NAA gas tank bolts

petertay · Oct 18, 2017

The NAA gas tank is mounted with three bolts. The two rear bolts tighten down. The forward bolt is 2 inches long with a 1-inch spring and it doesn't tighten. WHY would this be? There is no reason (that I can think of) why the front of the tank should be loose. Thanks for the reply. --Peter

Royse · Oct 18, 2017

I'm going from memory here petertay, but I believe that spring
was longer than that on my NAA's. It held the tank tight enough
that I had to loosen that bolt/nut to get the tank installed.
I put new tanks on two of them and it seems they were both the
same. Tank certainly wasn't loose and just flopping around up there.
I don't know the engineered reason for that design, but it was
used on later tractors too so possibly it was for flex caused from
terrain or heat?

Dean · Oct 18, 2017

Most likely to provide stress relief to prevent metal fatigue resulting from vibration and differing thermal expansion.

Whatever the reason, it appears to have worked.

Dean

Royse · Oct 18, 2017

Happened to think, the back two bolts had cushions too.
They weren't bolted metal to metal. Leather or rubber bushings.

NAA gas tank bolts

petertay

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Royse

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Dean

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Royse

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