CATEngine Parts

1065121 Expansion Valve — Cat 416B 426B

This expansion valve is a critical component of the engine's cooling system, regulating refrigerant flow to maintain optimal operating temperatures. It is manufactured to meet stringent OEM quality standards, ensuring superior performance and durability compared to worn or failing units. Symptoms of a faulty expansion valve can include engine overheating, inconsistent temperature readings, or a loss of cooling capacity.

Expansion Valve – Part No 1065121 – 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 TypeExpansion Valve
MaterialBrass and steel construction
ApplicationEngine cooling system
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

An initial sign of a failing expansion valve may be a noticeable decrease in cooling performance or inconsistent temperature regulation. If left unaddressed, the engine may begin to overheat, leading to reduced efficiency and potential component damage. Continued operation with a faulty valve risks severe damage to the cooling system components.

Installation Tip

Ensure the system is properly evacuated and cleaned before installing the new valve to prevent contamination. Avoid overtightening the valve fittings, as this can damage the threads or the valve body.

Service Note

When replacing the expansion valve, it is advisable to also inspect and potentially replace the receiver-drier and perform a system flush.