Hydraulic Main Pump 251-8030 251-8031 207-4708 for M315D Wheel Excavator

This hydraulic main pump, available under part numbers 251-8030, 251-8031, and 207-4708, is the primary hydraulic power unit engineered specifically for the M315D wheel excavator hydraulic system. It delivers high-pressure hydraulic oil to drive the boom, arm, bucket, travel, and swing assemblies.

Built on a variable piston structure, the pump combines precise flow control, wear-resistant alloy materials, and precision machining. It is designed for direct replacement installation and delivers stable output performance under heavy-duty construction working conditions.

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

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