CATEngine Parts

1878391 Oil Cooler — Cat 933C 939C

This is an oil cooler, a critical component of the engine's lubrication system responsible for dissipating excess heat from the engine oil. It functions by circulating engine coolant through a separate circuit to absorb heat from the oil before it returns to the engine. A failed oil cooler can lead to overheating of the engine oil, resulting in reduced lubrication effectiveness and potential engine damage. Operators may observe a significant increase in oil temperature readings or a decrease in oil pressure.

Oil Cooler – Part No 1878391 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
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

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

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 or Stainless Steel
ApplicationEngine lubrication system cooling
Service LifeReplace every 4,000-6,000 hrs or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A leaking or clogged oil cooler may initially present as a gradual increase in engine oil temperature. If ignored, the oil can overheat, leading to degraded lubrication properties and increased engine wear. In severe cases, prolonged operation with a faulty oil cooler can cause significant internal engine damage due to insufficient lubrication.

Installation Tip

Thoroughly flush the engine's cooling system to remove any debris or contaminants before installing the new oil cooler. Ensure all sealing surfaces are clean and that new O-rings or gaskets are used for a leak-free seal.

Service Note

When replacing the oil cooler, it is recommended to also replace the engine oil and oil filter, and to flush the cooling system.