CATEngine Parts

123-7557 Relief Valve — Cat

This relief valve is a safety device designed to regulate and limit pressure within a hydraulic or fuel system, preventing over-pressurization and potential component damage. It is engineered to precise specifications, ensuring it opens at the correct pressure threshold, unlike a worn valve that may stick open or closed. Operators might notice erratic hydraulic system performance, a drop in pressure, or unusual noises if this valve fails to function correctly.

Relief Valve – Part No 123-7557 – 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
MaterialHardened steel, brass
ApplicationHydraulic system, fuel system
Service LifeReplace every 5,000 hrs or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first indication of a problem might be a loss of system pressure or inconsistent operation of hydraulic components. If the valve sticks open, pressure will be too low, affecting performance; if it sticks closed, pressure can build excessively, potentially damaging seals or pumps. Continued operation with a faulty relief valve risks severe damage to the hydraulic system.

Installation Tip

Ensure the valve seat in the manifold or housing is perfectly clean and free of debris before installing the new valve. Do not use excessive force when threading the valve in, as this can damage the threads.

Service Note

When replacing a relief valve, it is essential to inspect the hydraulic fluid for contamination and consider replacing the filter.