Гидронасос Hitachi HPV145HW 9256100 для экскаватора Hitachi ZX330 ZX330-3 ZX350-3 ZX330LC-3 ZX350H-3

1. Product Identification
Pump Model: HPV145HW

Common Hitachi OEM Part Numbers: 9257348, 9262312, 9260893, 9295671

Machine Compatibility:

Hitachi ZX330 / ZX330-3 / ZX330LC-3

Hitachi ZX350-3 / ZX350LC-3

Hitachi ZX350H-3 / ZX350LCH-3 (Heavy-Duty/Mining)

Hitachi ZX350K-3 / ZX350LCK-3 (Demolition)

Condition: Original Brand New / OEM Specification

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

Displacement: 145 cc/rev x 2

Max Operating Pressure: 34.3 MPa (343 bar)

Power Boost Pressure: 36.3 MPa (363 bar)

System Integration: Calibrated for HIOS III hydraulics and Isuzu 6HK1 engine torque curves.

3. Key Installation Protocols
Case Priming: Fill the pump housing completely with clean hydraulic oil via the highest case drain port BEFORE engine startup to prevent dry-run damage.

System Flush: If replacing a mechanically failed pump, thoroughly flush the hydraulic tank, main control valve, and oil cooler lines to remove residual debris.

Filtration: Replace the suction strainer, pilot filter, and high-pressure return elements with genuine 10-micron filters. Use clean ISO VG46 oil.

Air Purge: Run the engine at low idle for 10 minutes post-installation. Cycle all cylinders slowly to their limits without load to bleed trapped air.

4. Shipping & Logistics
Packaging: Secured inside a heavy-duty, steel-banded export wooden crate with moisture barriers and protective port plugs.

Transit Time: Global express air freight via DHL/FedEx/UPS typically delivers within 3 to 7 business days.

5. Critical Installation Requirements
Case Priming (Mandatory)
Before starting the engine, manually fill the pump housing with clean hydraulic oil through the highest case drain port. Running an axial piston pump dry for even a few seconds will instantly destroy the piston shoes and swash plate.

Complete Hydraulic Decontamination
If the previous pump suffered a mechanical breakdown, you must flush the hydraulic tank, clean the main control valve bank, and thoroughly flush the oil cooler lines. Residual metal debris will act like liquid sandpaper and destroy the new pump.

Filtration & Fluid Upgrade
Always replace the suction strainer, the pilot filter, and the high-pressure return elements with genuine 10-micron filters. Refill the system using only clean, high-grade ISO VG46 anti-wear hydraulic fluid.

Air Purge Routine
On initial startup, run the engine at a low idle for 10 minutes. Slowly cycle all cylinder functions to their full extension limits without any load to safely bleed trapped air pockets back into the reservoir.

6. Frequently Asked Questions (FAQ)
Q: Are the pumps for the ZX330-3 and the heavy-duty ZX350H-3 exactly the same?
A: Mechanically, the pump body frame (HPV145HW) is identical. However, depending on the specific machine application (such as the "H" heavy-duty mining spec or "K" demolition spec), the regulator settings or pressure relief limits may be configured differently. Always provide your Machine Serial Number to ensure the factory regulator calibration matches your application.

Q: What are the primary indicators that my HPV145HW pump is failing?
A: The most common symptoms include a noticeable increase in overall cycle times (sluggish performance across all functions), the engine loading down or stalling when joysticks are fully deflected, or a loud, high-pitched whining noise (cavitation or internal component wear) coming from the pump compartment.

Q: How is a pump of this size packaged and shipped safely?
A: Due to the substantial weight of the 145cc tandem assembly, the pump is treated with rust-preventative oil, capped with heavy-duty port plugs, wrapped in a moisture barrier, and securely bolted inside a reinforced, steel-banded export wooden crate to prevent any movement or impact damage during transit.

Q: Does the pump come with the regulators pre-installed?
A: Yes, our Original Brand New assemblies come complete with the pre-calibrated regulators and proportional solenoid valves factory-tested and ready for drop-in installation.