MTFCA Forum

Hello.

I am working on an "emergency" gas-tank cap. In case that I am low on gas I want to use an air-pump to pressurize the tank a little bit.

Of course, I don't want to modify the original brass cap, and even a used one is too expensive because of shipping cost, so I got the idea to 3D print one, including the thread, in Nylon, with a little nipple for a 6-4 mm (OD-ID) PVC hose.

Can somebody tell me which thread is used on the gas-tank, please?

I have a Touring 1916 with round tank under the seat.

Do metal barrels have the same cap? Never thought about that, but would be an option, too.

Hear is a link to a previous discussion about the same question http://www.mtfca.com/discus/messages/33 ... 1386386199

Thank you so much for this link.

Rainer

The petrol tank cap is a fairly standard size and thread. A Fordson tractor cap fits, either the radiator cap or the fuel tank cap. A more ready source is the bung in a 200 litre fuel/chemical drum. Nowadays these are usually diecast, so any fitting to the bung would need to be bolt-in rather than welded/soldered.

Allan from down under.