This potentiometer is a rotary position sensor used in the electrical system of a self-propelled forage harvester. It converts the angular position of a mechanical linkage into a variable voltage signal for the machine's control unit. The sensor is mounted at a pivot point where its rotation corresponds to the movement of an actuator or lever, allowing the controller to monitor and adjust the position of the driven component. A failing potentiometer produces erratic voltage signals, causing the controlled function to behave unpredictably or fail to respond to operator input. The manufacturer machines the housing and shaft to match the original assembly's mounting geometry, so the sensor seats correctly in its bracket without modification.