OEM-specification Komatsu Cooling Component. Part number 3520212. Compatible with 385B, 5090B, 621g, 623g, 627F, 627g, 657B, 735, 740, 834g, 980g, 980g ii, 988g, D350e ii, D400e ii, D8R ii; Engine: 3406e, 3456.
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.