The YNF04404 Radiator Lower Hose is designed for Hitachi EX300-5 excavators and functions as the coolant outlet hose from the radiator to the engine. It ensures smooth coolant return flow, stable operating temperature, and reliable cooling performance under continuous heavy-duty conditions.
Manufactured from high-quality reinforced rubber, this hose offers excellent resistance to high temperature, internal pressure, coolant chemicals, oil exposure, and engine vibration. Produced according to OEM specifications, YNF04404 provides precise fitment, secure sealing, and extended service life. It is ideal for cooling system repair, preventive maintenance, and engine overhaul.