Hüdropump HPV118JX-23C 9316778 tüübi jaoks ekskavaatori Hitachi ZX225USLC-5B ZX225USRLC-5B

1. Product Identification & Compatibility
This pump assembly is a 100% direct replacement for the following Hitachi and regional OEM part numbers:

Primary Part Number: HPV118JX-23C

Hitachi OEM Part Numbers: 9316778, 9316776

Additional Reference: YB60000111

Machine Fitment: * Hitachi ZX225USLC-5B

Hitachi ZX225USRLC-5B (Reduced Tail Swing variants)

2. Technical Specifications
Type: Variable Displacement Axial Piston Tandem Pump.

Architecture: Double pump design providing independent flow to both travel and attachment circuits.

Maximum Pressure: Rated for high-pressure operations up to 34.3 MPa (343 bar).

Control System: Integrated with Hitachi’s specialized regulators that communicate with the machine's ECU to optimize fuel consumption and hydraulic power.

Construction: Hardened swash plates and heavy-duty cylinder blocks designed for the high-vibration environment of urban construction.

3. Why Choose the Original Brand?
The ZX225-5B series is a highly calibrated machine. Aftermarket "look-alike" pumps often cause significant issues that an Original Brand pump avoids:

Precise Metering: The USLC-5B is often used in tight spaces near utilities. Original pumps provide the micro-precision movement needed to avoid accidents.

Efficiency Curves: Original pumps are bench-tuned to the torque curve of the Isuzu engine. This ensures that the engine does not "stall" or "hunt" for RPM during heavy simultaneous functions.

Heat Management: Superior metallurgy in the original HPV118 series reduces internal friction, keeping hydraulic oil temperatures lower and extending the life of your seals and cylinders.

4. Critical Installation Requirements
To protect your investment and ensure a successful commissioning, follow these professional protocols:

Case Priming (Mandatory): Fill the pump housing with clean hydraulic oil through the highest case drain port before starting the engine. Running the pump dry for even a few seconds will cause permanent damage to the piston shoes.

System Decontamination: If the previous pump failed due to internal breakage, you must flush the hydraulic tank and clean the oil cooler. Residual metal fragments are the #1 cause of failure in new pumps.

Filtration: Replace the suction strainer and the high-pressure return filter with genuine Hitachi 10-micron elements.

Air Bleeding: After startup, run at low idle for 10 minutes. Slowly cycle each cylinder to its full stroke several times to purge air from the system before applying full load.

5. Frequently Asked Questions (FAQ)
Is the HPV118JX-23C interchangeable with the older -5G or -3 pumps?
No. While the displacement is similar, the regulator settings and port configurations often differ between the Dash-5B (Stage IIIB/Tier 4 Interim) and other series. Always use the specific 23C variant for the 5B machines.

How do I verify if the pump is an Original Brand unit?
Check the data plate for the manufacturer's mark (Hitachi or its OEM partner, typically Hitachi Astemo/Nachi). Original units will also have precision-machined port faces and consistent, high-quality casting.

What is the expected lifespan of this pump?
With proper maintenance and clean ISO VG46 oil, an original Hitachi pump is designed to last 10,000 to 15,000 hours. Frequent oil analysis is recommended to maximize this lifespan.

What is the lead time for shipping?
We typically maintain stock of these units. Global express shipping via DHL or FedEx usually takes 3 to 7 business days to arrive at your site.