The Case Construction Genuine 47513509 Main Relief Valve is a critical safety and performance component used in Walvoil hydraulic control valve assemblies fitted on Case backhoe loaders. The main relief valve regulates and limits maximum hydraulic system pressure, preventing overload, component damage and unsafe operating conditions.

Engineered to Case Construction’s strict OEM specifications, this relief valve opens precisely at the calibrated pressure to divert excess oil back to the tank. This ensures consistent hydraulic performance while safeguarding pumps, hoses, cylinders and valve bodies from pressure spikes.

Manufactured using hardened, wear-resistant materials with precision-ground internal surfaces, the valve delivers reliable pressure control, long service life and stable operation even under continuous heavy-duty cycles typical of construction machinery.

Functional Role

• Maintains safe maximum system pressure
• Protects hydraulic pump and downstream components
• Ensures smooth, controlled machine response
• Prevents overheating caused by over-pressurization

Replaces / Obsolete Part Numbers

This genuine part supersedes:

• XCAR120313
• X007211120

Key Features & Benefits

• Genuine Case Construction / CNH OEM component
• Part Number: 47513509
• Designed for Walvoil hydraulic control valves
• Accurate and stable pressure regulation
• Precision-engineered spring and valve seat
• High resistance to wear, contamination and fatigue
• Improves hydraulic system safety and reliability
• Direct OEM replacement – no modification required

Applications

Used in Case backhoe loaders equipped with Walvoil control valves, supporting multiple machine functions by controlling overall hydraulic system pressure across:

• Loader circuits
• Backhoe circuits
• Auxiliary hydraulic functions

Why Use a Genuine OEM Main Relief Valve?

• Maintains factory pressure calibration
• Prevents premature pump and valve failure
• Reduces downtime and costly hydraulic repairs
• Ensures operator safety and machine longevity