9257309 Hydraulic Main Pump for Hitachi ZX330-3 & ZX350-3

The SPARKLING MACHINERY NEW 9257309 Pump;Unit Photo:

Why Choose the SPARKLING 9257309 Pump;Unit?

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •    - Tandem Piston Design: Two high-capacity pumps in one housing allow for efficient power distribution between independent hydraulic circuits.

                                                                    •    - Optimized Regulators: Features advanced horsepower control to prevent engine stalling while maximizing hydraulic speed under heavy loads.

                                                                    •    - Durability: Manufactured with reinforced swashplates and high-grade bearings to extend service life in high-vibration environments.

                                                                    •    - Direct OEM Fit: Built to the exact specifications of part 9257309, ensuring all hydraulic port threads and mounting pilot diameters match Hitachi factory standards.

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Compatible Hitachi Excavator Models

This pump unit is the core hydraulic component for the following models:

Q&A Section

Q1: What is the most common cause of failure for the 9257309 pump?

A: Hydraulic oil contamination (dirt or metal particles) and cavitation (air in the system) are the leading causes. Regularly replacing the hydraulic return filter and the suction strainer is vital for this pump's longevity.

Q2: Does this pump unit include the pilot pump?

A: In many configurations, the 9257309 assembly includes the gear-driven pilot pump mounted on the rear. However, you should always verify if the "unit" is a complete assembly or the main pump only.

Q3: Can I use this pump in a Zaxis-1 or Zaxis-5 series machine?

A: No. While they may look similar, the 9257309 is specifically tuned for the Dash-3's electronic and hydraulic control logic. Newer Dash-5 pumps (like the ZX350-5) have different regulator types and electrical connectors.

About SPARKLING MACHINERY:
   - Founded in 2013, SPARKLING focuses on high-quality excavator parts across hydraulics, undercarriage, engines and electrical systems. We prioritize stability, precision and continuous service, offering worldwide distribution, tailored solutions and strict QC to help customers reduce cost and increase uptime.

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