The 1406-6003 upper radiator hose is a replacement part for John Deere tractors, specifically compatible with the 4050 and 4250 models. As the upper hose in the cooling system, it carries coolant from the engine to the radiator to regulate engine temperature. Part number 1406-6003 identifies the exact hose and fitment for these models, ensuring proper routing and secure connections between the engine and radiator.
