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A common problem with hydraulic cylinders is rust and pitting of the cylinder rods. If equipment that incorporates hydraulic cylinders is stored outside with the cylinder rods extended, the rods are exposed to weathering. Eventually, the rods will begin to show specks of rust that develop into pits. Once rusting and pitting occur, the rod will destroy the cylinder seal the next time it is activated.
Several models of small walk-behind stump grinders are aimed at homeowners, rental use and smaller professional operations. Most are reasonably safe if used carefully, but a few are not safe no matter how they are used.
