Hydraulic Main Piston Pump 214-3243 221-3667 221-3668 for D5G D4G Dozer

This hydraulic main piston pump, available under part numbers 214-3243, 221-3667, and 221-3668, is the primary hydraulic power unit specifically engineered for the hydraulic systems of D5G and D4G dozers. It delivers high-pressure hydraulic oil to drive the blade, tilt, and travel assemblies.

Built with a variable piston structure, the pump features precise flow control, wear-resistant alloy materials, and precision machining. It is designed for direct replacement installation and provides stable output performance under heavy-duty construction and earthmoving 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 prevent transit damage
• Quality warranty covering manufacturing defects