The 723-30-90101 Main Relief Valve is a precision hydraulic control component designed for PC100-6, PC128UU-1 and PC130F-7 excavators.

Installed in the hydraulic system, the main relief valve helps control maximum system pressure and protects hydraulic components from excessive pressure. Stable pressure regulation is essential for reliable excavator operation, especially under demanding working conditions.

This replacement valve is manufactured for accurate fitment, dependable sealing and consistent hydraulic performance.

Key Features

• Part Number: 723-30-90101
• Compatible with PC100-6, PC128UU-1 and PC130F-7 excavators
• Designed for main hydraulic pressure regulation
• Helps protect the hydraulic system from excessive pressure
• Precision-machined metal construction
• Stable pressure control performance
• Accurate threaded connection
• Reliable sealing performance
• Durable construction for heavy-duty applications
• Suitable for direct replacement
• Professional inspection before shipment
• Wholesale and international supply available

Product Specifications

Please confirm the excavator model, machine serial number and original part number before ordering.

Compatible Excavator Models

This 723-30-90101 main relief valve is commonly used for:

• PC100-6
• PC128UU-1
• PC130F-7

Compatibility may vary depending on machine serial number, hydraulic configuration and production year.

For accurate matching, please provide your machine model, serial number or photos of the original relief valve.

Stable Hydraulic Pressure Control

The main relief valve is an important safety and control component in the excavator hydraulic system.

Its main functions include:

• Limiting maximum hydraulic system pressure
• Protecting pumps, valves and hydraulic components
• Helping prevent pressure overload
• Supporting stable hydraulic operation
• Maintaining consistent working pressure
• Reducing the risk of component damage caused by excessive pressure

A properly operating relief valve is important for both machine performance and hydraulic system protection.

Precision Machining

The valve is manufactured with attention to critical dimensions, threaded sections and sealing surfaces.

Precision machining helps provide:

• Accurate installation
• Proper fit with the hydraulic system
• Reliable sealing
• Stable internal valve movement
• Consistent pressure regulation
• Reduced risk of leakage

Durable Construction

Excavator hydraulic systems operate under high pressure, vibration, heat and continuous working loads.

This main relief valve features a robust metallic construction designed to provide dependable performance in construction, earthmoving, mining and other heavy-duty operating environments.

Common Replacement Symptoms

A worn or faulty main relief valve may cause symptoms such as:

• Weak hydraulic power
• Low system pressure
• Excessive hydraulic pressure
• Slow excavator movement
• Abnormal hydraulic noise
• Unstable hydraulic operation
• Hydraulic overheating
• Pressure fluctuation
• Reduced digging performance

Because similar symptoms can also be caused by hydraulic pumps, control valves or other components, professional diagnosis is recommended before replacement.

Applications

The 723-30-90101 main relief valve is suitable for:

• Excavator hydraulic system repair
• Main relief valve replacement
• Hydraulic pressure system maintenance
• Excavator overhaul
• Construction machinery servicing
• Excavator repair workshops
• Heavy equipment dealers
• Parts distributors
• Fleet maintenance

Why Choose JISION Excavator Parts?

JISION supplies excavator replacement parts for repair companies, dealers, distributors and equipment owners worldwide.

We provide:

• Wide range of excavator parts
• Stable product quality
• Professional model matching
• Part number verification
• Hydraulic parts supply
• Engine parts supply
• Electrical parts supply
• Export packaging
• Wholesale support
• Fast quotation service
• International shipping solutions

Our product range includes hydraulic valves, relief valves, pumps, solenoid valves, controllers, sensors, engine parts and other excavator replacement components.

Quality Inspection

Before shipment, the main relief valve can be checked for:

• Product appearance
• Thread condition
• Machined surfaces
• Valve body condition
• Sealing surfaces
• Port condition
• Overall dimensions
• Packaging condition

Careful inspection helps reduce installation issues and improves shipment reliability.

Ordering Information

To receive an accurate quotation, please provide:

• Excavator model
• Part number
• Machine serial number if available
• Photos of the original valve
• Required quantity
• Destination country

Our team can assist with compatibility confirmation before shipment.

FAQ

What is the part number of this main relief valve?

The part number is 723-30-90101.

Which excavator models are compatible?

It is commonly used for PC100-6, PC128UU-1 and PC130F-7 excavators.

What does the main relief valve do?

The main relief valve helps control maximum hydraulic system pressure and protects the hydraulic circuit from excessive pressure.

Is this a direct replacement part?

It is designed as a replacement component. We recommend confirming the part number, excavator model and original valve appearance before purchase.

Can you help confirm compatibility?

Yes. Send us your excavator model, serial number, part number or original product photos, and we can assist with matching.

Do you support wholesale orders?

Yes. We support excavator repair shops, dealers, distributors and bulk purchasing customers.

Can you ship internationally?

Yes. International shipping options can be arranged according to destination, order quantity and delivery requirements.