Swing Hydraulic Pump 593-3840 593-3841 for E374 E395GC Excavator

The swing hydraulic pump with part numbers 593-3840 and 593-3841 is a hydraulic power unit specially designed for the swing system of E374 and E395GC excavators. It supplies high-pressure hydraulic oil to drive the swing motor assembly.

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 heavy-duty mining and construction working conditions.

• Internal piston and valve plate wear, causing pressure drop and weak swing 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