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Heavy-Duty Main Relief Valves & Hydraulic Pressure Control Spares
Special Offers
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Excavator Parts PC400-6 Relief Valve 723-40-50400
Excavator Parts PC400-6 Relief Valve 723-40-50400 Part Number: 723-40-50400 Application: Excavator Parts PC400-6 Condition: New Aftermarket Parts In Stock Key Features: Direct-fit replacement: No modification required for installation. Stable operation: Ensures consistent performance under standard...Regular price $ 79 -
Excavator EX200-5 EX270-5 EX220-5 Main Relief Valve 4386637
Excavator EX200-5 EX270-5 EX220-5 Main Relief Valve 4386637 Part Number: 4386637 Application: EX200-5 EX270-5 EX220-5 Condition: New Aftermarket Parts In Stock Key Features: Direct-fit replacement: No modification required for installation. Stable operation: Ensures consistent performance...Regular price $ 140 -
EC210 EC210B Relief Valve VOE14524582 14524582 EC290 EC290B Service Valve VOE14552089 14552089
EC210 EC210B Relief Valve VOE14524582 14524582 EC290 EC290B Service Valve VOE14552089 14552089 Part Number: VOE14524582 14524582 Application: EC210 EC210B Condition: New Aftermarket Parts In Stock Key Features: Direct-fit replacement: No modification required for installation. Stable...Regular price $ 65 -
Main Relief Valve171-0060 1710060 for Caterpillar Excavator E345B E345C
Main Relief Valve171-0060 1710060 for Caterpillar Excavator E345B E345C Part Number: 171-0060 1710060 Application: E345B E345C Condition: New Aftermarket Parts In Stock Key Features: Direct-fit replacement: No modification required for installation. Stable operation: Ensures...Regular price $ 89 -
E330C E320C Valve 1038177 103-8177 Main Relief Valve 103-8177 1038177
E330C E320C Valve 1038177 103-8177 Main Relief Valve 103-8177 1038177 Part Number: 103-8177 1038177 Application: E330C E320C Condition: New Aftermarket Parts In Stock Key Features: Direct-fit replacement: No modification required for installation. Stable operation: Ensures...Regular price $ 98 -
Control Relief Valve 4289602 AT154800 for HITACHI EX200-2 EX200-3 EX220-2 EX300-3
Control Relief Valve 4289602 for HITACHI EX200-2 EX200-3 EX220-2 EX300-3 Part Number: 4289602 AT154800 Application: for HITACHI EX200-2 EX200-3 EX220-2 EX300-3 Condition: New Aftermarket Parts In Stock Key Features: Direct-fit replacement: No modification required for...Regular price $ 99
If your excavator is losing power under load or your hydraulic system is overheating, a worn replacement relief valve is often the root cause. As the primary safety and pressure regulator, a high-precision main relief valve protects your pumps and cylinders by diverting excess oil back to the tank once the set pressure is reached. BeeSpareParts stocks a wide range of cartridge and bolt-on relief valves built to maintain factory-spec breakout forces in harsh environments.
Hydraulic pressure issues are often linked to other components. If adjusting the valve doesn't restore power, we recommend inspecting your for internal wear, or browsing our to stop internal pressure bypass. Our relief valve assemblies feature hardened steel poppets and precision-wound springs, providing a cost-effective alternative to expensive original dealer parts.
Whether you need a main relief valve for an excavator, a port relief valve for a specific circuit, or a pressure control unit for a loader, our parts are factory-tested for accurate opening and closing pressures and are ready for fast international shipping. Regain your digging power—order your heavy-duty hydraulic valve solution today.
Fits for:
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Engine & Model Series: 4BT, 6BT, 4D95, 6D102, S6K, S4K, J05E, J08E, 4HK1, 6HK1.
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Equipment Models: ZX, PC, SK, EC, EX series excavators, backhoes, and mobile hydraulic systems.