I am not familiar with the 4260 sprayer, but if it just uses a cable from the cab to the hydro pump like the 14 and 16 series combines have, where the clevis pin goes thru the propulsion arm on the hydro pump, the propulsion arm hole would wear oval-shaped and not allow full movement to allow full road speed. We would just pull off the arm and weld the hole back to the original size and replace the clevis pin. The combines would gain their road speed back after the repair.