Main pump flow falling on your ZX330-3 despite normal engine speed? A worn 2022744 HPV145 cylinder block allows internal bypass to grow, causing progressive loss of hydraulic efficiency across all functions. RITO supplies this Handok-grade cylinder block to restore correct barrel geometry and recover full ZX330-3 pump output.
Item NO.:
2022744Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock2022744 Pump Cylinder Block for Hitachi HPV145 piston pumps on ZX330-3, ZX330-5G, ZX350H-3, EX300-3 and ZX360-3G excavators. The HPV145 is a high-displacement pump; precise bore-to-piston clearance and a lapped valve-face surface are essential to maintaining volumetric efficiency at full system pressure. This Handok-quality barrel restores those critical clearances from the first hour of operation.
| Part Number | 2022744 |
|---|---|
| Part Name | Pump Cylinder Block (HPV145) |
| Compatible Brand | Handok (Hitachi HPV145 Pump) |
| Applicable Models | ZX330-3, ZX330-5G, ZX350H-3, EX300-3, ZX360-3G Excavator |
| Application | Rotating group barrel of Hitachi HPV145 high-displacement piston pump |
| Material | High-strength alloy steel |
| Product Color | Silver machined metal finish |
| Working Temperature | -25°C~+60°C |
| Key Function | Houses the piston bores that generate main hydraulic pressure in the HPV145 pump |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Key rotating group components sourced to Handok precision standards, providing dimensional accuracy and material hardness consistent with Hitachi HPV145 pump specification.
Barrel wall thickness designed for HPV145 rated pressure, resisting bore distortion under sustained full-pressure operation on large ZX330-3 class excavators.
Valve-plate mating surface lapped to Ra 0.2 to maintain the sealing efficiency required for low case-drain flow and stable pressure output across the full HPV145 duty cycle.
2022744 covers ZX330-3, ZX330-5G, ZX350H-3, EX300-3 and ZX360-3G, simplifying procurement for Hitachi ZX330-series fleet maintenance.
FAQ
Q: How do I confirm the 2022744 cylinder block is the source of HPV145 flow loss?
A: Perform a combined case-drain flow test on both pump sections. If total case drain exceeds OEM spec (typically 20-25 L/min for HPV145 at rated speed and pressure), the barrel and valve plate are the primary wear components.
Q: Should I replace the valve plate together with the 2022744 barrel?
A: If the valve plate shows scoring, heat marks or uneven wear on its sealing face, replace it alongside the barrel. A new 2022744 barrel against a damaged valve plate will be re-scored within hours.
Q: Is HD designation for 2022744 the same quality as OEM Handok?
A: RITO HD-grade parts use Handok-standard materials and dimensional specifications as the reference. For critical pump applications on ZX330-3, confirm the expected service life with our technical team.
Q: How to confirm 2022744 fits my ZX330-3 HPV145 pump?
A: Verify pump model is HPV145 and existing barrel part number is 2022744. Provide pump and machine serial numbers to our team 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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