KomatsuCooling System

2N3221 Gear (13 Teeth) — Komatsu 641B 772

OEM-specification Komatsu Gear (13 Teeth). CTP aftermarket replacement. Part number 2N3221. Compatible with 641B, 772, 777, 992, D10, D348, D353C, D398, D399, D9G, D9H, G379, G399; Engine: D346, D348, D349, D353.

Gear (13 Teeth) – Part No 2N3221 – 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.