Hydraulic Main Pump 369-9655 369-9656 for E374D 390F L Excavator

This hydraulic main pump, with part numbers 369-9655 and 369-9656, is the primary hydraulic power unit specially engineered for the hydraulic system of E374D and 390F L excavators. It supplies high-pressure hydraulic oil to drive the boom, arm, bucket, travel, and swing assemblies.

The pump adopts a variable piston structure, 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 mining and construction working conditions.

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

• 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 avoid transit damage
• Quality warranty covering manufacturing defects