CATEngine Parts

305-0402 Expansion Valve — Cat 314Dcr 314Dlcr

This expansion valve is a critical component of the air conditioning and refrigeration system, regulating the flow of refrigerant into the evaporator. It ensures optimal cooling performance by maintaining precise pressure and temperature differentials, unlike a worn valve which can lead to inconsistent cabin temperatures or system inefficiency. Operators may notice a lack of cooling, intermittent cooling, or excessive frost buildup on AC lines when this valve fails.

Expansion Valve – Part No 305-0402 – 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 aluminum alloy
ApplicationAir conditioning system
Service LifeReplace every 5,000 hrs or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing expansion valve include reduced cooling efficiency and inconsistent cabin temperatures. If ignored, the system may struggle to maintain desired temperatures, leading to increased component strain. Prolonged operation with a faulty valve can result in evaporator icing or compressor damage.

Installation Tip

Ensure the AC system is properly evacuated before removing the old valve to prevent refrigerant loss and environmental contamination. Avoid overtightening the fittings, as this can damage the valve body or the connecting lines.

Service Note

When replacing the expansion valve, it is essential to also replace the receiver-drier and consider flushing the AC system to remove any debris.