Massey Ferguson Power Steering Pump Pulley - This Power Steering Pump Pulley is used with S03-1003 Power Steering Pump. It is designed for Tractors using Eaton Style power steering pump. It is made of Stamped steel. Measures 5 inches outside diameter, 0.675 inch bore, 1\8 inch keyway, 0.9715 inch total width for 1\2 inch belt.