PVD-2B-40P-6G3-4515H Nachi PVD Axial Piston Pump 45cc 245bar

Product Overview

The PVD-0B-19L3PS-8G-4609F / PVD-2B-40P-6G3-4515H belongs to the Nachi PVD series of split-flow variable displacement axial piston pumps designed for mini to mid-size excavators. It offers true drop-in interchangeability with original Nachi units—SAE-standard mounting flanges—so no piping modifications are required. Every unit is 100% tested under simulated operating conditions to guarantee reliable performance in excavator main hydraulic systems. Featuring dual-section split-flow design that delivers two nearly equal flows for straight-line track travel, plus constant horsepower control that fully utilizes engine power without stalling.

Technical Specifications 

• Model: PVD-2B-40P-6G3-4515H / PVD-0B-19L3PS-8G-4609F (PVD series)
• Displacement: PVD-2B approx. 22.5×2 = 45 cm³/rev; PVD-0B approx. 12×2 = 24 cm³/rev
• Maximum pressure: 24.5 MPa (245 bar)
• Maximum speed: PVD-2B 2600 rpm; PVD-0B 2800 rpm
• Rated speed: PVD-2B 2400 rpm; PVD-0B 2600 rpm
• Control type: Constant horsepower (with optional gear pump feedback)
• Weight: PVD-2B approx. 20 kg; PVD-0B approx. 13 kg
• Mounting: SAE B flange
• Application: Mini excavator main pump

Key Technical Advantages

1. Split-flow dual design: Flow difference between ports less than 1%, ensuring straight-line track travel without frequent correction.
2. Constant horsepower control: Fully utilizes engine power to increase working speed and force while preventing stalling.
3. High-efficiency axial piston design: Maintains high volumetric efficiency in the high-pressure range for excellent system efficiency.
4. Compact short axial length: Facilitates installation in tight engine compartments, saving space.
5. Optional rear gear pumps: Supports single or dual gear pump stacking for expanded functionality.

Application Areas

• Main hydraulic pumps for 1–6 ton mini excavators
• Travel and working circuits on crawler construction equipment
• Hydrostatic systems requiring synchronized dual flows
• Agricultural and municipal compact machinery

Expert Maintenance Tips

Ensure suction lines are adequately sized; internal drainage eliminates the need for external case drain lines. Fully bleed the system before first start-up and maintain high fluid cleanliness. Use recommended viscosity hydraulic oil and inspect filters regularly. Match constant horsepower control correctly to the engine. For long-term storage, fill with clean oil and seal all ports.