Hydraulic Main Pump 584-0379 593-3840 627-1302 30R-0199 for E374GC Excavator

This hydraulic main pump, available under part numbers 584-0379, 593-3840, 627-1302, and 30R-0199, is the primary hydraulic power unit engineered specifically for the E374GC excavator hydraulic system. It delivers high-pressure hydraulic oil to drive the boom, arm, bucket, travel, and swing assemblies.

Built with a variable piston structure, precise flow control, wear-resistant alloy materials, and precision machining, this pump offers direct replacement installation and stable output performance for demanding heavy-duty mining and construction applications.

• Internal piston and valve plate wear, leading to pressure drop and weak machine action.
• Internal seal failure resulting in hydraulic oil leakage.
• Abnormal noise and vibration during operation.
• Servo piston sticking, causing flow adjustment failure.
• Housing cracks caused by overload and excessive high pressure.

• Confirm the part number and machine serial number before ordering.
• Verify spline specification, mounting dimensions, and control type.
• Request strict pressure and performance testing before shipment.
• Shockproof wooden packaging is used to prevent transit damage.
• Quality warranty covers manufacturing defects.