KomatsuCooling System

426-03-21370 Oil Cooler — Komatsu HD785 WA600

OEM-specification Komatsu Oil Cooler. Part number 426-03-21370. Compatible with Komatsu Hd785 7 Wa600 3 Wd600 3 Wa600 3D. Fits: WA6003, WA6003D.

Oil Cooler – Part No 426-03-21370 – Komatsu Spare Part
Part Specifications
BrandKomatsu
CategoryCooling System
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Full shipping information on regional pages · Air freight 2–12 days · GST invoice for India

Installation & Application Notes

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.