tripple baffle gas cap

Farmall plowboy · Jul 19, 2013

Hope somebody can learn me something, I have an A
with a baffled gas cap. years ago when I young my
grandpa"s A didn"t have this type gas cap, we never
had problems, thanks....

Janicholson · Jul 19, 2013

THe original cap with vent and gasket was typical for the times. It had the following issues:
When the tractor was fillednear full, and driven, the fuel would splash against the cap and erupt out of the vent.
The ability of the cap to conform to the (often bent) tank neck was marginal, allowing more leaking.
The cap had no ability to limit leakage in a tractor accident.
Many law suits were filed and a court settelment was reached requiring the replacement of all IH/Farmall fuel caps of the non baffeled style with the far more protective taller cap.
They are free, they work, and can be painted to match.
Many purists use the original cap at static shows, but revert to the baffeled cap when running the tractor.
If you were to have an accident, or your tractor was in an incident in which there was a fire, you might be considered an accessory to resulting fire if you use the old style short cap.
Jim

CNKS · Jul 19, 2013

Jim, I thought the vent got plugged and gas went everywhere when removed. I am well aware of the leakage though. In the 50's with a full tank in 5th gear, the gas would hit me in the face -- I never thought much about it since I didn't smoke. All my tractors have the new style cap. Actually I was more concerned about running over the gas tank on a Ford 8N, and it dripping or pouring on the exhaust pipe. I quickly learned not to do that. Also, my father in law was filling the tank on a W4 early in the morning, and I think static electricity resulted in burning up the tractor, it might have been another spark of some kind though -- I think the engine was just shut off. He wasn't hurt--he replaced it with a 656.

Janicholson · Jul 19, 2013

The two vent holes are a good improvement (even on the mid 50s X00 and X50 series with only one hole. I got a dangerous bath after putting a 12OZ bottle of gumout in our 350U (cap off) when the dip tube in the tank forced all but 2 gallons out the neck like a fountain of death. I ran in a zig Zag pattern till I quit leaving a trail of liquid gasoline. The engine was way hot (which heat soaks the tank) and I had no idea about vapor pressure and learned the hard way.
I think fuels in the past had much less high end volitles in them. Jim

FBH44 · Jul 19, 2013

Jim - You are correct, I think. One old manual I have says to use fuel with at least a 70 octane rating, another as I recall says to store gas in a covered container. Got the impression --- no washtubs, no buckets...

tripple baffle gas cap

Farmall plowboy

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Janicholson

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CNKS

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Janicholson

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FBH44

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