CATCooling System

265-3566 Oil Cooler — Cat Excavator 321C

This Oil Cooler is a vital heat exchanger within the engine's lubrication system, responsible for dissipating excess heat from the engine oil. It ensures the oil maintains its optimal viscosity and lubricating properties, unlike a worn unit that may have internal blockages or external leaks, compromising cooling efficiency. Operators may notice a significant increase in oil temperature, potential loss of oil pressure, or visible oil leaks when this cooler begins to fail.

Oil Cooler – Part No 265-3566 – CAT Spare Part
Part Specifications
BrandCAT
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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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.

Part TypeOil Cooler
MaterialAluminum and Steel
ApplicationEngine Lubrication System
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing oil cooler might be an elevated oil temperature warning light or gauge reading. If ignored, the oil can break down, leading to increased friction and wear on engine components. Continued operation with a faulty oil cooler risks severe engine damage due to inadequate lubrication and overheating.

Installation Tip

Ensure all O-rings and seals are properly lubricated and seated before installing the oil cooler. Do not reuse old seals, as they may not provide an adequate barrier against leaks.

Service Note

When replacing the oil cooler, it is recommended to inspect the engine oil filter and oil for any signs of contamination or metal debris.