OEM-specification Komatsu Cooling Component. Part number 423-03-21101-423-03-21110. Compatible with Komatsu Wheel Loader Wa350 3A Wa380 3 Wa380 40 Wa400 3A S Wa420 3.
Always verify with serial number before ordering.
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Flush cooling system with distilled water before refilling. Use pre-mixed coolant — never plain water, which causes corrosion. Pressure-test system after any cooling repair. Check thermostat by immersing in hot water — should open at rated temperature.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.
