"If they're loose, they could come off, which is a safety hazard and could damage the cutter wheel." Roorda advises that it's important to power wash a stump grinder once it returns from a rental.

The SC372 stump cutter is powered by either a 37.8 ... offers efficient transfer of horsepower from the engine to the cutter wheel Operator presence system monitors the operator's touch and ...

Since then it looks like he has upgraded the sheet metal to something a little thicker, even though a stump grinder has arguably lower risk due to the slower speed of the cutting wheel and also to ...