NRV = non return valve. This is the valve at the bottom of the pump tube. It is usually a rubber seal (pip) held in place by a spring. Pumping...
Looks like the NRV needs a service. Probably the pip needs replacing.
It sounds like there is a leak somewhere. Probably the filler cap seal that has gone a bit hard. Btw, the handle is not on correctly. It should...
Without starting to find all my different 1020s, I am quite sure that the overall design of the glass cage and base has not changed from 1934 on....
For the 1020s up to, and including, 1933 there was no text on the flame base. This was stamped on the extra plate that was fitted about the cage...
I believe the intention with the tube is to have a flame near the mantle when it is time to either turn on the fuel or start pumping. When the...
Glad you got it sorted. These lamps usually work well and are reliable. The only complaint I have with them is that the spirit cup is too low to...
If you can do that with one of these tanks I will be impressed. I usually pump until my thumb hurts. How long had the lamp been lit when you took...
A 250cp mantle is too small. As Tony says, it is a good idea to get some cheap mantles of the right size to use for testing. I have a selection of...
Do you know if the lamp had been working with the air intake like this? I'm wondering if someone has used it as part of electrocuting the lamp.
The vice part is good advice, but I would use an old drill chuck or similar to hold the barrel of the NRV. It has happened before that the side of...
I just use a light hobby oil for oiling the pump leather. Sometimes they need a bit of help to get the full size back so I use small thin...
I would strongly advise changing the filler cap washer. They can be bought, but a lot of people make their own. You need 2mm thick rubber of at...
Welcome to the forum Pär. Maybe a moderator can separate this into a new thread. The lamp looks to be in good condition but is unfortunately...
I make up a citric acid bath with about a level tablespoon of citric acid crystals to a liter of boiling water. I then let parts soak for 10...
To undo the lower vapouriser, the best method is to have someone to help you. Have them hold the tank flat on the bench so you can then apply the...
First off, dating the lamp. From the parts on it, it is not possible to get closer than from the late 1960s to the middle of the 1970s. The 350...
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