This wooden bearing shell is a component of the straw walker assembly in a combine harvester. It supports the oscillating shaft that drives the walker motion, allowing the straw mat to be conveyed and separated from the grain. The shell is a sacrificial wear surface; as it wears, the shaft develops excessive clearance, leading to increased vibration and potential misalignment of the walker mechanism. The set includes the bearing shell halves, mounting plates, and fasteners. On installation, ensure the shell halves are seated squarely in the housing and torque the retaining screws to specification.