Good morning. After trying the rapid burner on my Hipolito 502, which had not been used for some time, I noticed it appeared blocked due to the poor performance of the burner flame. After dismantling, I found the fuel pick up pipe quite sloppy in the base of the jet domed area. Should this be a tight pressed part in the dome ? Or has a seal around the pipe perished, as I have searched the forum on this subject and could not find any results. Also, looking at any and all diagrams for this lamp and a Petromax 500HK, I find no serviceable seals only the whole pickup pipe assembly available. Any help would be greatly appreciated. Thank you.
I fettled a 1972 German made Petromax 829 recently. The central part of the fuel pick up pipe on mine, when i removed it from the fount just disintegrated and broke up. Also, the jet orifice on the upper part was very badly blocked and gummed up, so I just bit the bullet and replaced part #224 in entirety. I do not think there is an upper seal, just the lead washer that foes into the fount. I think it was circa £30 quid from Base Camp.
Hi @Steptoe It’s ages since I had my Hippo going, it may need attention too now but there is a great thread i found which has tons of advice and input ; I realise it’s about the Petromax but the principle is the same and on some models the parts are very similar Here is a screenshot of the search results with what I typed in at the top and the thread im banging on about circled as well Hope it helps a bit p.s. im going to bookmark it for reference
@podbros Gooday. Thank you for the input. I am curious as to know if it was originally press fitted in ? Or if their was ever a rubber seal in the grooved part of the fuel pipe. I read the link you sent but could not see anything relating to that particular part. I see the item can be bought for a Hipolito or Petromax but just holding off at this time as all the jets are clear and it is just this part that I am unsure as I have not seen any where mention it seperated. The length of the pipe was in place by the fact it was held up by being on the base of the fount. Kind regards.
@Muzzleflash Good morning thank you for your reply. I had a original operating instructions and parts list as per Petromax which I use also. I may have to bite the bullet and buy a new complete part but I am curious to know how it was originally fixed. It appears the gap between the top of the pipe and the base of the jet is too big for an adhesive too hold in place and I was unsure as to wether the recess in the upper part would have taken a seal. Kind regards.
Good morning to you too. I believe the part in question is threaded?. But I didn't even get that far on mine, as to try and unscrew it as the majority of the pipe just disintegrated when I removed it. Perhaps the threads on yours are somewhat eroded and hence loose??
@Muzzleflash There are no threads to the top of the fuel tube . The part with the outlet from the tube has a flat on probably to hold while maybe unscrewing the filter from the bottom end of the pipe. It must be a tight push fit from new or a seal in place to hold it at the correct level for the jet cap to cover it. Thank you best regards
@Steptoe yes my bad, sorry I'd had a few last night. I don't recall mine being fitted like that though.
I'm sure I have one of these somewhere. Can't find it anywhere so far. It seemed unwilling to come apart there to me. I assumed it was soldered in.
I find this quite interesting. Are you absolutely 100% sure the tube isn't screwed into the part with flats? It's decades since I had anything to do with the rapid preheater on a Hipolito but as far as I remember, the tube was a separate entity and screwed up into the body of the preheater, it certainly did on an Anchor and Butterfly preheaters. Forgive my scepticism but to me, that's inconclusive. Could it have been freeze fitted? Have you thought about soldering it back in place? Clean and degrease the parts, tin the end of the part with flats, hold it in place and heat the main body until the solder runs. Job sorted. Just had a look at #225 for £11.95 here Petromax Spares Price List
@Henry Plews Thank you Henry for your comments. I thought at first like yourself the flats would locate and lock it in place. I have pushed , turned around at the same time and it is not locking in to place. This may be the reason all the Petromax and Hipolito, Brytelte advertise it as a combined part. I will order a new one tomorrow and find out if it is something that could have dropped of the bottom and in to the fount why it is not locating. Thanks once again for your remarks.
@Steptoe On a different note, what type of pump NRV does it have in it?? The sealed, non-serviceable variety or one that can be split and serviced?? If the former and you haven't replaced it, then I'd highly recommend doing so. The new ones from Base Camp are the serviceable variety.
Normally, the tube should be screwed into the connection body, and the filter at the lower end can also be unscrewed. I have never seen that the central part with the inner nozzle can be removed from the connection body. It could just be that it is a press fit, which may be difficult to reassemble.
Hi Martin yes I'm feeling like this is the case. I have removed the fuel from the fount in the event any part had dislodged. New part ordered. Thank you for your input.
@Muzzleflash Hi. I am not sure what NRV is in the lamp as it has not had to be removed. As everything works fine apart from the rapid burner problem I will in the future service the lamp and do all the seals etc at that point. Thank you for the info all the same.
Found it and it doesn't want to come out. I don't really want to try to brute force it. It looks for all the world like it is one piece with the pick up tube soldered in from the rear. The only way I could imagine it would look as yours does is if they were a very fine press fit. I can see no gap around the jet.
@JonD Hi Jon. Thank you for the pics and info. I ordered a new part and inquired as to how they are secured. I was told like you mentioned and also Henry being soldered in. There was no trace of solder on my part which could have been a poor fit or lack of solder from manufacture. It look as though it would be a difficult task from behind. The solder would have to miss the two very small jet holes in the top part. Cheers for the update.
@Henry Plews Hi Henry. I am happy knowing how it should have originally fitted in as I had turned it around 360 degrees and could not get it to locate. It may have been pressed in and never soldered and age and some corrosion left it secured. Thank you for your time to comment.
I have had Racal Navy radio receivers where they managed to leave out the solder. In that case it was silver plated wire wrapped around a silver plated terminal. It passed their final test and no doubt worked well for many years. In about 2005 it was giving me trouble, only 40 or so years after it was built in 1964. In your case I wonder if the groove in the rapid jet was meant to have a circle of solder wire added before the assembly was heated up to melt them all together. Perhaps it got missed out like my Racal. My one is from a Hipolito H502. It was blocked and I replaced it with another from the P.max spares site. I always said I would try to revive it. More likely now it is no longer lost I suppose.
The jet in mine is obviously blocked with crud. I would like to have a go at clearing it. I was much too scared to try it before so I just replaced it with new. I think a 0.006 acupuncture wire would probably do it. Now thinking on it again we might have discussed all this before as well. Going off to look for older posts.
Yes it will, so will a Petromax type 250cp cleaning needle (including the air holes). There's also #180 Cleaning needle for preheater here Petromax Spares Price List
I have cleaned mine out this morning. The 0.006 Acupuncture needle was indeed fine for the jet and air holes. I didn't know the fuel filter unscrewed. There was a lot of rubbish inside that which needed to come out. Most likely why the jet blocked in the first place. I found a 0.044" overwound guitar string was the perfect diameter to ream out the tube. (1.1mm) I might have to try it back on the '502 now.
Normally the parts on Hipolito H-102,202,302 and 502 look like this. You can always unscrew them,clean them and reuse them. The parts were taken over unchanged from Petromax by Hipolito in 1974.
Well at least for me those pictures are totally at odds with the ones from the OP (original poster) at the the top of the thread. What happens in the jet/nozzle assembly? The fuel filter end I think we agree.
