CATEngine Parts

360-4599-129-8030 Hydraulic Relief Valve — Cat

This hydraulic relief valve is designed to regulate and limit pressure within the hydraulic system, protecting components from over-pressurization. It is manufactured to precise specifications, ensuring reliable operation and consistent pressure control unlike a worn valve that may stick or leak. Operators may notice erratic hydraulic function, loss of power in hydraulic implements, or a whining noise from the hydraulic pump if this valve is failing.

Hydraulic Relief Valve – Part No 360-4599-129-8030 – 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 TypeHydraulic Relief Valve
MaterialSteel and Brass
ApplicationHydraulic System Pressure Control
Service LifeReplace as needed based on performance
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial symptoms of a failing relief valve include inconsistent hydraulic implement speed or reduced lifting capacity. If left unaddressed, the valve may stick open, leading to a complete loss of hydraulic pressure and functionality. Continued operation with a faulty relief valve can cause premature wear on the hydraulic pump due to constant bypassing.

Installation Tip

Before installation, ensure the hydraulic system is properly depressurized to prevent injury and fluid loss. Avoid cross-threading the valve into its port, as this can damage the threads and cause leaks.

Service Note

Inspect the hydraulic filter and fluid condition; replace the filter and consider a fluid change if contamination is suspected.