FWIW, the baler fire threads led to me buying an Amerex 2.5 gal water fire extinguisher and mounting it on my baler. The small mounting hook that comes with the extinguisher is not appropriate for mounting to a piece of moving equipment (the extinguisher would fall off the hook on a baler).

Mounting this extinguisher to a baler requires a heavy duty mounting bracket you have to purchase separately. Total of around $200 is a lot cheaper than a baler fire.

I don't know if 2.5 gal of water is enough to help but at least it is something if caught early enough.