YNF17139 11QA-43420 Radiator Lower Hose Doosan R385-9 Excavator Rad Hose Low

The YNF17139 radiator lower hose (11QA-43420) is specifically engineered for the Doosan R385-9 excavator, ensuring efficient coolant flow between the radiator outlet and the engine block. Constructed with high-temperature resistant and reinforced rubber, the hose provides excellent stability under thermal expansion, pressure changes, and heavy vibration typical of excavation work.

Its OEM-matched curvature and wall thickness ensure a secure fit, maintaining consistent coolant circulation to prevent overheating in electronically controlled (电喷) diesel engines. The YNF17139 hose resists cracking, hardening, and deformation, offering long service life even in demanding job sites.

Replacing worn or brittle coolant hoses helps avoid coolant leaks, overheating, and engine downtime. With reliable performance and competitive cost, YNF radiator hoses are widely used by fleet owners, distributors, and maintenance centers seeking dependable aftermarket solutions.