ZX330-3 main pump flow declining or case drain overheating despite normal engine speed? A worn 9256100 HPV145 main pump assembly loses volumetric efficiency across both sections simultaneously, reducing all ZX330-3 circuit flow below working capacity. RITO supplies this complete HPV145 pump assembly to restore full ZX330-3 hydraulic system output.
Item NO.:
9256100Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock9256100 Hydraulic Main Pump Assembly (HPV145) for Hitachi ZX330-3, ZX330-5G, ZX350H-3 and EX300-3 excavators. Complete HPV145 dual-section variable axial piston pump assembly with factory-calibrated regulators. New rotating groups and matched valve plates restore rated displacement and fast pressure response from first operation.
| Part Number | 9256100 |
|---|---|
| Part Name | Hydraulic Main Pump Assembly (HPV145) |
| Compatible Brand | Hitachi |
| Applicable Models | ZX330-3, ZX330-5G, ZX350H-3, EX300-3 Excavator |
| Application | HPV145 dual-section main variable axial piston pump for Hitachi ZX330-3-series |
| Material | Precision alloy steel rotating group and pump housing |
| Product Color | Industrial finish |
| Working Temperature | -25°C~+60°C |
| Key Function | Generates full dual-section hydraulic system flow for ZX330-3-series all-function simultaneous operation |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Both front and rear HPV145 sections are new, eliminating the flow imbalance between sections that causes asymmetric actuator speed when only one section is rebuilt.
Both section regulators factory-calibrated to ZX330-3 engine power and LS differential specification for immediate stable pump operation without field adjustment after installation.
Cylinder blocks, pistons, piston shoes and valve plates for both sections are new and matched, restoring OEM volumetric efficiency across the full HPV145 displacement range.
9256100 covers ZX330-3, ZX330-5G, ZX350H-3 and EX300-3 for direct pump replacement.
FAQ
Q: When is complete pump assembly replacement more economical than section-by-section repair on ZX330-3?
A: When both HPV145 sections show above-spec case drain simultaneously, or when machine hours are high enough that the surviving section is likely at similar wear life, complete pump replacement eliminates a second major disassembly within a short period.
Q: What oil circuit flushing procedure should I follow before fitting 9256100?
A: Drain the hydraulic tank, clean the interior, replace all filter elements including suction strainer, and refill with fresh hydraulic oil. Run at low pressure for 30 minutes before full-load operation.
Q: Does 9256100 include the pump coupling and drive plate?
A: The 9256100 assembly is the pump only. Inspect the coupling and drive plate before reuse; replace if either shows wear or imbalance to protect the new pump bearings.
Q: How to confirm 9256100 is correct for my ZX330-3?
A: Match part number 9256100 and confirm pump model is HPV145 on a ZX330-3, ZX330-5G, ZX350H-3 or EX300-3. Provide pump and machine serial numbers for cross-reference.
Q: What quality options are available?
A: We provide original, OEM and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies
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