XCMG Loader Spare: Upper Radiator Hose 250900401 | Cooling Circuit Pipe

An upper radiator hose is the pipe connecting the top outlet of the radiator to the inlet port on the engine block​ within the engine cooling loop, working together with the lower radiator hose to form a closed coolant circulation path. Driven by the water pump, coolant absorbs heat as it passes through the engine, returns to the radiator via the upper hose to dissipate heat, and is then pumped back into the engine—completing the heat-exchange cycle. Its sealing integrity and flow smoothness directly affect engine heat dissipation efficiency and operational safety.

Operating in harsh field conditions, the upper radiator hose is exposed long-term to high temperature, vibration, oil contamination, and mud-water washing. Rubber material tends to age and crack, hose clamps may loosen, and the inner wall can delaminate—making it one of the more leak-prone components in the cooling system. When symptoms such as elevated water temperature, seepage at joints, or surface cracking appear, inspection and timely replacement are necessary to avoid engine overheating and cylinder scoring due to coolant loss.

This 250900401​ is associated with drawing number LW321F(TD).1-2. The prefix LW321F​ corresponds to XCMG's 3.2-ton-class wheel loader (powered by a Yuchai YC6108G engine rated at 92 kW, with enlarged fan diameter and radiator surface area ), but whether it is exclusively used on this model, and the exact meaning of the suffix "TD", cannot be directly confirmed from publicly available sources and should be verified through XCMG's parts system or catalog numbering. XCMG's official spare-parts service notes that construction machinery encompasses a vast range of components, and entering the part number, model, or keyword enables quick lookup of the required genuine spare parts .

When replacing the upper radiator hose, work only after the engine has completely cooled. First drain the coolant, loosen the clamps at both ends, then remove the old hose and inspect the joint inner walls for corrosion or deformation. When installing the new hose, ensure the routing matches the original without twisting or kinking, tighten the clamps to the torque specified in the service manual, then refill with coolant, bleed the system, and check for leaks after startup.