PVD-00B-14P-3-4984A Nachi Split Flow Piston Pump 16cc 24.5MPa

Product Overview

The PVD-00B series (typical models PVD-00B-11-3-4732A, PVD-00B-14P-3-4984A, PVD-00B, PVD-00B-14P) is a Nachi PVD-series split-flow variable-displacement axial piston pump designed for mini excavators. A single housing generates two equal independent flows with less than 1% difference, ensuring straight-line travel accuracy. The unit offers 100% drop-in interchangeability with genuine Nachi pumps—no piping or mounting modifications required. Every unit undergoes full simulated operating-condition testing to guarantee high volumetric efficiency and reliability under high pressure and speed.

Technical Specifications 

• Model: PVD-00B-11-3-4732A / PVD-00B-14P-3-4984A / PVD-00B / PVD-00B-14P (smallest 00B frame)
• Maximum displacement: 8 × 2 = 16 cm³/rev (8 cm³ per section; 11P/14P etc. are limited-max-displacement variants)
• Maximum pressure: 24.5 MPa (245 bar / 3553 psi)
• Maximum speed: 2800 rpm
• Rated speed: 2800 rpm
• Minimum speed: 900 rpm
• Control: Constant horsepower (constant torque) control standard; optional power shift (P) or gear pump (G)
• Weight: approx. 9 kg
• Mounting flange: SAE B 2-bolt
• Design features: Internal drain (no external case drain line required), compact short axial length, right-hand rotation standard

Key Technical Advantages

1. Precision dual rotary groups and swashplate design keep flow difference between the two ports under 1%, ensuring accurate straight-line operation of the excavator.
2. High volumetric efficiency is maintained in the high-pressure range; maximum pressure of 24.5 MPa suits the main circuit loads of compact excavators.
3. Constant horsepower control automatically limits drive power to prevent engine stalling while fully utilising the engine power curve.
4. Ultra-compact short-length design with internal drain eliminates the need for an external case drain line, ideal for tight engine compartments.
5. 100% interchangeability plus full operating-condition testing ensures exact match of mounting dimensions, ports and control characteristics with original Nachi PVD-00B units, minimising downtime.

Application Areas

Designed as the main hydraulic pump for 1–2 ton class mini excavators, including Yanmar Vio30 / Vio33 / Vio35, Kubota U15 / KX series, Takeuchi TB015 / TB016, Hitachi ZX16 / ZX17 / ZX18 and similar compact construction machines.

Expert Maintenance Tips

1. Before installation, confirm rotation direction (standard right-hand) and spline shaft match; ensure precise SAE B flange alignment to avoid radial loads.
2. Fully bleed the system before first start-up. Use hydraulic fluid of appropriate cleanliness; the internal-drain design requires no external case drain line, but internal passages must remain clear.
3. Periodically check constant-horsepower control response and balance of the two flows; maintain adequate inlet pressure to prevent cavitation.
4. When changing filters and oil, inspect the pistons, valve plate and swashplate for wear. Perform preventive maintenance at the end of design life or when flow decreases to maximise hydraulic-system longevity.