CATEngine Parts

104-8097 Main Relief Valve — Cat Excavator E307 E308C

This is a Main Relief Valve, a critical component in the hydraulic system responsible for regulating and limiting maximum system pressure. It is manufactured to precise specifications to ensure reliable operation and prevent damage from over-pressurization, unlike a worn valve that may stick or leak. Symptoms of a failing valve include sluggish hydraulic functions, loss of power, or erratic pressure fluctuations.

Main Relief Valve – Part No 104-8097 – 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 TypeMain Relief Valve
MaterialHardened steel
ApplicationMain hydraulic control system
Service LifeReplace if leaking or pressure is inconsistent
CompatibilityCAT Excavator E307, E308C
ConditionNew — OEM specification aftermarket

Failure Symptoms

A failing main relief valve may initially cause sluggish or weak hydraulic performance. If left unaddressed, the valve could stick open, leading to a loss of system pressure and inability to perform heavy work, or stick closed, causing dangerous over-pressurization of the hydraulic system.

Installation Tip

Always relieve hydraulic system pressure before attempting to remove or install the relief valve. Ensure the valve seat is clean and free of debris to prevent leaks.

Service Note

Inspect the hydraulic filter and oil for signs of contamination or degradation when replacing the main relief valve.