Swing Hydraulic Pump Assembly 144-4332 144-4333 for E5110B Large Mining Excavator

This swing hydraulic pump, with part numbers 144-4332 and 144-4333, is the hydraulic power unit specially designed for the E5110B excavator swing system. It supplies high-pressure hydraulic oil to drive the swing motor assembly. Featuring a variable piston structure, precise flow control, wear-resistant alloy materials, and precision machining, it 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 dimensions, and control type
• Request strict pressure and performance testing before shipment
• Shockproof wooden packaging to avoid transit damage
• Quality warranty for manufacturing defects