This joystick provides the operator interface for controlling hydraulic and electronic functions on the host tractor. It is an analog unit that sends variable-position signals to the machine's TMS (Tractor Management System) controller, which then translates the lever movements into commands for the implement hydraulics, transmission, or other auxiliary systems. As an original-manufacturer component, its internal potentiometer and mechanical pivot geometry match the original assembly's calibration curve, so no re-programming or adaptation is needed at installation. A failing joystick typically presents as erratic implement response, non-linear speed control, or a dead zone in the lever travel.