CATEngine Parts

330-3979 Relief Valve — Cat 3054C 416E

This is a Relief Valve, designed to regulate and limit the maximum pressure within a hydraulic or engine system, protecting components from over-pressurization. Manufactured to meet exact OEM specifications, it ensures reliable pressure control unlike a worn valve that may stick open or closed, leading to system malfunction. Operators may observe erratic hydraulic operation, sluggish movement, or audible system groaning when this valve begins to fail.

Relief Valve – Part No 330-3979 – 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 TypeRelief Valve
MaterialSteel alloy
ApplicationHydraulic system pressure regulation
Service LifeReplace if pressure issues are detected or valve operation is suspect
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A failing relief valve might initially manifest as inconsistent hydraulic system performance, such as slow or jerky movements. If the valve becomes stuck open, the system will not build adequate pressure, leading to a lack of operational force. If it sticks closed, the system could experience dangerously high pressures, potentially damaging components.

Installation Tip

Before installing, ensure the valve seat in the hydraulic block is clean and free from any debris or old sealant. Be careful not to cross-thread the valve when screwing it into its port.

Service Note

Inspect the hydraulic fluid for contamination and check the hydraulic filter condition when replacing the relief valve.