9275113 9275112 hydraulic pump for Hitachi ZX170W-3 excavator
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Hitachi HPV118HW-25A 9275341 9274600 hydraulic pump for Hitachi ZX210W-3 ZX220W-3 ZX250W-3 excavator
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These part numbers are the "Original Brand" specifications for the Dash-3 wheeled excavator series:
Primary OEM Part Number: 9275113
Interchangeable Part Number: 9275112
Machine Fitment: Hitachi ZX170W-3
Condition: Original Brand New (Genuine Hitachi/Nachi Architecture)
2. Technical Specifications & Performance
Pump Type: Tandem Variable Displacement Axial Piston Pump.
System Integration: Specifically tuned for the HIOS III system, which optimizes hydraulic oil flow based on joystick input and engine load.
Operating Pressure: Rated at 34.3 MPa (343 bar) for standard work and up to 36.3 MPa (363 bar) with power boost engaged.
Wheeled Series Logic: Features dedicated regulators that balance flow between the transmission (for travel) and the front-end attachments (for digging).
3. Why Choose the Original Brand?
For a 17-ton wheeled excavator, the precision of the main pump is critical for both safety and productivity:
Travel Stability: Wheeled excavators require perfectly balanced flow to ensure stable tracking at high road speeds. Original pumps prevent the "drift" or "wandering" often experienced with uncalibrated aftermarket units.
Fuel Efficiency: The original 9275113 regulators are factory-set to the specific power curve of the Isuzu engine, reducing fuel consumption by up to 10% compared to non-OEM alternatives.
Component Durability: Original units use high-grade hardened alloys for the cylinder block and valve plates, significantly reducing the risk of internal erosion (cavitation) during high-pressure cycles.
4. Professional Installation Protocol
To ensure the long-term reliability of your new pump, follow these mandatory steps:
Case Priming: MANDATORY. Fill the pump housing with clean hydraulic oil through the top case drain port before starting the engine. A "dry start" will destroy the internal components in seconds.
System Decontamination: If the previous pump failed mechanically (sending metal into the oil), you must flush the hydraulic tank and clean the oil cooler.
Filtration: Replace the suction strainer and the high-pressure return filter with genuine Hitachi elements. Use ISO VG46 anti-wear hydraulic oil.
Air Purge: After startup, run at low idle for 10 minutes. Slowly cycle all cylinders and the travel motor to their limits to purge any trapped air.
5. Frequently Asked Questions (FAQ)
Are the 9275113 and 9275112 interchangeable? Yes. 9275113 is typically the most recent engineering revision, offering improved internal seal longevity over the 9275112 version.
How can I verify the pump is an "Original Brand"? Genuine pumps feature a factory data plate with the Hitachi/Nachi logo, specific serial numbers, and high-quality casting marks. They are shipped with heavy-duty protective port plugs.
How long does shipping take for this model? We prioritize "Machine Down" situations. Global express shipping via DHL, FedEx, or UPS usually takes 3 to 7 business days to arrive at your site.
Does this pump include the regulators? Yes, our Original Brand New pumps are sold as complete assemblies, including the pre-calibrated LS (Load Sensing) and PC (Pressure Compensation) regulators.