A wedge-shaped deflector for small trees and brush, pivotally mounted on the side of the chassis of a lumbering machine ahead of the front wheels pivots freely about a horizontal axis which is substantially parallel to the longitudinal axis of the machine. In its normal, downward position, the deflector presents a surface upon which steps are secured to provide access to the cab. Another surface, slanting downward and outward away from the side of the chassis engages solid and immovable obstacles along the path of the machine and causes the deflector to pivot upward, thereby avoiding breakage. Upper and lower stop means limit the arc through which the deflector can pivot.
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