To replace the foot throttle on a Kubota L245DT, first, disconnect the battery and remove any covers obstructing access to the throttle assembly. Unscrew the old throttle, disconnect the linkage and cable, and then install the new throttle by reversing the removal process. Alternatives include using hand throttles or aftermarket throttle kits that may offer different features or enhancements. Always consult the owner's manual for specific instructions and compatibility details.