CATEngine Parts

105-9509 A C Expansion Valve — Cat 320B

This AC expansion valve regulates refrigerant flow into the evaporator, controlling the cooling system's operation. It is manufactured to meet stringent OEM standards, ensuring superior performance compared to a worn valve that may leak or stick. Operators may notice reduced cooling efficiency, inconsistent cabin temperatures, or the AC system cycling improperly when this component fails.

A C Expansion Valve – Part No 105-9509 – 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 TypeAC Expansion Valve
MaterialBrass and steel components
ApplicationAir conditioning system
Service LifeReplace every 3,000 hrs or 3 years
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing AC expansion valve include reduced cooling performance and inconsistent cabin temperatures. If ignored, the system may struggle to maintain a comfortable environment, leading to potential compressor damage due to improper pressure regulation. Continued operation with a faulty valve can result in complete loss of cooling and increased wear on other AC components.

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 threads.

Service Note

When replacing the expansion valve, it is recommended to also inspect and potentially replace the receiver-drier and filter drier.