Farmall Super M battery box/seat

andy r

Member
My Farmall Super M has the battery box under the seat. It has two bolts inside and up front. On the back it has two "L" shaped straps on each side which bolt to the platform top. The problem is most of the replacements do not have the little "L" shaped brackets welded to the back of the battery box and they are calling them Super M boxes. Is it important these "L" shaped brackets are there or are people just using the front bolts to hold the seats? A very few of the replacement boxes do have the "L" brackets. What do you guys think? Thanks
 
You need more than two bolts.If the little angles are missing.Weld a pair to it.Are the old brackets still serviceable? use them.
 
I replaced the battery boxes on both my Super H and Super M with the "cheaper" generic boxes that did not have the L straps.

In both cases the original L straps had broken off the original battery boxes, and I was able to re-use them by welding them to the new box.

Frankly, the two 5/8" bolts are PLENTY to hold you on. If those give way the little L-brackets in back aren't going to do anything to stop you from falling off. They will just twist and break because they have no leverage.
 
Actually, the 300/350/400/450 take a different box than the SH/SM. The component parts to the SM box are the exact same as the parts of the SH box, the little "L" shaped rear brackets are attached (spot-welded from the factory) in the different location.

The number series box has the "IH" embossed on the back face of the box, the SH/SM box does not.

I bought two surplus SM boxes when FARMALL Plant closed down, $5/each... should have bought the whole pallet box... 20 or so. One's on my '54 SH, other's on the '51 M. The box on the SH was rusted out all along the bottom on both sides after 25 yrs. The new box is 35+yrs and no rust yet, but it hasn't seen the dust & dirt the first one did.

Not a big deal to attach the rear brackets, then the supplier can make a "generic" box for both SH & SM. I'd rather have the box made from thicker or better steel and attach my own rear brackets than have paper thin steel WITH the rear brackets.
 

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