Are the gas tanks in a 300b and 400b the same?

The difference between a 300B and a 400B is the 300B has a dry clutch, a 400B has a Case-O-Matic clutch. Otherwise they are the same tractor.
 
The p/n for 300B gas tank is G13995 and for 400B G14080. That indicates the two tanks are not identical but doesn't necessarily mean that they are not interchangeable. No substitute for eyeball on the tanks.

Joe
 
I got a hunch, just a hunch, but I wonder if the 400B tank has some extra clearance underneath for the C-O-M control valve? If so, a 400B tank would work on a 300B, but not the other way around. I've spent hundreds of thousands of $$$ at the school of hard knox, and was hoping to get my diploma soon, but I see I can't, yet.
 
a few years ago I bought a 300B gas tank to go on my 400B. It would not even get close to fitting. My best recall is the 400B tank has an extra cut out area for the com valve.
 
(quoted from post at 23:39:18 09/21/18) I got a hunch, just a hunch, but I wonder if the 400B tank has some extra clearance underneath for the C-O-M control valve? If so, a 400B tank would work on a 300B, but not the other way around. I've spent hundreds of thousands of $$$ at the school of hard knox, and was hoping to get my diploma soon, but I see I can't, yet.

I graduated from that school. The only thing I got was a kick in the butt for all my troubles.
 

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