The Heavy Duty Main Shaft (D531RT-2) for the 9 HP Diesel Engine Gearbox of the Back Rotary Power Tiller is a robust and essential component designed to endure the rigorous demands of agricultural operations. This main shaft plays a key role in transmitting power from the diesel engine to the gearbox, enabling smooth and efficient transfer of torque to the rotary tiller mechanism. Engineered for the D531RT-2 model, it supports high torque loads and withstands heavy mechanical stress during prolonged use in field conditions.