CATEngine Parts

3v0258 Expansion Valve — Cat 936F 938F

This expansion valve is a critical component of the engine's cooling system, regulating refrigerant flow to maintain optimal operating temperatures. It ensures proper heat exchange by precisely controlling the amount of refrigerant entering the evaporator, preventing both freezing and overheating. A failing valve can lead to inconsistent cabin temperatures, reduced cooling efficiency, or even system damage.

Expansion Valve – Part No 3v0258 – 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
ApplicationEngine cooling system
Service LifeReplace every 4,000 hours or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

An initial sign of a failing expansion valve is inconsistent temperature control within the cabin. If ignored, the system may begin to overwork, leading to reduced cooling performance and increased energy consumption. Ultimately, this can result in damage to other cooling system components due to prolonged stress.

Installation Tip

Ensure the system is properly evacuated and cleaned before installation 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 crucial to inspect the receiver-drier and the entire refrigerant circuit for any signs of blockage or contamination.