KYB PSVD2 Series Hydraulic Piston Pump | PSVD2-17E PSVD2-21E PSVD2-27E | Excavator Main Pump

LIC Hydraulic’s KYB PSVD2 Series variable displacement piston pumps are the industry standard for mini-excavator hydraulic systems. This series (including PSVD2-12E, 14E, 16E, 21E, and specific part numbers like PSVD-14E-24 / B0600-16024) features a unique, ultra-compact design that integrates two variable piston pumps and one or two fixed gear pumps into a single housing. We guarantee 100% Drop-in Interchangeability for OEM replacements. Every PSVD2 unit undergoes 100% load-simulated flow synchronization testing to ensure smooth and powerful multi-function performance in the field.

Technical Specifications

• Series Model: PSVD2 Series (Twin Piston + Gear Pump Combo)

• Primary Models: PSVD2-17E / PSVD2-21E / PSVD2-14E-24

• Nominal Pressure: 210 bar (21 MPa / 3045 PSI)

• Peak Pressure: 250 bar (25 MPa / 3625 PSI)

• Machine Range: 1.5 to 6-ton mini-excavators (Kubota, IHI, Yanmar, Takeuchi, etc.)

• Control Type: Load Sensing or Constant Power Control

• Housing Material: High-tensile alloy cast iron

Key Technical Advantages

• Compact Integration: By combining multiple pump functions in one unit, the PSVD2 saves significant space and reduces the complexity of hydraulic piping. Two main pumps handle travel and digging, while the gear pumps manage swing and pilot control.

• Synchronized Multi-Motion: Engineered for superior flow distribution, ensuring that simultaneous movements (boom, arm, and swing) remain fluid and responsive without sudden power drops.

• Quiet-Flow Technology: Utilizing KYB’s patented 9-piston rotating group and silenced valve plates, the PSVD2 minimizes hydraulic ripple and mechanical noise, improving operator environment.

• Extreme Durability: Internal components are heat-treated for maximum wear resistance, allowing the pump to withstand high-frequency pressure spikes and harsh construction conditions.

Expert Maintenance Tips

• Pilot Oil Verification: In models like the PSVD-14E-24, ensure the integrated gear pump’s output is stable. Pilot pressure instability is often the root cause of “sluggish” controls.

• Hydraulic Oil Filtration: Mini-excavator pumps are highly sensitive. Maintain oil cleanliness at ISO 4406 18/16/13 to prevent scoring on the cylinder block and piston slippers.

• Suction Line Integrity: Check the suction hose for any soft spots or leaks. Air ingestion will cause cavitation and lead to rapid pump failure and excessive whining noise.