Hi All My Friend Ian has sent me this very sad but very interesting Primus stove in exchange for some personal services rendered The centre part of the burner had rusted/corroded through so as the poor old thing was in two parts , the photos also show the rack & pinion pricker mechanism which makes this model a bit different from the usual two pinters The burner bell looks like a large 96 type but was fited with a silent burner arrangement where the inner cap provided support for the outer by sitting inside the bell & having a venturi tube fitted inside just like the ordinary silent burners. First job was to make up a mandrel to hold the damaged bits making it possible to machine the two halves in the lathe so i had some nice clean edges to work with Next job was to make up a new jointing piece from thick walled brass tube Then silver solder it all back together The NRV was in so tight i had to de-solder the pump tube to get it out in case it sheared off , this is it just soldered back in Next job was to make the venturi burner plate to sit the inner & outer cap on & this is what i came up with All parts made/repaired so test time , burner was nipped up in place with Kerophiles excellent burner washers , i'm not sure of the last time this old girl had flames but she's now showing her true blue colours Must tidy my bench SOON Thanks for looking , Stu
Hi Stu, Great post of the fettle of an interesting stove design. Did you see this old post? https://classiccampstoves.com/posts/65308 It shows the section of steel tube included in the construction of this relatively early burner design Best Regards, George.
Hi George Thanks for the info the inner caps in your post were what i was trying to describe 8) , my burner is marked WC so is correct/original for the age of the stove , but i still need to make a pricker needle assembly for the rack cleaner I'm not sure about cleaning this up yet but it is really filthy , still it may get a good wash at least Stu .
Job well done Stu. That steel vapouriser tube built into those burners rots out - well, seventy years or so on. I'd the same problem with an example from the Netherlands . The instructions for cleaning that type of burner advocate using a Primus tool to scrape the interior surfaces of the tube. That can't have helped tube life if owners did and laid it on a bit heavy and it suggests the burner wasn't the most efficient design to lead to coking up of the vapouriser. Probably the lack of a roll of gauze in the vapouriser tube (pricker rod rules out use of gauze) hindered efficient heat transfer and contributed to coking-up. John
A tremendous piece of resurrection work there Stu, great achievement. Almost unrecognisable compared to what you started with (hope you won't mind these couple of 'before' photos): Just shows the value of keeping things whole and original regardless of condition, that way there will always be a chance of restoration in the future when finally find a way into the right pair of hands.
Hi John & Ian I definately remember your excellent post John & the fix you did "Superb" 8) , just need to work out how to sort out the pricker needle , i did run the stove without the rack fitted but it didn't want to know due as you said to very little heat transference & i did consider the old mesh in the tube trick too & Ian thanks for the extra pic's always good to know where you start from , but still a little way to go for a full across the line finish Stu
Hi Stu, have a look at this post: https://classiccampstoves.com/posts/120433 I believe that I have given away the spare cleaning needles I had but the same arrangement was used on some early pressure lamps so that might be another source. Best Regards, George.
Nice one Stu as always, I hope work is not too manic for you now mate and you can spend time on other interests? Have you done that bike yet mate? Si
Brilliant restoration and a unbelievable transformation, another beautiful old classic put back in to use. Before this great site a stove like that would most likely have been scrapped, well done there
Wow! I repeat what has been said here before me. Great work and thank you for sharing it with us. Ken in NC
Ally when you come to the Newark gathering no doubt someone there will pass on their knowledge , & due to a date change you may even see me there Stu .
Hi, just for completness, this thread includes a scaled photo of the operating rod / cleaning needle for this type of burner: https://classiccampstoves.com/threads/primus-110-spares-need.12882/#post-124872 Best Regards, Kerophile.
