@Remus1956 Unfortunately I can't post a photo of the NRV, but I can confirm that it is similar to the @Doc Mark I'm sure your stove is...
I made the tool by eye and with a new NRV as a reference. The shape is made by tilting the cutting wheel only. There may be more professional ways...
Often the force needed to release the nrv can break the pump tube or tge soldered joints. No matter the tool used. Penetrating oil beforehand can...
...pump screem Juwel, possibly most Juwel 31 or clone of such (c/f here). NRV is Petromax slotted type. But no markings of any sort on tank or...
...phenomenon, so minus 6 degrees Centigrade and your viton (?) NRV pips won’t seal. In just the one stove or several? Without scientific...
...96 and it had no seal either. I think it is from the 50’s so not old by any means. I had to de - solder the pump tube and base out to undo the NRV
A good nrv tool on an impact wrench with minimum torque is maybee a solution. I m going to solder a 3/8 socket on a custom made, closed, nrv tool....
...some sort of liquid (Coleman fuel? Carb cleaner? Other?)? Got my parts from Fettlebox, waiting for a friend to loan me their NRV tool. Thanks.
...probably make something that might work if I had the dimensions of the NRV, it's kind of hard to measure accurately at the bottom of the pump...
...burnt kerosene in it and it has served me well. I have replaced the nrv pip and fuel cap oring a few times. Apart from that haven’t really had...
1952 Primus No 96 Replaced pump cup and NRV, now it runs beautifully [ATTACH] [ATTACH]
The pump assembly completed. New filler cap seal and NRV pip. Testing.[ATTACH] Looks like it's due for a new nipple, a decoke, and a repack of the...
...I bit seemed to be the same. I didn’t want to keep trying numerous NRV’s to see if one would work or not, I have a good stash of old ones,...
...a nice Optimus 111 T. It is a new thing for me. I only changed the NRV and it appears to me that it works fine. My concern is to see that the...
...have something: Optimus Spares Price List For seals, pump leathers, NRV pips/washers The Fettlebox (site sponsor) will have everything...
Hi. Like you Im glad to have found this forum. Your NRV removal tool, the cut out I presume is slightly less than 5mm. When this was done did you...
Do you mean you couldn’t force air into the tank or that the NRV didn’t hold the pressurised air in (pushing the pump rod back out)?
...I can see the spring inside clearly, a positive sign. I ordered an NRV wrench and some gaskets and pips from the UK but after I placed the...
...in electrolysis tank, jet, needle etc cleaned in ultrasonic, new SRV & NRV pips made to replace hard ones. Case resprayed. Just need decal for lid.
...is that some have the old style optimus one piece molded pips in the NRV. In that case you'll need the little brass pip holder cup. Last I...
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