This pin secures a component within the hydraulic pump assembly of a self-propelled forage harvester. It acts as a locating or pivot point, maintaining alignment between the pump housing and the driven element it positions. Wear on the pin bore or the pin itself can introduce play, which leads to misalignment of the pump internals and a reduction in hydraulic pressure or flow. The original pin is machined to the same diameter and surface finish as the factory assembly, ensuring a tight fit in the bore without the need for shimming or reaming. When replacing, inspect the mating bore for ovality and replace the retaining hardware if present.