4311026420 Hitachi Loader Down Radiator Hose for ZW370 

431026420 is a special part number for the radiator hose under Hitachi's original loader, mainly suitable for the cooling system of multiple wheel loaders from Hitachi. It is widely compatible with Hitachi ZW series loaders, including mainstream models such as ZW140, ZW180, ZW220, ZW250, ZW310, ZW330, ZW370-G, ZW550-G. This part number is the standard code for the original radiator hose, usually used to connect the engine water outlet to the lower radiator water inlet, forming a critical pipeline for coolant circulation.
 

The radiator hose, as the core transport component of the cooling system, is made of high-quality ethylene propylene diene monomer (EPDM) or high temperature resistant reinforced rubber. It is usually reinforced with polyester threads or fiber braided layers inside to withstand the pressure and pulse of the coolant. The hose design has excellent high temperature resistance performance (working temperature range is usually -30 ° C to+120 ° C or above), and can withstand the erosion of engine high-temperature coolant for a long time. Its inner wall is smooth, with low resistance, ensuring stable coolant flow; The outer wall is resistant to ozone, UV aging, and has good oil and chemical corrosion resistance.
 

Visually inspect the appearance of hoses for bulges, cracks, hardening, softening, or signs of surface leakage on a daily basis. Every time the coolant is replaced (usually every 2000 working hours or annually), the condition of the hoses should be thoroughly checked. It is recommended to replace it proactively every 4000-5000 working hours or every two years to prevent aging and failure. When replacing, wait for the engine to completely cool down before operating. First, drain or recover the coolant, loosen the original clamp, and gently remove the old pipe.