. Also nowadays it's quite easy to get them from a normal tool shop.
Thank you Kerophile and Three dots, I was thinking of using an extractor as I have a set, you have given me the confidence to give it a go.
Normally stovies don't need to get confidence from others. Actually this section in this forum is for cases when you have already used your tools with no luck and try to seek some help how to go forward (how to remove broken extractor and it's handle from the pump tube, how to straighten screwed pump tube, etc.).
Depending on what hole remains in the NRV; you may have to drill it a little larger to fit the 'Easy-Out'. Just make sure your drill is not too big in diameter or it could damage the thread in the bottom of the pump tube. Also make sure the drill is centered correctly. Good luck. John
I have drilled 4 mm hole through the NRV head to get extractor in. Major diameter of the NRV mounting thread is 8mm (which makes minor diameter to be around 7,25mm) so there is almost 2mm safety margin for drilling. If anyway NRV mounting threads gets damages threads can be re-threaded.
