مضخة هيدروليكية Nachi PVK-2B-505-N 4621412 4466809 لـ حفارة صغيرة Hitachi ZX55UR-2 ZX55UR-3 ZX55UR

Nachi PVK-2B-505-N Hydraulic Pump
4621412 4466809 OEM for Hitachi ZX55UR-2 ZX55UR-3 ZX55UR Mini Excavator


1. Product Description
The Nachi PVK-2B-505-N is a genuine OEM axial piston main pump, part numbers 4621412 and 4466809, designed for Hitachi 5-ton ultra-small excavators. It features high efficiency, low noise, stable pressure output, and strong durability. Perfect for tight-space construction and long-duration operation, it restores original machine power and efficiency.
2. Key Features & Technical Specifications
Model: PVK-2B-505-N
OEM Part Number: 4621412, 4466809
Pump Type: Variable displacement axial piston main pump
Displacement: 50 cm³/rev
Rated Pressure: 21 MPa
Max Working Pressure: 24 MPa
Rotation Direction: Clockwise (viewed from shaft end)
Operating Temperature: -10℃ ~ 80℃
Net Weight: 28 kg
Quality Standard: Genuine Nachi / OEM equivalent, CE certified
3. Compatibility Information
Direct replacement, no modification needed, fits the following Hitachi mini excavator models:
Hitachi ZX55UR
Hitachi ZX55UR-2
Hitachi ZX55UR-3
4. Technical Instructions
Adopts swash plate variable structure, adjusts flow automatically according to load to save fuel.
Hardened alloy internal parts reduce wear and extend service life.
Use ISO VG46 hydraulic oil; clean tank and lines thoroughly before installation.
Replace filters and oil regularly; avoid continuous overload operation.
5. Why Choose Us
Over 10 years specializing in excavator hydraulic core parts.
Supply genuine Nachi and high-quality aftermarket pumps for major brands.
Large stock in Guangzhou warehouse, fast delivery.
All products include 1-year warranty against manufacturing defects.
Multiple shipping options: express 3–7 days, sea freight 30–45 days.
6. FAQ
Q: Is this pump identical to the original 4621412 / 4466809?
A: Yes, 1:1 OEM match in dimensions, ports, and performance; direct bolt-on replacement.
Q: Do you have this pump in stock?
A: Yes, regular stock available; can ship within 1–2 business days.
Q: Can you confirm compatibility with my machine?
A: Certainly—send your excavator model or original part number for free verification.