Hi, I have been working on a Netherlands Army Military stove, which I acquired with the help of a good stove friend from the North of England. I have also had advice, and help with a modification, from two other stove-friends. Here are a couple of photos of the stove, which is now running well: In particular I wanted to comment on the style of pump fitted to this stove, and perhaps get some comments from other owners. I fired up the Geniol/Heinze several days ago and made my afternoon coffee. The stove performed well but the pump piston came adrift in operation and I had to recover the pieces from the bottom of the pump tube. On examination there appears to be very little holding the pump leather and washers onto the shaft, and it would be a real problem for a soldier if the pump fell apart on the battlefield. I degreased the pump parts and re-assembled, applying Locktite Blue thread sealant to the threads The pump works well after the thread-lock, but I wouldn't like to carry out this fix in the field, if only because I like to get the threads really clean and oil-free before applying the thread-lock, and allowing it to dry on the assembled parts: I took the above photos of the pump internals, when I had it out of the stove and cleaned for thread-lock application. I think the air pump is a poor design, as there is no moving piston/ valve function, as is found in a Primus. Instead the pump relies on by-pass flow around the periphery of the pump leather, on the back-stroke, to perform well. Because my stove was not complete when I acquired it, I discussed the issue with a friend, saying " I think it is original equipment, rather than a later addition. What do you think? He replied: "I'd guess that your pump is a replacement, based on the observations that: 1) The knob has Petromax stamped into it and it appears to be blue (although I'm not sure from the pictures). On the contrary, Heinze Geniol stoves I've seen have a black unmarked plastic pump knob. 2) From about the 1970's or so Petromax plastic lamp parts are blue, including the spares that are sold online" Despite the pump knob colour and markings, the pump appears to be very similar to the pump installed in other Dutch Military stoves of this type in the Reference Gallery. It seems that the makers just raided the parts bin in the Pressure lamp factory to equip their stove pump. Any comments or information gladly received. Best Regards, Kerophile.
I have a Heinze/Geniol Military Stove. It's pump piston is with black unmarked knob. Pump leather cap and it's mounting washers are same as in your "Petromax piston". In my piston threaded mounting cap is a bit more better looking, it looks like machined. I have one of those China made Petromax lanterns and it has exactly same type of pump piston that you have. Threaded mounting cap looks like pressed against the mold. They might have used those "petromax pistons" when they saw no reason to make pistons by them self but to get cheaper ones from Petromax supplier at China. Or somebody has changed the piston on some stage of the life of the stove. I have planned to add some kind of spirit cup to my Heinz/Geniol because the use preheating torch needs quite(=too) much pumping....
I dug my bag of Petromax lantern spares and from the bag I found both type of threaded pump caps that seems to used in Heinze stove, machined and pressed type. Also I found black unmarked pump knob as in my Heinze stove. Maybe at Heinze they have always used Petromax pistons... I just received new stock floating pump leather & washers assemblies from Juliands: http://www.ebay.co.uk/itm/PRIMUS-ST...753902?hash=item1a024d0dae:g:GnEAAOSw3ydVktgh That seems to fit quite nicely to Heinze pump tube. So maybe it could be used in piston conversion project. Petromax piston rod diameter is 5mm so that "Juliands" (and classic stove) pump leather assembly slides up to pump knob in piston rod. So something is needed to prevent it to slide too far... Just remove all washers from that "Petromax piston". Make M5 thread in piston rod longer that nut can be placed on the back of the pump leather assembly to prevent it to slide too far on piston rod. Two normal nuts or one locking nut on NVR side could be used to secure pump leather assembly on it's position. If pump leather assembly from a classic stove is used in above conversion it needs to have a new&wide leather cup because pump tube inner diameter in Heinze stove is 1mm larger that in classic stoves.
Both of my Dieselkocher stoves have black, unmarked, pump handles. My stoves are German, not from The Netherlands.
My Heinze is also from Bundeswehr. Language on lid's instruction sheet will tell if the stove is from Dutch or German Army...
@kerophile I have taken a look at my Dutch Geniol stove and it uses the same configuration as you have, although mine has a black, non branded pump knob. Mine was brand new when I bought it, so I think this is original to the stove. I have used mine for some time now and I have to admit that the pump leather on my stove has yet to come off. On the other hand, it has been 8 years ago that I have bought this stove, so I may be wrong
Hi ajvuik, thank you for making the check. I am now pretty sure that the pump internals are correct for this model of stove, although the pump knob is probably a later replacement. Functionally the arrangement is identical, and now that threadlock has been applied to the pump retaining nut I am sure it will stay in place until I, or later owner, needs to remove it. I did acquire a few pump shaft springs from Base Camp, and added one by removing and subsequently replacing the knob and locking ring from the top end of the pump shaft. I also found that the storage bags I use for British No12 military stove also fits the Heinze Geniol. https://classiccampstoves.com/threads/british-army-no-12-storage-bag.29375/#post-299978 Best Regards, Kerophile.
