Nachi PVD Series Hydraulic Piston Pump

Engineering & Performance Excellence

When replacing a failed excavator pump, choosing an original Nachi PVD unit ensures zero compatibility issues and maximum service life.

• Integrated Multi-Circuit Design: The PVD-00B-15-3-4733A houses two variable displacement piston pumps and a fixed gear pump on a single drive shaft. This compact architecture reduces the number of hoses and fittings, minimizing potential leak points in tight engine compartments.

• Optimized Power Density: Despite its small footprint, this pump handles high operating pressures, allowing mini-excavators to perform heavy-duty tasks usually reserved for larger machines.

• Smooth Control Logic: The internal regulator is factory-tuned to provide precise flow-sharing, ensuring that when the operator moves two sticks at once, the machine reacts with fluid, predictable motion rather than jerky jumps.

• Superior Japan-Made Quality: Built with specialized wear-resistant materials for the cylinder block and valve plate, the Nachi PVD series offers exceptional durability against hydraulic fluid contamination and heat.

PVD-00B-15-3-4733A  PVD-00B-15P-5G3-4982A PVD-1B-23L3-7G-2232B PVD-2B-36L2DS-5S-4126G

Exact Technical Specifications Matrix

Frequently Asked Questions (FAQs)

Q1: What excavators use the Nachi PVD-00B-15-3-4733A pump? This specific pump is a common original equipment (OEM) component for many Japanese and European mini-excavators in the 1.5 to 2.5-ton range. It is widely used in brands like Kubota, Yanmar, and various specialized compact crawler machines.

Q2: Can this pump replace a PVD-1B or PVD-2B model? While they belong to the same family, each PVD size (00B, 0B, 1B, 2B, 3B) has different displacement ratings and mounting dimensions. You should always match the exact model number, such as PVD-00B-15-3-4733A, to ensure the mounting flange and hydraulic porting align with your machine.

Q3: Is the gear pump included in this unit? Yes. The PVD series is a “tandem” or “triple” pump assembly. The PVD-00B-15-3-4733A includes the two main piston pumps for travel/swing functions and the third gear pump for auxiliary/implement functions all within the same housing.

Q4: How can I tell if my Nachi pump is an “Original Japan” unit? Genuine Nachi pumps feature high-quality casting, precise nameplate engravings, and specific serial number formats. Original Japan-made units like the ones we supply offer significantly longer life and better efficiency compared to low-cost aftermarket copies.

Q5: What maintenance is required for a new PVD series pump? To protect your investment, you must replace the hydraulic oil and the return filter before installing the new pump. It is also critical to “bleed” or prime the pump housing with clean hydraulic oil through the case drain port before starting the engine to avoid a dry start.