Belparts ZX300 ZX300-3 Hydraulic Main Pump 9122780 9136850 For Hitachi Excavator Pump

Belparts ZX300 ZX300-3 hydraulic main pump 9122780 9136850 for Hitachi excavator pump

The hydraulic pump converts mechanical energy into hydraulic energy to power the excavator's hydraulic system. When the engine drives the pump shaft to rotate, the internal pistons or gear sets create oil suction and compression processes, forming a high-pressure oil flow. Belparts hydraulic pumps feature variable displacement design that automatically adjusts output flow according to load requirements, achieving high energy efficiency.

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Piston pumps are the "aristocrats" of excavator hydraulic systems and the most common choice for medium and large excavators. They use multiple pistons moving reciprocally within cylinders to alter working volume, achieving oil intake and discharge. Based on piston arrangement, they're mainly categorized as axial or radial piston pumps.

Axial piston pumps dominate modern excavators, with pistons arranged parallel to the drive shaft. When the swashplate (or tilt plate) angles relative to the drive shaft, the pistons reciprocate during rotation. Greater angles create longer piston strokes and larger pump displacement. Modern variable displacement piston pumps can adjust the swashplate angle in real time to modify output flow for different working conditions.

Piston pumps excel in handling extremely high working pressures (over 40MPa), offering high efficiency, precise flow control, and easy variable displacement adjustment. Their disadvantages include complex structure, demanding manufacturing precision, high cost, and extreme sensitivity to oil cleanliness. These high-performance piston pumps enable modern excavators to achieve astonishing precision and efficiency in operation.

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• Packaging Details:

• 1.According to orders, pack the spare parts one by one by oil paper;

• 2.Put them into small carton boxes one by one;

• 3.Put the packed small carton boxes into bigger carton boxes one by one;

• 4.Put the bigger carton boxes into wooden boxes if necessary especially for the shipments by sea.

• 5. Goods is packed with oil paper and plastic bags inside

• 6.Using wooden case package.

• 7.We support the custom-made demand for package

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