can s.o. tell me what does the following lettering means:
I found this pic in the historic album here.
2nd question: " Caution do not overfill allow for expansion ":
When was this painted, in the factory or in the field? Has the "C" of Caution one horizontal or 2 vertical strikes?
Thanks for answering and for lend out of the albums
The vent for the fuel tank ran to the air cleaner. There is a small valve in the tank pickup assembly where the vent line connects to it. When the jeep runs it sucks air out of the tank and vents the tank. When not running it tended to allow pressure to build up. Some times when the tank cap was opened it would gush out or worse yet it would go up the vent line to the air cleaner.
As far as the stencilling of the letters goes. Ive only seen 1950's military ones with the two verticle bars in the C not a horizontal bar. I think it might be a civy stencil but I may be wrong.
We are getting fuel temperature caused expansion confused with the tank's venting system. They are interrelated but they are seperate issues.
The warning "Allow for expansion" means do not fill it all the way to the cap. In almost all cases the fuel coming from the storage system is quite cool compared to the ambient outside temp. So the fuel will expand in volume as it warms up.
There are several caps used throughout M38 production and there was a lot of cap mixing going on. The non-vented cap was used to prevent water from entering the tank during fording operation. There was a manual selectable cap that allowed you to mechnically select vented or unvented. No matter which cap you use the tank relies on it's primary vent system which is the tube running from the pickup adapter on the tank to the air cleaner. Unless this tub gets inadvertantly plugged the tank is always vented irregardless of weather the cap is or is not.
