Hitachi 9275110 9275109 hydraulikpumpe til Hitachi ZX140W-3 ZX145W-3 gravemaskiner
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These part numbers are direct "bolt-on" replacements for the Hitachi Dash-3 wheeled series:
Primary OEM Part Numbers: 9275110, 9275109
Machine Fitment: * Hitachi ZX140W-3
Hitachi ZX145W-3
Pump Series: HPV series (High-pressure Variable displacement)
Condition: Original Brand New
2. Technical Features for Wheeled Excavators
Wheeled excavators (W-series) have different hydraulic profiles compared to tracked units. These pumps feature:
Independent Travel/Work Logic: The internal regulators are designed to provide stable flow for the transmission during travel while maintaining high response for the boom and arm during digging.
HIOS III Regeneration: The pump works with the control valve to recirculate oil from the cylinder rod side to the head side, increasing arm speed and reducing engine load.
High-Pressure Durability: Rated for continuous operation at 34.3 MPa (343 bar), ensuring the machine maintains its rated breakout force throughout the shift.
3. Why Choose the Original Brand?
For the ZX140W-3/ZX145W-3, using an Original Brand pump is critical for several technical reasons:
Travel Smoothness: Aftermarket pumps often lack the precise low-flow control needed for smooth "inching" during travel, which can lead to jerky movements and drivetrain wear.
Engine-Pump Harmony: The regulators are factory-calibrated to the power curve of the Isuzu engine. This prevents the engine from "bogging down" when multiple hydraulic functions are engaged simultaneously.
Longevity in Urban Duty: Wheeled excavators often perform high-cycle urban work. Original metallurgy in the cylinder blocks and valve plates resists cavitation and heat-soak better than budget alternatives.
4. Critical Installation Protocol
To protect your investment and maintain the manufacturer's warranty, please follow these steps:
Case Priming (Mandatory): Fill the pump housing with clean hydraulic oil through the highest case drain port before starting the engine. A "dry start" will destroy the internal bronze slippers and swash plate in seconds.
System Decontamination: If the previous pump failed mechanically (sending metal fragments into the system), 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 10-micron elements. Use ISO VG46 anti-wear hydraulic oil.
Air Purging: After startup, run at low idle for 10 minutes. Slowly cycle all cylinders to their full stroke to purge trapped air from the circuit.
5. Frequently Asked Questions (FAQ)
Are the 9275110 and 9275109 interchangeable?
Yes, they are generally interchangeable within the ZX140W-3/ZX145W-3 series, though 9275110 is often the more recent engineering revision. Always verify with your Machine Serial Number.
What are the signs that my pump is failing?
Common symptoms include increased cycle times (sluggishness), excessive hydraulic noise (whining), and the machine struggling to travel up slight inclines despite the engine running at full RPM.
How do I verify the pump is an "Original Brand"?
Look for the factory data plate with the manufacturer’s branding (Hitachi or its OEM partner, such as Hitachi Astemo). Genuine units feature precise machining and high-quality protective port plugs.
How long is the shipping time?
We typically stock these pumps for immediate dispatch. Global express shipping via DHL, FedEx, or UPS usually takes 3 to 7 business days to reach your location.